A Problem Solving Approach to Mathematics for Elementary School Teachers (12th Edition)
A Problem Solving Approach to Mathematics for Elementary School Teachers (12th Edition)
12th Edition
ISBN: 9780321987297
Author: Rick Billstein, Shlomo Libeskind, Johnny Lott
Publisher: PEARSON
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Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 …
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experime…
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Chapter 8.4A, Problem 9A

Quick-Talk advertises monthly cellualr phoneservice for $ 0.50 a minute for the first 60 minutes but only $ 0.10 a minute for each minute thereaftre. Quick-Talk charges for the exact amount of time used. Answer the following

a. Make one graph showing the cost per minute as a function of number of minutes and the other showing the total cost for calls as a function of the number of minutes up to 100 min.

b. If you connect the points in the secong graph in part (a), what kind of assumptions needs to be made about the way the telephone company charges phone calls?

c. Why does the total cost for calls consist of two line segments? Why is one part steeper than the other?

d. The function representing the total cost for calls as a function of number of minutes talked can be represented by two equations. Write these equations.

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Chapter 8 Solutions

A Problem Solving Approach to Mathematics for Elementary School Teachers (12th Edition)

Ch. 8.1 - Use the fact that each prime in the prime...Ch. 8.1 - Find the value of 3 on a calculator. Explain why...Ch. 8.1 - Is it true that a+b=a+b for all a and b? If not,...Ch. 8.1 - The number 227 can be written as an infinite...Ch. 8.1 - a. Use the fact that if a prime p appears in the...Ch. 8.1 - Without using a calculator, order the following....Ch. 8.1 - a. To prove that 2335 a student wrote the...Ch. 8.1 - The sequence 1,1.01,1.001,1.0001,... is an...Ch. 8.1 - Let each number of a group choose a number between...Ch. 8.1 - Prob. 11MC
Ch. 8.1 - Connecting Mathematics to the Classroom Jim asked,...Ch. 8.1 - Connecting Mathematics to the Classroom A student...Ch. 8.1 - Prob. 14MCCh. 8.1 - A student says that she saw online that the...Ch. 8.1 - Prob. 16MCCh. 8.1 - Jose says that the equation x=3 has no solution,...Ch. 8.1 - MATHEMATICAL CONNECTIONS A student wants to know...Ch. 8.1A - Write an irrational number whose digit are 2s and...Ch. 8.1A - Use the Pythagorean Theorem to find the value of...Ch. 8.1A - Arrange the following real numbers in order from...Ch. 8.1A - Determine which of the following if any represent...Ch. 8.1A - If possible, find the each of the following...Ch. 8.1A - Find the Approximate square root of each of the...Ch. 8.1A - Classify each of the following statements as true...Ch. 8.1A - Find the irrational numbers between each of the...Ch. 8.1A - Based on your answer in exercise 8, argue that...Ch. 8.1A - If R is the set of real number, Q is the set of...Ch. 8.1A - ASSESSMENT The letters in the following table...Ch. 8.1A - ASSESSMENT The letters in the following table...Ch. 8.1A - ASSESSMENT Determine for what real number values...Ch. 8.1A - ASSESSMENT Write each of the following roots in...Ch. 8.1A - ASSESSMENT Write each of the following in the...Ch. 8.1A - Prob. 16ACh. 8.1A - ASSESSMENT The expression 21016t approximates the...Ch. 8.1A - Prob. 18ACh. 8.1A - ASSESSMENT In each of the