Concept explainers
An equation and the regular price of each box of cereal
Answer to Problem 25CR
The equation is
The regular price of each box of cereal is
Explanation of Solution
Given:
Talia buys 4 boxes of cereal. She has coupons for $1.15 off the regular price of each box of cereal. After using the coupons, the total cost of the cereal is $8.40
Concept Used:
Left distributive property:
- To get rid of a number in addition from one side, subtract the same number from both sides of equal sign.
- To get rid of a number in subtraction from one side, add the same number both sides of equal sign.
- To get rid of a number in multiplication from one side, divide the same number from both sides of equal sign.
- To get rid of a number in division from one side, multiply the same number both sides of equal sign.
Rules of Addition/ Subtraction:
- Two numbers with similar sign always get added and the resulting number will carry the similar sign.
- Two numbers with opposite signs always get subtracted and the resulting number will carry the sign of larger number.
Rules of Multiplication/ Division:
- The product/quotient of two similar sign numbers is always positive.
- The product/quotient of two numbers with opposite signs is always negative.
Calculation:
In order to find the price
Let x be the price of each box of cereal and
4 times the discounted price of each box of cereal is
Thus, the equation is
Here to isolate x on left side, first use the Left distributive property and then add both sides by
Thus, the regular price of each box of cereal is
Chapter 8 Solutions
Glencoe Math Accelerated, Student Edition
Additional Math Textbook Solutions
University Calculus: Early Transcendentals (3rd Edition)
Calculus and Its Applications (11th Edition)
Single Variable Calculus: Early Transcendentals (2nd Edition) - Standalone book
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Thomas' Calculus: Early Transcendentals (14th Edition)
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