Me on 13 14 15 a chart is in the corner

What is the base of 1/9 to the power of 2

Find the distance between (7,-6) and (-3,-9)

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?