following, find all real...Ch. 8.1A - ASSESSMENT Write an equation in x not involving...Ch. 8.1A - Prob. 21ACh. 8.1A - ASSESSMENT Determine which of the following are...Ch. 8.1B - Prob. 1ACh. 8.1B - Prob. 2ACh. 8.1B - Prob. 3ACh. 8.1B - Prob. 4ACh. 8.1B - Prob. 5ACh. 8.1B - Prob. 6ACh. 8.1B - Prob. 7ACh. 8.1B - Prob. 8ACh. 8.1B - If R is the set of real numbers, Q is the set of...Ch. 8.1B - The letters in the table correspond to the sets...Ch. 8.1B - Prob. 12ACh. 8.1B - Prob. 13ACh. 8.1B - Prob. 14ACh. 8.1B - Prob. 15ACh. 8.1B - Prob. 17ACh. 8.1B - Prob. 18ACh. 8.1B - In each of the following, find all real numbers x...Ch. 8.1B - Prob. 20ACh. 8.2 - Student were asked to write an algebraic...Ch. 8.2 - a. Choose seven consecutive term in any arithmetic...Ch. 8.2 - A teacher instructed her class as follows: Take...Ch. 8.2 - A teacher instructed her class to take any number...Ch. 8.2 - Give an example of geometric sequence whose first...Ch. 8.2 - Prob. 6MCCh. 8.2 - Prob. 7MCCh. 8.2 - A student wonders if sets can ever be considered...Ch. 8.2 - A student thinks that if A and B are sets, then...Ch. 8.2 - A student wants to know how can she prove that a...Ch. 8.2 - Prob. 11MCCh. 8.2 - Prob. 12MCCh. 8.2 - Prob. 13MCCh. 8.2 - Prob. 14MCCh. 8.2 - Find all integers n such that n503n+1.Ch. 8.2 - Prob. 1NAEPCh. 8.2 - 2+n 5 3+n 6 4+n 7 5+n 8 What number does n...Ch. 8.2 - A. If c and d are different prime numbers less...Ch. 8.2A - Translate the following phrases into algebraic...Ch. 8.2A - Prob. 2ACh. 8.2A - In the tile pattern sequence of figures shown,...Ch. 8.2A - In the following descriptions, write an expression...Ch. 8.2A - In a college, there are P professors and S...Ch. 8.2A - Suppose a class has g girls and b boys, and there...Ch. 8.2A - Ryan is building matchstick sequences as shown....Ch. 8.2A - Prob. 8ACh. 8.2A - For a particular event, a student pays 5 per...Ch. 8.2A - Prob. 10ACh. 8.2A - In each of the following arithmetic sequences,...Ch. 8.2A - Prob. 12ACh. 8.2A - Find the first term and the difference in an...Ch. 8.2A - Prob. 14ACh. 8.2A - A ball is dropped from a height of 10 ft and...Ch. 8.2A - Jake bought contact lenses and was told to wear...Ch. 8.2A - In a Fibonacci-like sequence, the first term is 2,...Ch. 8.2B - Translate the following phrases into algebraic...Ch. 8.2B - Prob. 2ACh. 8.2B - Discover a possible tile pattern in the following...Ch. 8.2B - In the following descriptions, write an expression...Ch. 8.2B - Prob. 5ACh. 8.2B - Suppose there are c chairs and t tables in a...Ch. 8.2B - Prob. 7ACh. 8.2B - Prob. 8ACh. 8.2B - For a particular event, students pay d per ticket...Ch. 8.2B - Matt has twice as many as stickers as David. If...Ch. 8.2B - Prob. 11ACh. 8.2B - Prob. 12ACh. 8.2B - Prob. 13ACh. 8.2B - Prob. 14ACh. 8.2B - A ball is dropped from a height of 20 meters and...Ch. 8.2B - Consider the following arithmetic sequences....Ch. 8.3 - Students were asked to find three consecutive...Ch. 8.3 - Prob. 2MCCh. 8.3 - Prob. 3MCCh. 8.3 - Prob. 4MCCh. 8.3 - Create an equation with x on both sides of the...Ch. 8.3 - Prob. 6MCCh. 8.3 - Prob. 7MCCh. 8.3 - Prob. 8MCCh. 8.3 - Prob. 9MCCh. 8.3 - Prob. 10MCCh. 8.3 - Prob. 11MCCh. 8.3 - Prob. 12MCCh. 8.3 - Prob. 13MCCh. 8.3 - Prob. 14MCCh. 8.3 - Prob. 15MCCh. 8.3 - Write an algebraic equation relating the variables...Ch. 8.3 - a. Show that the sum of every three consecutive...Ch. 8.3 - Prob. 18MCCh. 8.3 - Prob. 19MCCh. 8.3 - Prob. 1NAEPCh. 8.3 - Prob. 2NAEPCh. 