Which graph represents a quadratic function with a vertex at (0, 0)?

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

Charlie tosses five coins.what is the probability that all five coins will land tails up.