Please help asap!!please im stuck

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

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

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).