8.3A - Consider the balances: What is the value of each...Ch. 8.3A - Solve each of the following if x is a real number....Ch. 8.3A - Ryan is building a matchstick square sequences so...Ch. 8.3A - For a particular event, 812 tickets were sold for...Ch. 8.3A - An estate of 486,000 is left to three siblings....Ch. 8.3A - A 10 ft board is to be cut into three pieces, two...Ch. 8.3A - Prob. 7ACh. 8.3A - Miriam is 10 years older than Ricardo. Two years...Ch. 8.3A - In a college, 20 times as many undergraduate...Ch. 8.3A - A farmer has 1200 yd of fencing to enclose a...Ch. 8.3A - The sum of three consecutive terms in the...Ch. 8.3A - Prob. 12ACh. 8.3B - Consider the following balances: a. Which shape...Ch. 8.3B - Prob. 2ACh. 8.3B - Prob. 3ACh. 8.3B - Prob. 4ACh. 8.3B - Prob. 5ACh. 8.3B - Prob. 6ACh. 8.3B - Prob. 7ACh. 8.3B - Prob. 8ACh. 8.3B - Prob. 9ACh. 8.3B - Prob. 10ACh. 8.3B - Prob. 11ACh. 8.3B - Prob. 12ACh. 8.4 - Prob. 1MCCh. 8.4 - Prob. 2MCCh. 8.4 - If S is the set of students in Ms. Carmels class,...Ch. 8.4 - Answer the following about f(x)=2x, an exponential...Ch. 8.4 - Prob. 6MCCh. 8.4 - Prob. 9MCCh. 8.4 - Prob. 10MCCh. 8.4 - Prob. 11MCCh. 8.4 - Prob. 12MCCh. 8.4 - Prob. 13MCCh. 8.4 - Prob. 16MCCh. 8.4 - Prob. 17MCCh. 8.4 - Prob. 18MCCh. 8.4 - Prob. 19MCCh. 8.4 - Prob. 20MCCh. 8.4 - Prob. 21MCCh. 8.4 - Prob. 22MCCh. 8.4 - Prob. 23MCCh. 8.4 - Prob. 24MCCh. 8.4 - Prob. 25MCCh. 8.4 - Prob. 1NAEPCh. 8.4 - Prob. 2NAEPCh. 8.4 - Prob. 3NAEPCh. 8.4A - Prob. 1ACh. 8.4A - Which of the following are function from the set...Ch. 8.4A - a. Draw an arrow diagram of a function with domain...Ch. 8.4A - Suppose f(x)=2x+1 and the domain {0,1,2,3,4}....Ch. 8.4A - Prob. 5ACh. 8.4A - a. Make an arrow diagram for each of the...Ch. 8.4A - The dosage of a certain drug is related to the...Ch. 8.4A - For each of the following, guess what might be...Ch. 8.4A - Quick-Talk advertises monthly cellualr...Ch. 8.4A - For each of the following sequenceseither...Ch. 8.4A - Consider the following two function machines. Find...Ch. 8.4A - In problem 11, find the all inputs for which the...Ch. 8.4A - a. Repeat exercise 11 when the bottom machine...Ch. 8.4A - Consider the function f(x)=x+b, where b is a...Ch. 8.4A - Let t(n) represent the nth term of a sequence for...Ch. 8.4A - Prob. 16ACh. 8.4A - Consider a function machine that accepts inputs as...Ch. 8.4A - The following graph shows the relationship between...Ch. 8.4A - A ball is shot out of a cannon at ground level....Ch. 8.4A - Prob. 20ACh. 8.4A - Prob. 21ACh. 8.4A - Which of the following equations or inequalities...Ch. 8.4A - Which of the following are graphs of fucntions and...Ch. 8.4A - Prob. 24ACh. 8.4A - Prob. 25ACh. 8.4A - Prob. 26ACh. 8.4B - Prob. 1ACh. 8.4B - Prob. 2ACh. 8.4B - Prob. 4ACh. 8.4B - Prob. 5ACh. 8.4B - Prob. 6ACh. 8.4B - Prob. 7ACh. 8.4B - Prob. 8ACh. 8.4B - Prob. 9ACh. 8.4B - Prob. 10ACh. 8.4B - Prob. 11ACh. 8.4B - In problem 11, find the all inputs for which the...Ch. 8.4B - Prob. 13ACh. 8.4B - Prob. 14ACh. 8.4B - Prob. 15ACh. 8.4B - Prob. 16ACh. 8.4B - Prob. 17ACh. 8.4B - Prob. 18ACh. 8.4B - Prob. 19ACh. 8.4B - Prob. 20ACh. 8.4B - Assume the pattern continues for each of the...Ch. 8.4B - Prob. 22ACh. 8.4B - Prob. 23ACh. 8.4B - Prob. 24ACh. 8.4B - Prob. 25ACh. 8.4B - Prob. 26ACh. 8.4B - Prob. 27ACh. 8.5 - In this chapter, an arithmetic sequence was...Ch. 8.5 - Prob. 2MCCh. 8.5 - Prob. 3MCCh. 8.5 - Prob. 4MCCh. 8.5 - Prob. 5MCCh. 8.5 - Prob. 6MCCh. 8.5 - Prob. 7MCCh. 8.5 - Prob. 8MCCh. 8.5 - A student would like to know why it is impossible...Ch. 8.5 - Prob. 12MCCh. 8.5 - Prob. 13MCCh. 8.5 - Janis noticed that in the simultaneous equations...Ch. 8.5 - Prob. 15MCCh. 8.5 - Prob. 16MCCh. 8.5 - Prob. 17MCCh. 8.5 - Prob. 18MCCh. 8.5 - Prob. 19MCCh. 8.5 - Prob. 20MCCh. 8.5 - Prob. 1NAEPCh. 