[tex]\Large\boxed{\tt Answer:~2 ~dollars}[/tex]
[tex]\tt Step-by-step~explanation:[/tex]
See how many times 15 can go into 120.
[tex]\tt \frac{120}{15} =8[/tex]
If 15 • 8 is 120, then the cost would have to multiply by 8.
[tex]\tt 0.25*8= 2[/tex]
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.
[tex]\tt 0.25(20)=30\\30 \div 15 = 2[/tex]
We still end up with the same result: $2.00 for 120 minutes.
