You have 4 black marbles, 3 green marbles and 5 red marbles in a bag. What is the probability of pulling out a black marble?

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

Which expression is equivalent to -12(3x-3/4)

The area (a) of a circle with a radius of r is given by the formula and its diameter (d) is given by d=2r. arrange the equations in the correct sequence to rewrite the formula for diameter in terms of the area of the circle.