If x and y are vertical angles then y is always sometimes or never a right angle?

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

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