Sergey is solving 5x2 + 20% – 7 = 0. Which steps could he use to solve the quadratic equation by completing the
square? Select three options.
5(x2 + 4x + 4) = -7 + 20
X+2 = + 27
5(x2 + 4x) = 7
5(x2 + 4x + 4) = 7 + 20
5(x2 + 4x) = -7

Step-by-step explanation:

we have

step 1

Group terms that contain the same variable, and move the constant to the opposite side of the equation

step 2

Factor 5 left side

step 3

Complete the square

step 4

Rewrite as perfect squares

step 5

step 6

answer: b

step-by-step explanation:

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh