Identify the solution(s) of the system of equations, if any.
-2x - 2y = 4
8y = -8x - 16

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Three times the sum of a number and seven is negative thirty-six. what is the number?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0