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Concept explainers
a.
To write the variable expression for the tire tread depth after
a.
![Check Mark](/static/check-mark.png)
Answer to Problem 29E
The variable expression is
The table showing the tire tread depth after 1, 2, and 3 years is drawn below:
Explanation of Solution
Given information :
The tread depth of the tires of family’s new car is
Calculation :
The variable expression for the tire tread depth after
The table showing the tire tread depth after 1, 2, and 3 years is drawn below:
Hence,
The variable expression is
b.
To extend the table and find the approximate number of years the car can be driven before the tires need to be replaced.
b.
![Check Mark](/static/check-mark.png)
Answer to Problem 29E
The extended table is:
The approximate number of years to replace the tires is 7 years.
Explanation of Solution
Given information :
The tire should be replaced when the tread depth is
Calculation :
The extension of the table from part (a) is
From the table it can be observed that the tires need to be replaced after approximately 7 years.
Hence,
The approximate number of years to replace the tires is 7 years.
Chapter 5 Solutions
Pre-Algebra
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