Beginning and Intermediate Algebra
5th Edition
ISBN: 9781259616754
Author: Julie Miller, Molly O'Neill, Nancy Hyde
Publisher: McGraw-Hill Education
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Chapter 7.6, Problem 57PE
To determine
To calculate: The value of
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America is getting older. The graph shows the projected elderly U.S. population for ages 65–84 and for ages 85 and older.The formula E = 5.8√x + 56.4 models the projected number of elderly Americans ages 65–84, E, in millions, x years after 2020.a. Use the formula to find the projected increase in the number of Americans ages 65–84, in millions, from 2030 to 2060. Express this difference in simplified radicalform.b. Use a calculator and write your answer in part (a) to the nearest tenth. Does this rounded decimal overestimate or underestimate the difference in the projected data shown by the bar graph ? By how much?
Exercises 38–40 will help you prepare for the material covered in
the first section of the next chapter.
In Exercises 38-39, simplify each algebraic expression.
38. (-9x³ + 7x? - 5x + 3) + (13x + 2r? – &x – 6)
39. (7x3 – 8x? + 9x – 6) – (2x – 6x? – 3x + 9)
40. The figures show the graphs of two functions.
y
y
201
10-
....
-20-
flx) = x³
glx) = -0.3x + 4x + 2
In Exercises 11–12, find the solution set for each equation.
11. |5x + 3| = 7
12. |6x + 1| = [4x + 15||
Chapter 7 Solutions
Beginning and Intermediate Algebra
Ch. 7.1 - Evaluate the expression for the given values of x....Ch. 7.1 - Prob. 2SPCh. 7.1 - Evaluate the expression for the given values of x....Ch. 7.1 - Evaluate the expression for the given values of x....Ch. 7.1 - Prob. 5SPCh. 7.1 - Identify the restricted values.
6.
Ch. 7.1 - Identify the restricted values.
7.
Ch. 7.1 - Identify the restricted values.
8.
Ch. 7.1 - Given
9. Factor the numerator and denominator.
Ch. 7.1 - Prob. 10SP
Ch. 7.1 - Prob. 11SPCh. 7.1 - Prob. 12SPCh. 7.1 - Prob. 13SPCh. 7.1 - Prob. 14SPCh. 7.1 - Prob. 15SPCh. 7.1 - Prob. 1PECh. 7.1 - For Exercises 2–10, substitute the given number...Ch. 7.1 - For Exercises 2–10, substitute the given number...Ch. 7.1 - For Exercises 2–10, substitute the given number...Ch. 7.1 - For Exercises 2–10, substitute the given number...Ch. 7.1 - For Exercises 2–10, substitute the given number...Ch. 7.1 - For Exercises 2–10, substitute the given number...Ch. 7.1 - For Exercises 2–10, substitute the given number...Ch. 7.1 - For Exercises 2–10, substitute the given number...Ch. 7.1 - For Exercises 2–10, substitute the given number...Ch. 7.1 - 11. A bicyclist rides 24 mi against a wind and...Ch. 7.1 - Prob. 12PECh. 7.1 - For Exercises 13–24, identify the restricted...Ch. 7.1 - Prob. 14PECh. 7.1 - Prob. 15PECh. 7.1 - Prob. 16PECh. 7.1 - For Exercises 13–24, identify the restricted...Ch. 7.1 - Prob. 18PECh. 