Chapter 4.6, Problem 25STP

To determine

To find: which equation is used to find the number of hours n that he worked.

Answer to Problem 25STP

The correct option is $35+80n=915$

Explanation of Solution

Given:

• An electrician charges $35 for a house call.
• Also, he charges $80 per hour for each hour worked.
• The total charge was $915 to write a new house.

Calculation:

Organize the data for the first few weeks in a table shown as follows:

Hour	Charge
0	35+80(0)=35
1	35+80(1)=115
2	35+80(2)=195

Write an equation to represent this situation.

Let n represents the number of hours. Then, the equation will be,

  $35+80n=915$

Use this equation $35+80n=915$ to find the number of hour’s n that he worked.

Hence, the correct answer is option (D) $35+80n=915$

Conclusion:

Hence, the correct answer is option (D) $35+80n=915$