Question

Kelly makes $10 more per hour than her regular pay when she is working overtime. Yesterday, she worked 8 regular hours and 4 overtime hours and earned $160.
What is Kelly's regular pay per hour?

20
10
12
16

Answer 1

4 overtime hours - regular pay + $40

Total $ earned - $160

Total hours - 12 hours (8 reg + 4 overtime)

$160 - $40 = $120

$120/12 = $10

Her regular pay is $10 per hour.

Answer 2

Let x be Kelly's regular pay

Her pay for the day can be modelled by the equation 8x + 4(x + 10) = 160

Solve for x

8x + 4x + 40 = 160
8x + 4x = 160 - 40
12x = 120
x = 10

Kelly's regular pay per hour is $10