7.1 - For Exercises 13–24, identify the restricted...Ch. 7.1 - For Exercises 13–24, identify the restricted...Ch. 7.1 - Prob. 21PECh. 7.1 - Prob. 22PECh. 7.1 - For Exercises 13–24, identify the restricted...Ch. 7.1 - For Exercises 13–24, identify the restricted...Ch. 7.1 - 25. Construct a rational expression that is...Ch. 7.1 - Prob. 26PECh. 7.1 - Construct a rational expression that is undefined...Ch. 7.1 - Construct a rational expression that is undefined...Ch. 7.1 - Evaluate the expressions for x = − 1 . a. 3 x 2 −...Ch. 7.1 - Evaluate the expressions for x = 4 . a. ( x + 5 )...Ch. 7.1 - Prob. 31PECh. 7.1 - Prob. 32PECh. 7.1 - For Exercises 33–42,
a. Identify the restricted...Ch. 7.1 - For Exercises 33–42,
a. Identify the restricted...Ch. 7.1 - For Exercises 33–42, a. Identify the restricted...Ch. 7.1 - For Exercises 33–42, a. Identify the restricted...Ch. 7.1 - For Exercises 33–42, a. Identify the restricted...Ch. 7.1 - Prob. 38PECh. 7.1 - Prob. 39PECh. 7.1 - For Exercises 33–42,
a. Identify the restricted...Ch. 7.1 - For Exercises 33–42, a. Identify the restricted...Ch. 7.1 - Prob. 42PECh. 7.1 - Prob. 43PECh. 7.1 - Prob. 44PECh. 7.1 - Prob. 45PECh. 7.1 - Prob. 46PECh. 7.1 - Prob. 47PECh. 7.1 - Prob. 48PECh. 7.1 - Prob. 49PECh. 7.1 - Prob. 50PECh. 7.1 - Prob. 51PECh. 7.1 - Prob. 52PECh. 7.1 - Prob. 53PECh. 7.1 - Prob. 54PECh. 7.1 - Prob. 55PECh. 7.1 - Prob. 56PECh. 7.1 - Prob. 57PECh. 7.1 - For Exercises 43–72, simplify the rational...Ch. 7.1 - Prob. 59PECh. 7.1 - Prob. 60PECh. 7.1 - Prob. 61PECh. 7.1 - Prob. 62PECh. 7.1 - Prob. 63PECh. 7.1 - Prob. 64PECh. 7.1 - Prob. 65PECh. 7.1 - Prob. 66PECh. 7.1 - Prob. 67PECh. 7.1 - Prob. 68PECh. 7.1 - Prob. 69PECh. 7.1 - Prob. 70PECh. 7.1 - Prob. 71PECh. 7.1 - Prob. 72PECh. 7.1 - What is the relationship between x − 2 and 2 − x ?Ch. 7.1 - What is the relationship between w + p and − w − p...Ch. 7.1 - Prob. 75PECh. 7.1 - Prob. 76PECh. 7.1 - Prob. 77PECh. 7.1 - Prob. 78PECh. 7.1 - Prob. 79PECh. 7.1 - Prob. 80PECh. 7.1 - Prob. 81PECh. 7.1 - Prob. 82PECh. 7.1 - Prob. 83PECh. 7.1 - Prob. 84PECh. 7.1 - For Exercises 75–86, simplify the rational...Ch. 7.1 - Prob. 86PECh. 7.1 - Prob. 87PECh. 7.1 - Prob. 88PECh. 7.1 - Prob. 89PECh. 7.1 - Prob. 90PECh. 7.1 - Prob. 91PECh. 7.1 - Prob. 92PECh. 7.1 - Prob. 93PECh. 7.1 - Prob. 94PECh. 7.1 - Prob. 95PECh. 7.1 - Prob. 96PECh. 7.1 - For Exercises 87–100, simplify the rational...Ch. 7.1 - For Exercises 87–100, simplify the rational...Ch. 7.1 - For Exercises 87–100, simplify the rational...Ch. 7.1 - Prob. 100PECh. 7.1 - Prob. 101PECh. 7.1 - Prob. 102PECh. 7.1 - For Exercises 101–104, factor and simplify. z 2 −...Ch. 7.1 - Prob. 104PECh. 7.2 - Prob. 1SPCh. 7.2 - Multiply. 4 x − 8 x + 6 ⋅ x 2 + 6 x 2 xCh. 7.2 - Prob. 3SPCh. 7.2 - Divide. 7 y − 14 y + 1 ÷ y 2 + 2 y − 8 2 y + 2Ch. 7.2 - Prob. 5SPCh. 7.2 - Divide.
6.
