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Concept explainers
Write a real − world problem that uses the expression with two variables.
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Answer to Problem 42HP
Kate needs to read
Explanation of Solution
Given:
Write an algebraic expression that has two different variables and two different operations: addition, subtraction, multiplication or division. Then write a real − world problem that uses the expression.
Write a real − world problem that uses the expression with two variables.
Concept Used:
To set up or model a linear equation to fit a real-world application, we must first determine the known quantities and define the unknown quantity as a variable. Then, we begin to interpret the words as mathematical expressions using mathematical symbols.
When dealing with real-world applications, there are certain expressions that we can translate directly into math.
Calculation:
Kate has to read two books over her 72 − day summer vacation. Her plan is to read the same number of pages each day.
First, Kate should decide on her variables. She doesn't know the number of pages in either book, so she will need two variables.
Let
Let
Next, write a variable expression using
In total Kate will have to read
This means she should divide the total number of pages by 72 to find out how many pages she needs to read each day.
Her expression is
The answer is Kate needs to read
Thus, Kate needs to read
Chapter 1 Solutions
Glencoe Math Accelerated, Student Edition
Additional Math Textbook Solutions
University Calculus: Early Transcendentals (4th Edition)
Calculus: Early Transcendentals (3rd Edition)
Calculus: Early Transcendentals (2nd Edition)
Precalculus
Calculus and Its Applications (11th Edition)
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