Pre-Algebra

1st Edition

ISBN: 9780618800766

Author: Ron Larson, Lee Stiff, Laurie Boswell, Timothy Kanold

Publisher: Houghton Mifflin-High School

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Question

Chapter 10, Problem 11CP

To determine

To use the function notation to write an equation that gives the total charges for repairing a computer.

Expert Solution

Answer to Problem 11CP

The equation is, f(h)=50+35h

Explanation of Solution

Given:

The shop charges flat $50 plus $35 per hour spent on computer repair

Calculation:

Let, “h” be the number of hours spent on the computer repair.

Now forming an equation using function notation,

f(h)=50+35h

Where, f(h) is the total charges

H is the time spent on computer repair.

Graph:

Pre-Algebra, Chapter 10, Problem 11CP

Conclusion:

The equation is, f(h)=50+35h

ii.

To determine

How much will the shop charge if computer repair shop spent 2.5 hours on it.

ii.

Expert Solution

Answer to Problem 11CP

The computer shop will charge $ 137.5

Explanation of Solution

Given:

The shop spends 2.5 hours on the repair, equation for the charges the computer will take f(h)=50+35h

Calculation:

Substituting the value of hours in the equation,

f(h)=50+(35×2.5)f(h)=50+87.5

Hence, the charges the computer shop will take,

$ 137.5

Conclusion:

The computer shop will charge $ 137.5

iii.

To determine

How many hours did the repair shop spent on the repairing?

iii.

Expert Solution

Answer to Problem 11CP

The repair shop spent 3.5 hours in repairing.

Explanation of Solution

Given:

The repair shop charges $172.50

Calculation:

Substituting the values of charges in the equation formed,

172.50=50+35h

Shifting left-hand side value to right hand-side,

35h=172.50−3535h=122.5

Cross-multiplying the values,

h=122.535h=3.5

Conclusion:

The repair shop spent 3.5 hours in repairing.

Chapter 10, Problem 10CP

Chapter 10, Problem 12CP

Chapter 10 Solutions

Pre-Algebra

Ch. 10.1 - Prob. 1C Ch. 10.1 - Prob. 2C Ch. 10.1 - Prob. 3C Ch. 10.1 - Prob. 1E Ch. 10.1 - Prob. 2E Ch. 10.1 - Prob. 3E Ch. 10.1 - Prob. 4E Ch. 10.1 - Prob. 5E Ch. 10.1 - Prob. 6E Ch. 10.1 - Prob. 7E

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