Ch. 7.2 - Prob. 7SPCh. 7.2 - Prob. 1PECh. 7.2 - Prob. 2PECh. 7.2 - Prob. 3PECh. 7.2 - Prob. 4PECh. 7.2 - Prob. 5PECh. 7.2 - Prob. 6PECh. 7.2 - For Exercises 1–8, multiply or divide the...Ch. 7.2 - For Exercises 1–8, multiply or divide the...Ch. 7.2 - Prob. 9PECh. 7.2 - Prob. 10PECh. 7.2 - Prob. 11PECh. 7.2 - Prob. 12PECh. 7.2 - Prob. 13PECh. 7.2 - Prob. 14PECh. 7.2 - Prob. 15PECh. 7.2 - Prob. 16PECh. 7.2 - Prob. 17PECh. 7.2 - Prob. 18PECh. 7.2 - Prob. 19PECh. 7.2 - Prob. 20PECh. 7.2 - Prob. 21PECh. 7.2 - For Exercises 9–24, multiply. (See Examples...Ch. 7.2 - For Exercises 9–24, multiply. (See Examples...Ch. 7.2 - Prob. 24PECh. 7.2 - For Exercises 25–38, divide.(See Examples 4–6.) 4...Ch. 7.2 - Prob. 26PECh. 7.2 - Prob. 27PECh. 7.2 - Prob. 28PECh. 7.2 - Prob. 29PECh. 7.2 - Prob. 30PECh. 7.2 - For Exercises 25–38, divide.(See Examples 4–6.) 3...Ch. 7.2 - Prob. 32PECh. 7.2 - For Exercises 25–38, divide.(See Examples 4–6.) m...Ch. 7.2 - For Exercises 25–38, divide.(See Examples 4–6.) 9...Ch. 7.2 - For Exercises 25–38, divide.(See Examples 4–6.) 3...Ch. 7.2 - Prob. 36PECh. 7.2 - For Exercises 25–38, divide.(See Examples 4–6.) p...Ch. 7.2 - Prob. 38PECh. 7.2 - Prob. 39PECh. 7.2 - Prob. 40PECh. 7.2 - Prob. 41PECh. 7.2 - Prob. 42PECh. 7.2 - Prob. 43PECh. 7.2 - For Exercises 39–64, multiply or divide as...Ch. 7.2 - Prob. 45PECh. 7.2 - Prob. 46PECh. 7.2 - For Exercises 39–64, multiply or divide as...Ch. 7.2 - Prob. 48PECh. 7.2 - For Exercises 39–64, multiply or divide as...Ch. 7.2 - Prob. 50PECh. 7.2 - Prob. 51PECh. 7.2 - Prob. 52PECh. 7.2 - Prob. 53PECh. 7.2 - Prob. 54PECh. 7.2 - For Exercises 39–64, multiply or divide as...Ch. 7.2 - Prob. 56PECh. 7.2 - Prob. 57PECh. 7.2 - Prob. 58PECh. 7.2 - Prob. 59PECh. 7.2 - For Exercises 39–64, multiply or divide as...Ch. 7.2 - For Exercises 39–64, multiply or divide as...Ch. 7.2 - Prob. 62PECh. 7.2 - For Exercises 39–64, multiply or divide as...Ch. 7.2 - For Exercises 39–64, multiply or divide as...Ch. 7.2 - For Exercises 65–70, multiply or divide as...Ch. 7.2 - Prob. 66PECh. 7.2 - Prob. 67PECh. 7.2 - For Exercises 65–70, multiply or divide as...Ch. 7.2 - For Exercises 65–70, multiply or divide as...Ch. 7.2 - For Exercises 65–70, multiply or divide as...Ch. 7.3 - Find the LCD for each set of expressions. 3 8 ; 7...Ch. 7.3 - Prob. 2SPCh. 7.3 - Prob. 3SPCh. 7.3 - Prob. 4SPCh. 7.3 - For each pair of expressions, find the LCD, and...Ch. 7.3 - Prob. 6SPCh. 7.3 - Prob. 7SPCh. 7.3 - a. Find the LCD of the expression. 9 w − 2 ; 11 2...Ch. 7.3 - Prob. 1PECh. 7.3 - Evaluate the expression for the given values of x....Ch. 7.3 - For Exercises 3–4, identify the restricted values....Ch. 7.3 - Prob. 4PECh. 7.3 - For Exercises 5–8, multiply or divide as...Ch. 7.3 - Prob. 6PECh. 7.3 - For Exercises 5–8, multiply or divide as...Ch. 7.3 - Prob. 8PECh. 7.3 - Which of the expressions are equivalent to − 5 x −...Ch. 7.3 - Prob. 10PECh. 7.3 - Prob. 11PECh. 7.3 - Prob. 12PECh. 7.3 - Prob. 13PECh. 7.3 - For Exercises 13–30, identify the LCD. (See...Ch. 7.3 - Prob. 15PECh. 7.3 - Prob. 16PECh. 7.3 - Prob. 17PECh. 7.3 - Prob. 18PECh. 7.3 - Prob. 19PECh. 7.3 - Prob. 20PECh. 7.3 - Prob. 21PECh. 7.3 - Prob. 22PECh. 7.3 - Prob. 23PECh. 7.3 - Prob. 24PECh. 7.3 - Prob. 25PECh. 7.3 - Prob. 26PECh. 7.3 - Prob. 27PECh. 7.3 - Prob. 28PECh. 7.3 - Prob. 29PECh. 7.3 - Prob. 30PECh. 7.3 - Explain why a common denominator of b + 1 b − 1...Ch. 7.3 - Prob. 32PECh. 7.3 - Prob. 33PECh. 7.3 - Prob. 34PECh. 7.3 - Prob. 35PECh. 7.3 - Prob. 36PECh. 7.3 - Prob. 37PECh. 7.3 - Prob. 38PECh. 7.3 - Prob. 39PECh. 7.3 - Prob. 40PECh. 7.3 - Prob. 41PECh. 7.3 - Prob. 42PECh. 7.3 - For Exercises 33–56, find the LCD. Then convert...Ch. 7.3 - Prob. 44PECh. 7.3 - Prob. 45PECh. 7.3 - Prob. 46PECh. 7.3 - Prob. 47PECh. 7.3 - Prob. 48PECh. 7.3 - Prob. 49PECh. 7.3 - Prob. 50PECh. 7.3 - Prob. 51PECh. 7.3 - Prob. 52PECh. 7.3 - Prob. 53PECh. 7.3 - Prob. 54PECh. 7.3 - Prob. 55PECh. 7.3 - Prob. 56PECh. 7.3 - Prob. 57PECh. 7.3 - For Exercises 57–60, find the LCD. Then convert...Ch. 7.3 - Prob. 59PECh. 7.3 - For Exercises 57–60, find the LCD. Then convert...Ch. 7.4 - Add or subtract as indicated. 3 14 + 4 14Ch. 7.4 - Add or subtract as indicated. 2 7 d − 9 7 dCh. 7.4 - Add or subtract as indicated.
