Question

It cost $0.25 to use a dryer at a laundromat for 15 minutes. The expression

0.25m ÷ 15

represents the cost, in dollars, of using a dryer for m minutes. What is the cost to use the dryer for 120 minutes?

Answer 1

`\Large\boxed{\tt Answer:~2 ~dollars}`

`\tt Step-by-step~explanation:`

See how many times 15 can go into 120.

`\tt (120)/(15) =8`

If 15 • 8 is 120, then the cost would have to multiply by 8.

`\tt 0.25*8= 2`

It costs $2.00 to use the dryer for 120 minutes.

We can also use the equation to help. We plug in 120 for m and solve.

`\tt 0.25(20)=30\\30 / 15 = 2`

We still end up with the same result: $2.00 for 120 minutes.