5.3.4 Practice: Modeling: Finding Parallelograms Please help (I am giving 100 points and will make brainiest)

I have attached the questions on a PDF down below

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

Find the missing dimension! need asap! tiny square is a =3025 in ²

Typically a point in a three dimensional cartesian coordinate system is represented by which of the following answers in the picture !