3.
Ch. 7.4 - Add or subtract as indicated. 4 t − 9 2 t + 2 − t...Ch. 7.4 - Subtract.
5.
Ch. 7.4 - Subtract. t 12 − t − 2 4Ch. 7.4 - Add.
7.
Ch. 7.4 - Subtract. 2 y y − 1 − 1 y − 2 y + 1 y 2 − yCh. 7.4 - Add. 3 p − 8 + 1 8 − pCh. 7.4 - Write the English phrase as a mathematical...Ch. 7.4 - For the rational expression x 2 − 4 x − 5 x 2 − 7...Ch. 7.4 - For the rational expression a 2 + a − 2 a 2 − 4 a...Ch. 7.4 - For Exercises 3–4, multiply or divide as...Ch. 7.4 - For Exercises 3–4, multiply or divide as...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 5–26, add or subtract the...Ch. 7.4 - For Exercises 27–28, find an expression that...Ch. 7.4 - For Exercises 27–28, find an expression that...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 29–70, add or subtract the...Ch. 7.4 - For Exercises 71–72, find an expression that...Ch. 7.4 - For Exercises 71–72, find an expression that...Ch. 7.4 - Let a number be represented by n. Write the...Ch. 7.4 - Write the reciprocal of the sum of a number and 6.Ch. 7.4 - 75. Write the quotient of 5 and the sum of a...Ch. 7.4 - Write the quotient of 12 and p.Ch. 7.4 - Prob. 77PECh. 7.4 - Prob. 78PECh. 7.4 - Prob. 79PECh. 7.4 - Prob. 80PECh. 7.4 - For Exercises 81–86, perform the indicated...Ch. 7.4 - For Exercises 81–86, perform the indicated...Ch. 7.4 - For Exercises 81–86, perform the indicated...Ch. 7.4 - For Exercises 81–86, perform the indicated...Ch. 7.4 - For Exercises 81–86, perform the indicated...Ch. 7.4 - For Exercises 81–86, perform the indicated...Ch. 7.4 - For Exercises 87–90, simplify by applying the...Ch. 7.4 - For Exercises 87–90, simplify by applying the...Ch. 7.4 - For Exercises 87–90, simplify by applying the...Ch. 7.4 - For Exercises 87–90, simplify by applying the...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.4 - We have learned how to simplify, add, subtract,...Ch. 7.5 - Simplify the expression. 6 x y 9 2 yCh. 7.5 - Simplify the expression. 3 4 − 1 6 + 2 1 3 + 1 2Ch. 7.5 - Simplify the expression. 1 − 1 p p w + w pCh. 7.5 - Simplify the expression. 1 − 3 5 1 4 − 7 10 + 1Ch. 7.5 - Simplify the expression. z 3 − 3 z 1 + 3 zCh. 7.5 - Simplify the expression. 4 p − 3 + 1 1 + 2 p − 3Ch. 7.5 - 1. A _____________ fraction is an expression...Ch. 7.5 - For Exercises 2–3, simplify the expression.
2.
