Anyone knows the answer

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

Issof claims that the scale factor is 1/2. which statement about his claim is correct

In the given triangle, ∠aed ∼ ∠ abc, ad = 6.9, ae = 7.2, de = 5.2, and bc = 10.2. find the measure of bd and ce. round your answer to the nearest tenth.