The expression (-4x + 9)^2 cannot be equal to (-4x)^2 + 9^2 because it is actually equal to the product of two factors (3 + 2sqrt x) (3- 2 sqrt x). One cannot use obviously distributive property. Hence the answer to this problem should be C. as she did not understand both perfect square trinomial and did not determine the product
300,022,000.
Don't quote me on that, I'm really not all that good at math.
<h2><em>y</em> = -3<em>x</em> + 1</h2><h2></h2><h3>y = mx + b</h3><h3>m = slope</h3><h3>b = y-intercept</h3>
Length of the window = 9ft
The length is x feet more than the height
Therefore, the height is (9-x) ft