Ch. 7.5 - For Exercises 2–3, simplify the expression. a + 5...Ch. 7.5 - For Exercises 4–6, perform the indicated...Ch. 7.5 - For Exercises 4–6, perform the indicated...Ch. 7.5 - For Exercises 4–6, perform the indicated...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - For Exercises 7–34, simplify the complex fractions...Ch. 7.5 - Prob. 35PECh. 7.5 - Prob. 36PECh. 7.5 - Prob. 37PECh. 7.5 - Prob. 38PECh. 7.5 - Prob. 39PECh. 7.5 - Prob. 40PECh. 7.5 - Prob. 41PECh. 7.5 - Prob. 42PECh. 7.5 - Prob. 43PECh. 7.5 - For Exercises 41–50, simplify the complex...Ch. 7.5 - Prob. 45PECh. 7.5 - Prob. 46PECh. 7.5 - Prob. 47PECh. 7.5 - Prob. 48PECh. 7.5 - Prob. 49PECh. 7.5 - Prob. 50PECh. 7.5 - Prob. 51PECh. 7.5 - Prob. 52PECh. 7.6 - Prob. 1SPCh. 7.6 - Prob. 2SPCh. 7.6 - Prob. 3SPCh. 7.6 - Prob. 4SPCh. 7.6 - Solve the equation. − 8 x 2 + 6 x + 8 + x x + 4 =...Ch. 7.6 - Prob. 6SPCh. 7.6 - Prob. 7SPCh. 7.6 - Solve the formula for x. y = 3 x − 2Ch. 7.6 - Prob. 9SPCh. 7.6 - Prob. 1PECh. 7.6 - Prob. 2PECh. 7.6 - Prob. 3PECh. 7.6 - Prob. 4PECh. 7.6 - Prob. 5PECh. 7.6 - Prob. 6PECh. 7.6 - Prob. 7PECh. 7.6 - Prob. 8PECh. 7.6 - Prob. 9PECh. 7.6 - Prob. 10PECh. 7.6 - Prob. 11PECh. 7.6 - Prob. 12PECh. 7.6 - Prob. 13PECh. 7.6 - Prob. 14PECh. 7.6 - Prob. 15PECh. 7.6 - Identify the LCD of all the denominators in the...Ch. 7.6 - Prob. 17PECh. 7.6 - Prob. 18PECh. 7.6 - Prob. 19PECh. 7.6 - Prob. 20PECh. 7.6 - Prob. 21PECh. 7.6 - Prob. 22PECh. 7.6 - Prob. 23PECh. 7.6 - Prob. 24PECh. 7.6 - Prob. 25PECh. 7.6 - For Exercises 17–46, solve the equations. (See...Ch. 7.6 - Prob. 27PECh. 7.6 - Prob. 28PECh. 7.6 - Prob. 29PECh. 7.6 - Prob. 30PECh. 7.6 - Prob. 31PECh. 7.6 - Prob. 32PECh. 7.6 - Prob. 33PECh. 7.6 - Prob. 34PECh. 7.6 - Prob. 35PECh. 7.6 - Prob. 36PECh. 7.6 - Prob. 37PECh. 7.6 - Prob. 38PECh. 7.6 - Prob. 39PECh. 7.6 - Prob. 40PECh. 7.6 - Prob. 41PECh. 7.6 - Prob. 42PECh. 7.6 - Prob. 43PECh. 7.6 - For Exercises 17–46, solve the equations. (See...Ch. 7.6 - Prob. 45PECh. 7.6 - Prob. 46PECh. 7.6 - Prob. 47PECh. 7.6 - Prob. 48PECh. 7.6 - Prob. 49PECh. 7.6 - Prob. 50PECh. 7.6 - Prob. 51PECh. 7.6 - Prob. 52PECh. 7.6 - Prob. 53PECh. 7.6 - Prob. 54PECh. 7.6 - Prob. 55PECh. 7.6 - Prob. 56PECh. 7.6 - Prob. 57PECh. 7.6 - Prob. 58PECh. 7.6 - Prob. 59PECh. 7.6 - Prob. 60PECh. 7.6 - Prob. 61PECh. 7.6 - Prob. 62PECh. 7.6 - Prob. 63PECh. 7.6 - Prob. 64PECh. 7.6 - Prob. 65PECh. 7.6 - Prob. 66PECh. 7.6 - For Exercises 51–68, solve for the indicated...Ch. 7.6 - For Exercises 51–68, solve for the indicated...Ch. 7.6 - Prob. 1PRECh. 7.6 - Prob. 2PRECh. 7.6 - Prob. 3PRECh. 7.6 - Prob. 4PRECh. 7.6 - Prob. 5PRECh. 7.6 - Prob. 6PRECh. 7.6 - Prob. 7PRECh. 7.6 - Prob. 8PRECh. 7.6 - Prob. 9PRECh. 7.6 - Prob. 10PRECh. 7.6 - Prob. 11PRECh. 7.6 - Prob. 12PRECh. 7.6 - Prob. 13PRECh. 7.6 - Prob. 14PRECh. 7.6 - Prob. 15PRECh. 7.6 - Prob. 16PRECh. 7.6 - Prob. 17PRECh. 7.6 - Prob. 18PRECh. 7.6 - Prob. 19PRECh. 7.6 - Prob. 20PRECh. 7.7 - Solve the proportion.
