Question

Gabriela is washing cars. She charges $15 for a car wash. She paid $145 for advertising, and uses $3 worth of cleaning products on each car she washes. When will Gabriela begin to make a profit?

A) Write an inequality to model the problem.
B) Solve the inequality. Show your work.
C) Answer the question.

Answer 1

From the 13th time she washes a car ,she stars earning a profit of 12$ each time

Answer 2

Gliberia 's one time investment =145$ Now she pays 3$cleaning products each time she washes a car.Her profit each time would then be 12$, but she only starts making profit when her cost of advertising is earned /compensated. Therefore she will not make any profit till the 145/12=12th(approx) time she washes a car.From the 13th time she washes a car ,she stars earning a profit of 12$ each time! Hope you find it useful :)