3 questions, 15 points pr question if someone answers these 3 questions correctly. Please help!

1: The formula v=lwh is used to calculate the volume of a rectangular prism. What is the equation solve for h?

A: Vlw=h
B: lw/v=h
C: V/lw=h
D: Vh=lw

2: What is the x=y+z solved for z?

A: x+y=z
B: x/y=z
C: y/x=z
D: x-y=z

3: In the formula rt=d, r is rate, t is time, and d id distance. What is the rate of the runner who completes 7.5 miles in 1.5 hours?

A: 11.25 mph
B: 9.0 mph
C: 6.0 mph
D: 5.0 mph