Answer:
9
Step-by-step explanation:
Cross Multiply: 
Simplify: 4x=36
x=9
Answer:
3600
Step-by-step explanation:
the formula to find the area of a square is:
A=a2
the formula to find the perimeter of a square is:
P=4a
hope that helps
Answer:
7)141
8)65
Step-by-step explanation:
Actually, if you notice that two of the lines are parallel, the answer is x=53!