8.5 - Prob. 2NAEPCh. 8.5A - The graph of y=mx is given in the following...Ch. 8.5A - Prob. 2ACh. 8.5A - Find the x-intercept and y-intercept for the...Ch. 8.5A - In the following figure, part i shows a dual-scale...Ch. 8.5A - Write each of the following equations in...Ch. 8.5A - For each of the following, write the equation of...Ch. 8.5A - Find the coordinates of two other collinear points...Ch. 8.5A - Prob. 8ACh. 8.5A - Prob. 9ACh. 8.5A - Find the equation for each of the following lines....Ch. 8.5A - For each of the following, find the slope, if...Ch. 8.5A - Write the equation of each line in exercise 11....Ch. 8.5A - Prob. 13ACh. 8.5A - The lines AB and BC shown in the figure are graph...Ch. 8.5A - What do the graphs of the following equations have...Ch. 8.5A - Suppose a car is travelling at constant speed of...Ch. 8.5A - Solve each of the following systems, if possible....Ch. 8.5A - The owner of a 5000-gal oil truck loads the truck...Ch. 8.5A - Josephines bank contains 27 coins. If all the...Ch. 8.5B - Prob. 2ACh. 8.5B - ASSESSMENT 8-4B Find the x-intercept and...Ch. 8.5B - Prob. 4ACh. 8.5B - Prob. 5ACh. 8.5B - Prob. 6ACh. 8.5B - ASSESSMENT 8-4B Find the coordinates of two other...Ch. 8.5B - Prob. 8ACh. 8.5B - Prob. 9ACh. 8.5B - ASSESSMENT 8-4B Find the equation for each of the...Ch. 8.5B - ASSESSMENT 8-4B For each of the following, find...Ch. 8.5B - ASSESSMENT 8-4B Write the equation of each line in...Ch. 8.5B - Prob. 13ACh. 8.5B - Prob. 14ACh. 8.5B - Prob. 15ACh. 8.5B - Prob. 16ACh. 8.5B - Solve each of the following systems, if possible....Ch. 8.CR - Chapter 7 Review Classify each of the following as...Ch. 8.CR - Prob. 2CRCh. 8.CR - Chapter 7 Review Answer each of the following and...Ch. 8.CR - Prob. 4CRCh. 8.CR - Approximate 23 to two decimal places by using the...Ch. 8.CR - Each of the following is a geometric sequence....Ch. 8.CR - Prob. 7CRCh. 8.CR - Prob. 8CRCh. 8.CR - There are 13 times as many students as professors...Ch. 8.CR - Prob. 10CRCh. 8.CR - Write an equation to find the number of feet given...Ch. 8.CR - The sum of n whole numbers is S. If each number is...Ch. 8.CR - I am thinking a whole number. If I divide it by...Ch. 8.CR - a. Think of a number. Add 17. Double the result....Ch. 8.CR - Find all the values of x that satisfy the...Ch. 8.CR - Mike has 3 times as many baseball cards as Jordan,...Ch. 8.CR - Jeannie has 10 books overdue at the library. She...Ch. 8.CR - Three children deliver all the newspapers in a...Ch. 8.CR - Which of the following sets of ordered pairs are...Ch. 8.CR - Prob. 20CRCh. 8.CR - Prob. 21CRCh. 8.CR - Prob. 22CRCh. 8.CR - Prob. 23CRCh. 8.CR - Prob. 24CRCh. 8.CR - Prob. 25CRCh. 8.CR - Graph each of the following equations: a. y=-2x+5...Ch. 8.CR - Prob. 27CRCh. 8.CR - Prob. 28CRCh. 8.CR - Prob. 29CRCh. 8 - Prob. 1NTCh. 8 - Prob. 2NTCh. 8 - Prob. 4NTCh. 8 - Prob. 5NTCh. 8 - Prob. 6NTCh. 8 - NOW TRY THIS Solve the Newspaper Delivery problem...Ch. 8 - NOW TRY THIS Determine which of the following are...Ch. 8 - Prob. 9NTCh. 8 - Prob. 10NTCh. 8 - Prob. 11NTCh. 8 - NOW TRY THIS a. Use the slope formula to find the...Ch. 8 - Prob. 13NT

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