If 8+x* = 57, then x = ?

Why do interests rates on loans to be lower in a weak economy than in a strong one

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125