Solve for x.
11 = 11x

x=1

Step-by-step explanation:

To solve for x, we need to get x by itself. To do this, perform the opposite of what is being done to the equation.

11=11x

x is being multiplied by 11, so we need to divide it by 11, since the opposite of multiplication is division. Remember, everything we do to one side, has to do be done to the other.

11/11=11x/11           Divide both sides by 11 (the 11s on the right will cancel)

1=x

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: