HELP PLEASE Darlene wrote this proof of the identity (x + y)^2 - (x - y)^2 = 4 xy. Which of the
following is a justification for Step 5 of her proof?

Given the following statements, which is the best

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .