Answer:
y=27;y=−42
Step-by-step explanation:
33−y=6;63+y=21
y=27;y=−42
I hope this helps!
to find the hypotenuse (or the ramp in question 4) you can use the equation

with a and b being the 3 feet and 9 feet and c being the unknown (ramp).
So if you plug 3 and 9 into the equation, it looks like this.

then square them.

simplify.

take the square root of both sides.

is approx. 9.5 so the answer would be H.
The lateral area that Rachel needs to cover is 21 inches.
Angle 4 will be 54°
because angle 3 and angle 5 will add to equal 180. from that we find x=18. angle 4 and and 5 and the same so 3(18) equals 54