Wow this is a good question whatttt
12x+28 is the simplified expression
If i understood the question right, you're trying to find the value when h = -2. If that's true so here is how it's done:

Answer:
Step-by-step explanation:
The volume of a rectangular prism is
V=xyz, where x,y,z are the dimensions. (I don’t know where you got the faulty V=Bh)
V=3.2(5)9
V=144in^3
Answer: 54°
Step-by-step explanation:
We can see that this triangle is a right triangle (look at the little square in the triangle's corner-- that tells us that it's a right angle). A right angle is 90°
A triangle always has 180° in total.
So, we can add 90° and 36° and subtract the sum from 180°
180° - (90° + 36°) = 180° - 126° = 54°