Explain how to translate the phrase into an algebraic expression. four times the difference of eight and a number

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

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?