
Concept explainers
Solve each equation in Exercises 73–81 by the method of your choice.
One possible reason for the explosion of college tuition involves the decrease in government aid per student. In 2001, higher-education revenues per student averaged $8500. The bar graph shows government aid per U.S. college student from 2005 through 2012. (All figures are adjusted for inflation and expressed in 2012 dollars.)
The mathematical model
describes government aid per college student, G, x years after 2005.
a. Does the model underestimate or overestimate aid per student in 2011? By how much?
b. If we project the model past 2012, determine in which year government aid per student decreased to $4127.

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Chapter 1 Solutions
MyLab Math with Pearson eText -- Standalone Access Card -- for College Algebra (7th Edition)(Outer package may vary)
- 6 5 4 3 T 2 له 1- 1 -10-9 -8 -7 -6 -4 -3 -2 -1 0 2 3 4 5 -1- -2 -3 -4 -5. -8 -9. Which system is represented in the graph? Oy > x²+4x-5 y>x+5 Oy x²+4x-5 yarrow_forwardThe functions f(x) = x² - 3 and g(x) = x² + 2 are shown on the graph. + N y 10 LO 5 f(x) = x² - 3 4 ♡ -3 -2 -10 -1 -2 -4- -5 x 2 3 4 56 7 8 9 g(x) = x² + 2 If the equations were changed to the inequalities shown, explain how the graph would change. y≤ x² - 3 y>-x²+2arrow_forwardThe function f(x) is shown in the graph. 2 1 y -1 0 1 2 3 4 5 -1- -3. f(x) -4 -5 -6. Which type of function describes f(x)? ○ Exponential O Logarithmic ○ Rational O Polynomial .co. 6 7arrow_forwardThe functions f(x) = –4x + 5 and g(x) = x3 + x2 – 4x + 5 are given.Part A: What type of functions are f(x) and g(x)? Justify your answer.Part B: Find the domain and range for f(x) and g(x). Then compare the domains and compare the ranges of the functions.arrow_forwarda) IS AU B is independence linear Show that A and B also independence linear or hot and why, write. Example. 6) 18 M., M2 X and dim(x)=n and dim M, dim M₂7 Show that Mi M₂+ {0} and why? c) let M Me X and {X.,... xr} is beas of M, and {y,, ., un} is beas of M₂ and {x, xr, Menyuzis beas of X Show that X = M₁ M2 d) 15 M₁ = {(x, y, z, w) | x+y=0, Z=2W} CR" M₂ = (X, Y, Z, W)/x+Y+Z=0}arrow_forwardThe function f(x) is shown on the graph. ာ 2 3 2 f(x) 1 0 -1 -2 1 -3 -4 -5 2 3 4t Which type of function describes f(x)? Exponential O Logarithmic O Polynomial ○ Rationalarrow_forward1. For the following subsets of R3, explain whether or not they are a subspace of R³. (a) (b) 1.1 0.65 U = span -3.4 0.23 0.4 -0.44 0 (})} a V {(2) | ER (c) Z= the points in the z-axisarrow_forwardSolve the following equation forx. leave answer in Simplified radical form. 5x²-4x-3=6arrow_forwardMATCHING LIST Question 6 Listen Use the given equations and their discriminants to match them to the type and number of solutions. 00 ed two irrational solutions a. x²+10x-2=-24 two rational solutions b. 8x²+11x-3=7 one rational solution c. 3x²+2x+7=2 two non-real solutions d. x²+12x+45 = 9 DELL FLOWER CHILD 10/20 All Changes S $681 22991arrow_forward88 MULTIPLE CHOICE Question 7 Listen The following irrational expression is given in unsimplified form with four op- tions in simplified form. Select the correct simplified form. Select only one option. A 2±3√√2 B 4±√3 2±√ √3 D 1±√√3 DELL FLOWER CHILD 11/200 4 ± √48 4 ✓ All Changes Saved 165arrow_forwardUse the graph of y = f(x) to answer the following. 3- 2 -4 -2 -1 1 2 3 4 -1 2 m -3- + (d) Find all x for which f(x) = -2. If there is more than one value, separate them with commas or write your answer in interval notation, if necessary. Select "None", if applicable. Value(s) of x for which f(x)=-2: | (0,0) (0,0) (0,0) (0,0) 0,0... -00 None (h) Determine the range of f. The range is (0,0) Garrow_forwardWhat is g(f(4))arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_iosRecommended textbooks for you
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