Question

A) A plumber charges $30, plus an additional $9 an hour. You have $100 to

spend on a plumbing repair. How many hours can the plumber work in order
to stay within your budget?

Answer 1

7.8 hours

Explanation:

c = 9h + 30

C is the total cost, and h is the hours worked.

100 = 9h + 30

70 = 9h

7.8 = h

Hope that helps

Answer 2

7.78 hours

Explanation:

100 = 30 + 9x

subtract 30 from both sides

70 = 9x

divide both sides by 9

7.78 = x