Answer:
D
Step-by-step explanation:

Simplify:

Rewrite in the form
:

Add
to both sides:



or 
x = -4±
x= -4±
By using a graphing calculator, the solutions are:
(-3, 4) and (1, 0)
Answer:
I think it's 9 again I think
Step-by-step explanation:
Answer:
18.4 feet
Step-by-step explanation:
-use the formula C^2 = A^2 + B^2 for a right triangle, which is made by the ladder and the wall.
-let the ladder be C, the wall be a, the base to the bottom be b.
-substitude into the equation, which will leave us with:
C^2 = 17^2 + 7^2
C^2 = 289 + 49
C^2 = 338
C = square root of 338, which is 18.4 feet!