What is the value of x?
x+13=9
enter your answer in the box in simplest form

Identify which functions are linear or non-linear. a. f(x) = x2 + 1 b. f(x) = 2x + 5 c. f(x) = x 2 + 3 d. f(x) = 3 x + 7 e. f(x) = 4x + 10 2 - 5

If the discriminant if a quadratic equation is 4 which statement describes the roots?

X+y=-4 x-y=2 use elimination with adding and subtraction