C = 0.5x + 10
----------------------------------------------------------
Switch side :
----------------------------------------------------------
0.5x + 10 = c
----------------------------------------------------------
Take away 10 from both sides :
----------------------------------------------------------
0.5x = c - 10
----------------------------------------------------------
Multiply by 2 through :
----------------------------------------------------------
x = 2c - 20
----------------------------------------------------------
Answer : x = 2c - 20 (Answer A)
----------------------------------------------------------
If the circumference of the shield is 100.48inches, nits radius is 16 inches and the area of the front of the shield is about 803.84 square inches.
proof
circumference = 2x r x Pi implies r =<span>circumference / 2Pi=100.48/2x3.14=16
area = Pi x r²=3.14 x 16²=804.84
</span>
Maybe c not to sure hope this helps
