Which are steps that could be used to solve 0 = 9(x2 + 6x) – 18 by completing the square? check all that apply. 18 + 81 = 9(x2 + 6x + 9) 18 + 9 = 9(x2 + 6x + 9) 18 + 36 = 9(x2 + 6x + 36) 11 = (x + 3)2 square root 342 = (x + 6)2 square root 99 = (x + 3)2

18 + 81 = 9(x2 + 6x + 9) and 11 = (x + 3)2

Step-by-step explanation

I took it on test

A and D      

18 + 81 = 9(x2 + 6x + 9)

and

11 = (x + 3)2

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

175

step-by-step explanation:

2 inches x 10 miles = 200 miles - 3 inches = 175