Answer:
First, you need to know the general volume formula of a prism

We can think of the bottom as a triangle facing us, the height is 12.5ft
Use the formula to get
V=Sh=(4×6×1/2)×12.5=150 (
)
Your subtracting 3x from 5x: 5x-3x
This is so you only have a variable on one side
Option 1 is the correct answer
Answer:
5g-14
Step-by-step explanation:
Perimeter=12+g-26+4g=5g-14