Answer:
The shaded are is 
Step-by-step explanation:
we know that
The shaded area is equal to the area of the semicircle minus the area of the circle inside the semicircle
step 1
Find the area of semicircle
The area of semicircle is equal to

where
----> the radius is half the diameter
substitute

step 2
Find the area of the circle inside the semicircle
The area of circle is equal to

where
---> the radius of circle inside is half the radius of semicircle
substitute

step 3
Find the shaded area

assume


3 significant figures is

Answer:937.12
Step-by-step explanation:
I think x=10
4x=3x+10
subtract 3x from both sides and you get x=10
Answer:
Step-by-step explanation:
-4 x y-= 2