Which phrase best defines a trapezoid?

a. congruent diagonals

b. exactly one pair of parallel sides

c. exactly two congruent sides

d. no sides congruent

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

Factor the polynomial 4x4 – 20x2 – 3x2 + 15 by grouping. what is the resulting expression? (4x2 + 3)(x2 – 5) (4x2 – 3)(x2 – 5) (4x2 – 5)(x2 + 3) (4x2 + 5)(x2 – 3)

The graph is supposed to show f(x) = 3 sin (x/4+1) - 1/2. which of the following are correctly represented in the graph? select two of the following that apply.