Solve each of the following for x:
a. x+2=5
b. x²+2x=5x
c. x(5x−20)+2(5x−20)=5(5x−20)

a.) x = 3

b.) x = 0, 3

c.) x = 4, 3

Step-by-step explanation:

a.)

x + 2 = 5

  - 2    -2

x = 3

For b and c: Move all terms to the left side and set equal to zero. Then set each factor equal to zero.

the third picture

step-by-step explanation:

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: