Jackson can remove the shingles off of a house in 7 hours, while Martin can remove the shingles in 5 hours. How long will it

take them to remove the shingles if they work together?

The answer is t= 2 hours and 55 minutes

It will take them 2 hours and 55 minutes to remove the shingles if they work together.

Step-by-step explanation:

The together rate is the sum of each separate rate.

In this problem:

Jackson's rate is 1/7

Martin's rate is 1/5.

The together rate is 1/x, which is what we want to find.

So

So 2 hours plus 0.9167 of an hour.

An hour has 60 minutes.

0.9167*60 = 55 minutes

So it will take them 2 hours and 55 minutes to remove the shingles if they work together.

a=24; b=12

step-by-step explanation:

a/b=2: 1

a=2b

36/(1+2)=12

b=12

a=24

the radius is 2 times the diameter.

step-by-step explanation: