Concept explainers
a.
To find:The number of hours it took to repair the car.
a.
Answer to Problem 7E
The verbal model is −
Explanation of Solution
Given information:
The total cost of repairing a car is the sum of the amount paid for the parts and the amount paid for the labour. $78 was paid for the parts and $45 was paid for each of the labours. The total cost spend to repair the car was $168.
Calculation:
- The verbal model is-
b.
To find:The number of hours it took to repair the car.
b.
Answer to Problem 7E
The equation is -
Explanation of Solution
Given information:
The total cost of repairing a car is the sum of the amount paid for the parts and the amount paid for the labour. $78 was paid for the parts and $45 was paid for each of the labours. The total cost spend to repair the car was $168.
Calculation:
Let’s assume
Therefore,
The equation will be-
Therefore the equation is
c.
To find:The number of hours it took to repair the car.
c.
Answer to Problem 7E
It took 2 hours to repair the car.
Explanation of Solution
Given information:
The total cost of repairing a car is the sum of the amount paid for the parts and the amount paid for the labour. $78 was paid for the parts and $45 was paid for each of the labours. The total cost spend to repair the car was $168.
Calculation:
To find the number of hour took it to repair the car, solve the equation for
Therefore,
Therefore, it took 2 hour to repair the car.
Chapter 3 Solutions
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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