Una madre tiene 35 años mas que su hija y dentro de 5 años tendra el doble ¿que edad tiene cada uno?

Can someone me with this problem . show your work .

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

Evaluate cos2θ for cosθ = square root of 3/2