Question

Kelli and Karl each have a job. Kelli earns $20 an hour. She also receives a $100 weekly bonus. 

Kelli made a table to show how much she earns in a given week.

Hours : 0, 5, 10, 15, 20, 25, 30, 35, 40,

Weekly earnings : 100, 200, 300, 400, 500, 600, 700, 800, 900,

Karl earns $25 an hour and receives a $50 weekly bonus.

Karl made a graph to show how much he earns per hour in a given week.

How many hours will it take Kelli and Karl to earn the same amount of money?

Enter your answer below.

? Hours

Answer 1

20h+100=25h+50
20h+50=25h
50=5h
10=h
They must work 10 hours a week to earn the same amount.

Hope this helps :)

Answer 2

Equation for Kelli's earning = 20x + 100
Equation for Karl's earning = 25x + 50

Now, 20x +100 = 25x +50
25x-20x = 100-50
5x = 50
x = 10

So, your answer is 10 hours.

Hope this helps!