Concept explainers
To find: the price of roll of film and bottle of sunscreen.
Answer to Problem 52E
Explanation of Solution
Given:
Bill bought
Liz paid
Concept used:
In the elimination method or substitution method:
Either add or subtract equation to get an equation in one variable.
When the coefficients in one variable are opposites then add the equations to eliminate the variable and when the coefficients of one variable are equal and subtract the equation to eliminate a variable.
Calculation:
Let
Since, bill bought
Again, since, Liz paid
Now, it has to find the price of a roll of film and the price of a bottle of a sunscreen, if the price of each bottle of sunscreen is the same and the price of each roll of film is the same.
From the equation
It is substitute
Hence,
Chapter 3 Solutions
Advanced Mathematical Concepts: Precalculus with Applications, Student Edition
Additional Math Textbook Solutions
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