The following week they gave another exam. Tina knows she can grade 60 exams in 2 hours and Renee can grade 60 exams in 1.5 hours. How long will it take for them to grade all 60 exams
working together?

1 1/6 hours

Step-by-step explanation:

Add them together 2 + 1.5 = 3.5

Multiply them together 2 x 1.5 = 3

Take first number and divide by 2nd 3.5 / 3 = 7/6 or 1 1/6 hours

it could 14.28 but if its not that one then it has to be the 17 one. hope this ! : )

step-by-step explanation:

part 1 answer = 8

part 2 answer = 72

step-by-step explanation:

part 1 explanation = add all of the numbers, then divide by how many numbers you have. so, 200/25 = 8.

part 2 explanation = not gonna lie, this is hard to explain, so just google how to do it.