1.
Ch. 7.7 - Prob. 2SPCh. 7.7 - Prob. 3SPCh. 7.7 - The Sun casts a 3.2-ft shadow of a 6- ft man. At...Ch. 7.7 - Prob. 5SPCh. 7.7 - Prob. 6SPCh. 7.7 - The computer at a bank can process and prepare the...Ch. 7.7 - Prob. 1PECh. 7.7 - For Exercises 2–7, determine whether each of the...Ch. 7.7 - For Exercises 2–7, determine whether each of the...Ch. 7.7 - Prob. 4PECh. 7.7 - Prob. 5PECh. 7.7 - For Exercises 2–7, determine whether each of the...Ch. 7.7 - Prob. 7PECh. 7.7 - For Exercises 2–7, determine whether each of the...Ch. 7.7 - For Exercises 9–22, solve the proportions. (See...Ch. 7.7 - Prob. 10PECh. 7.7 - Prob. 11PECh. 7.7 - For Exercises 9–22, solve the proportions. (See...Ch. 7.7 - Prob. 13PECh. 7.7 - Prob. 14PECh. 7.7 - For Exercises 9–22, solve the proportions. (See...Ch. 7.7 - Prob. 16PECh. 7.7 - Prob. 17PECh. 7.7 - Prob. 18PECh. 7.7 - For Exercises 9–22, solve the proportions. (See...Ch. 7.7 - Prob. 20PECh. 7.7 - Prob. 21PECh. 7.7 - Prob. 22PECh. 7.7 - Charles’ law describes the relationship between...Ch. 7.7 - Prob. 24PECh. 7.7 - For Exercises 25–32, solve using...Ch. 7.7 - For Exercises 25–32, solve using proportions. Tim...Ch. 7.7 - For Exercises 25–32, solve using proportions. It...Ch. 7.7 - For Exercises 25–32, solve using proportions....Ch. 7.7 - For Exercises 25–32, solve using...Ch. 7.7 - For Exercises 25–32, solve using...Ch. 7.7 - For Exercises 25–32, solve using...Ch. 7.7 - A map has a scale of 50 mi/in. If two cities...Ch. 7.7 - Prob. 33PECh. 7.7 - Prob. 34PECh. 7.7 - Prob. 35PECh. 7.7 - Prob. 36PECh. 7.7 - Prob. 37PECh. 7.7 - Prob. 38PECh. 7.7 - 39. A 6-ft-tall man standing 54 ft from a light...Ch. 7.7 - Prob. 40PECh. 7.7 - A boat travels 54 mi upstream against the current...Ch. 7.7 - Prob. 42PECh. 7.7 - Prob. 43PECh. 7.7 - Prob. 44PECh. 7.7 - Prob. 45PECh. 7.7 - Devon can cross-country ski 5 km/hr faster than...Ch. 7.7 - 47. Floyd can walk 2 mph faster than his wife,...Ch. 7.7 - 48. Janine bikes 3 mph faster than her sister,...Ch. 7.7 - Prob. 49PECh. 7.7 - Amber jogs 10 km in 3 4 hr less time than she can...Ch. 7.7 - Prob. 51PECh. 7.7 - The CUT-IT-OUT lawn mowing company consists of two...Ch. 7.7 - Prob. 53PECh. 7.7 - Prob. 54PECh. 7.7 - 55. A pipe can fill a reservoir in 16 hr. A...Ch. 7.7 - 56. A hole in the bottom of a child’s plastic...Ch. 7.7 - Tim and Al are bricklayers. Tim can construct an...Ch. 7.7 - Prob. 58PECh. 7.7 - For Exercises 59–62, solve using...Ch. 7.7 - Prob. 60PECh. 7.7 - Prob. 61PECh. 7.7 - For Exercises 59–62, solve using proportions. The...Ch. 7 - For the rational expression t − 2 t + 9 a....Ch. 7 - Prob. 2RECh. 7 - Which of the rational expressions are equal to...Ch. 7 - For Exercises 4–13, identify the restricted...Ch. 7 - For Exercises 4–13, identify the restricted...Ch. 7 - For Exercises 4–13, identify the restricted...Ch. 7 - Prob. 7RECh. 7 - Prob. 8RECh. 7 - Prob. 9RECh. 7 - Prob. 10RECh. 7 - For Exercises 4–13, identify the restricted...Ch. 7 - Prob. 12RECh. 7 - For Exercises 4–13, identify the restricted...Ch. 7 - Prob. 14RECh. 7 - For Exercises 14–27, multiply or divide as...Ch. 7 - Prob. 16RECh. 7 - For Exercises 14–27, multiply or divide as...Ch. 7 - Prob. 18RECh. 7 - For Exercises 14–27, multiply or divide as...Ch. 7 - For Exercises 14–27, multiply or divide as...Ch. 7 - Prob. 21RECh. 7 - Prob. 22RECh. 7 - Prob. 23RECh. 7 - Prob. 24RECh. 7 - Prob. 25RECh. 7 - Prob. 26RECh. 7 - Prob. 27RECh. 7 - Prob. 28RECh. 7 - Prob. 29RECh. 7 - Prob. 30RECh. 7 - Prob. 31RECh. 7 - Prob. 32RECh. 7 - Prob. 33RECh. 7 - Prob. 34RECh. 7 - Prob. 35RECh. 7 - Prob. 36RECh. 7 - For Exercises 32–37, write each fraction as an...Ch. 7 - Prob. 38RECh. 7 - Prob. 39RECh. 7 - Prob. 40RECh. 7 - Prob. 41RECh. 7 - Prob. 42RECh. 7 - Prob. 43RECh. 7 - For Exercises 38–49, add or subtract as...Ch. 7 - For Exercises 38–49, add or subtract as indicated....Ch. 7 - Prob. 46RECh. 7 - Prob. 47RECh. 7 - Prob. 48RECh. 7 - Prob. 49RECh. 7 - Prob. 50RECh. 7 - Prob. 51RECh. 7 - Prob. 52RECh. 7 - Prob. 53RECh. 7 - Prob. 54RECh. 7 - Prob. 55RECh. 7 - Prob. 56RECh. 7 - Prob. 57RECh. 7 - Prob. 58RECh. 7 - Prob. 59RECh. 7 - Prob. 60RECh. 7 - Prob. 61RECh. 7 - Prob. 62RECh. 7 - Prob. 63RECh. 7 - Prob. 64RECh. 7 - Prob. 65RECh. 7 - Prob. 66RECh. 7 - Prob. 67RECh. 7 - Prob. 68RECh. 7 - For Exercises 69–70, solve the proportions. m + 2...Ch. 7 - For Exercises 69–70, solve the proportions.
70.
Ch. 7 - 71. A bag of popcorn states that it contains 4 g...Ch. 7 - 72. Bud goes 10 mph faster on his motorcycle than...Ch. 7 - Prob. 73RECh. 7 - Prob. 74RECh. 7 - For Exercises 1-2, a. Identify the restricted...Ch. 7 - For Exercises 1-2, a. Identify the restricted...Ch. 7 - Identify the rational expressions that are equal...Ch. 7 - Prob. 4TCh. 7 - Prob. 5TCh. 7 - Prob. 6TCh. 7 - Prob. 7TCh. 7 - Prob. 8TCh. 7 - Prob. 9TCh. 7 - Prob. 10TCh. 7 - For Exercises 5–11, perform the indicated...Ch. 7 - Prob. 12TCh. 7 - Prob. 13TCh. 7 - Prob. 14TCh. 7 - Prob. 15TCh. 7 - Prob. 16TCh. 7 - Prob. 17TCh. 7 - Prob. 18TCh. 7 - Prob. 19TCh. 7 - Prob. 20TCh. 7 - 21. Two printers working together can complete a...Ch. 7 - Prob. 22TCh. 7 - 23. The amount of medication prescribed for a...Ch. 7 - 24. The number of drinks sold at a concession...Ch. 7 - Prob. 1CRECh. 7 - Prob. 2CRECh. 7 - Prob. 3CRECh. 7 - Prob. 4CRECh. 7 - Prob. 5CRECh. 7 - Prob. 6CRECh. 7 - Prob. 7CRECh. 7 - Prob. 8CRECh. 7 - Prob. 9CRECh. 7 - Factor completely. 10 c d + 5 d − 6 c − 3Ch. 7 - Prob. 11CRECh. 7 - Prob. 12CRECh. 7 - Prob. 13CRECh. 7 - Prob. 14CRECh. 7 - Prob. 15CRECh. 7 - Prob. 16CRECh. 7 - Prob. 17CRECh. 7 - Prob. 18CRECh. 7 - Prob. 19CRECh. 7 - A group of teenagers buys 2 large popcorns and 6...
