The sum of the ages of John and Mary is 32. Four years ago, John was twice as old as Mary. Find the present age of each. Please use algebraic equations.

Mr. bernard needs to order more boxes for his 16 inch diameter “super pizza.” use 3.14 to approximate π.

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)

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