Concept explainers
To find:the amount of a plumber and plumbers apprentice earn.
Answer to Problem 12P
The amount of a plumber earned $168 and plumbers apprentice earned $45.
Explanation of Solution
Given information:
The plumber earned $28 per hour and the plumbers apprentice earned $15 per hours.
Also, plumber worked 3 hours more than plumbers apprentice, together they were paid the amount $213.
Calculation:
Let x be the number of hours plumber worked and y be the number of hours apprentice worked.
The plumber worked 3 hours more than plumbers apprentice worked.
Since they were paid the amount $213,
Compute the solutions of the system
Multiply the equation
Add these two equations
Divide on both sides by43,
Substitute
The amount of a plumber earned is computed as follows,
The amount of a plumber apprentice is computed as follows,
Therefore, the amount of a plumber earned $168and plumbers apprentice earned $45.
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Algebra and Trigonometry: Structure and Method, Book 2
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