Help pls its due tmr and I don't understand

A

Find all the volumes

Van: 378 ft³

Small Truck: 648 ft³

Large Truck: 1487.5 ft³

Divide the volumes by the cost

Van                     Small Truck

378 ÷ 92.50       648 ÷ 162 = 4

4$ per cubic ft   4$ per cubic ft

The small truck is the better deal because you're getting more space for the same price per cubic ft as the moving van.

B

From the volumes we calculated earlier we subtract the volumes: large truck - small truck

1487.5 ft³ - 648 ft³ = 839.5 ft³

C

The family should rent the large truck because it has 1487.5 cubic feet. That is more than enough space than they need.

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !