Answer:
x=11
Step-by-step explanation:
So we know that
5x+5+2x+8=90
we combine like terms
7x+13=90
subtract both sides by 13
7x=77
divide both sides by 7
the answer i the 3rd graph just did it
78
A=base*height
10*7.8
x + 3 = 2x - 7
-x = -10
x = 10
UV = 10 + 3 = 13
SU = 2 (UV) = 2(13) = 26
Answer
SU = 26 m