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- In Exercises 59–64, solve and check each linear equation. 59. 2x – 5 = 7 60. 5x + 20 = 3x 61. 7(x – 4) = x + 2 62. 1 - 2(6 – x) = 3x + 2 63. 2(x – 4) + 3(x + 5) = 2x – 2 64. 2x 4(5x + 1) = 3x + 17arrow_forwardplease solve asaparrow_forwardIn Exercises 23–25, solve each equation. If the solution set is Ø or (-0, ), classify the equation as an inconsistent equation or an identity. 23. 3(2x – 4) = 9 – 3(x + 1) 2x 24. x - 4 x + 1 4 2 4 25. 3(x – 4) + x = 2(6 + 2x)arrow_forward
- Solve the variation problems in Exercises 68–73. 68. A company's profit varies directly as the number of products it sells. The company makes a profit of $1175 on the sale of 25 products. What is the company's profit when it sells 105 products? 69. The distance that a body falls from rest varies directly as the square of the time of the fall. If skydivers fall 144 feet in 3 seconds, how far will they fall in 10 seconds? 70. The pitch of a musical tone varies inversely as its wavelength. A tone has a pitch of 660 vibrations per second and a wavelength of 1.6 feet. What is the pitch of a tone that has a wavelength of 2.4 feet? 71. The loudness of a stereo speaker, measured in decibels, varies inversely as the square of your distance from the speaker. When you are 8 feet from the speaker, the loudness is 28 decibels. What is the loudness when you are 4 feet from the speaker? 72. The time required to assemble computers varies directly as the number of computers assembled and inversely as…arrow_forwardIn Exercises 43–54, solve each absolute value equation or indicate the equation has no solution. 43. |x – 2| = 7 45. |2x – 1| = 5 47. 2|3x – 2| = 14 44. |x + 1| = 5 46. |2r – 3| = 11 48. 3|2x – 1| = 21 %3D %3D 5 24 - + 6 = 18 50. 4 1 x + 7 = 10 51. |x + 1| + 5 = 3 53. |2x – 1| + 3 = 3 52. |x + 1| + 6 = 2 54. |3x – 2| + 4 = 4arrow_forwardFor Exercises 81–100, make an appropriate substitution and solve the equation. (See Examples 10–11) 81. (2x + 5)? – 7(2x + 5) - 30 = 0 82. (Зх — 7)? - 6(3х — 7)-16 3D 0 83. (x + 2x)? – 18(r + 2x) = -45 84. (x + 3x)? - 86. (у? — 3)? — 9(y? — 3) — 52 %3D 0 14(x + 3x) = -40 85. (x + 2)2 + (x + 2) – 42 = 0 10 2 10 - 61 m - - 27 = 0 x + + 35 = 0 87. 88. - 121 x + т - m m 89. 2 + 2 + = 12 90. + 3 + 6 + 3 = -8 91. 5c2/5 11c/5 + 2 = 0 92. З3 d'/3 – 4 = 0 93. y'/2 – y/4 6 = 0 94. n'/2 + 6n/4 – 16 = 0 95. 9y 10y + 1 = 0 96. 100х-4 29x-2 + 1 = 0 | 97. 4t – 25 Vi = 0 98. 9m – 16Vm = 0 100. 392 + 16q -1 99. 30k-2 – 23k- + 2 = 0 + 5 = 0arrow_forward
- In Exercises 105–107, solve each equation using a graphing utility. Graph each side separately in the same viewing rectangle. The solutions are the x-coordinates of the intersection points. 105. |x + 1|| 106. 13(x + 4)| = 12 107. 12x – 3| = 19 – 4x|arrow_forwardIn Exercises 65–69, solve each equation. 2x 65. 3 1 + 1 6. 66. 2 10 2 2x 67. 3 68. 4 2 + 3 4 Зх + 1 13 1 - x 69. 3 2 4 6 ||arrow_forwardScientific Notation. In Exercises 9–12, the given expressions are designed to yield results expressed in a form of scientific notation. For example, the calculator-displayed result of 1.23E5 can be expressed as 123,000, and the result of 1.23E-4 can be expressed as 0.000123. Perform the indicated operation and express the result as an ordinary number that is not in scientific notation. 614arrow_forward
- Exercises 105–107 will help you prepare for the material covered in the next section. 105. Let x represent a number. a. Write an equation in x that describes the following conditions: Four less than three times the number is 32. b. Solve the equation and determine the number. 106. Let x represent the number of countries in the world that are not free. The number of free countries exceeds the number of not-free countries by 44. Write an algebraic expression that represents the number of free countries. 107. You purchase a new car for $20,000. Each year the value of the car decreases by $2500. Write an algebraic expression that represents the car's value, in dollars, after x years.arrow_forwardExercises 150–152 will help you prepare for the material covered in the next section. In each exercise, perform the indicated operation. Where possible, reduce the answer to its lowest terms. 7 150. 10 3 1 151. 2 2 7 152. 15 3 10 3 10arrow_forwardanswer part d as well asaparrow_forward
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