Answer:
a = 20
Step-by-step explanation:
The mean is calculated as
mean = 
=
= 
Then
= 27 ( multiply both sides by 5 to clear the fraction )
115 + a = 135 ( subtract 115 from both sides )
a = 20
I think x = 2, but im sorry if thats wrong
X=72 cause 180-(51+57) so 180-108 and the triangle is acute cause all of the angle measures are below 90 degrees.
So your answer is
x=72
Acute Triangle
It is obviously C. most obviously
Volume = length * width ( aka base ) * height
2 feet = 24 inches.
24*15*8=2880 inches.