Which statement describes the first step to solve the equation by completing the square?

4x^2+16x=20

multiply both sides of the equation by 1/4 .

add 8 to each side of the equation.

multiply both sides of the equation by 1/8 .

add 64 to each side of the equation.

Multiply both sides of the equation by

Step-by-step explanation:

we have

Step 1

Multiply both sides of the equation by

Step 2

Complete the square. Remember to balance the equation by adding the same constants to each side

Step 3

Rewrite as perfect squares

Step 4

Square root both sides

therefore

the answer is

Multiply both sides of the equation by

answer would be 8.64 or s = 11π/4 inches

step-by-step explanation:

s = r θ  

where s = arc length  

r = radius = 3 inches  

θ = central angle in radians = ( π /180)*165  

s = 3(π/180)*165  

= 8.64 inches