8x+54x+140 where x is the number of $1 increases in prices

In which form is the following function written? y = - 2(x – 3)(x + 5)

Given right triangle a w/a hypotenuse length of x+4 and a leg of x, and right triangle b, w/ a hypotense length of 3y and a leg length of y+4 for what values of x and y are the triangles congruent by hl?

Based on the diagrams, what is the value of x?