The combined age of john and mary is 20 years. in 2 years, john will be five times as old as mary. how old is john at this time?

What phrase describes the algebraic expression r over 9

Factor the expression below x^2 - 81 A. (x + 9) (x - 9) B. (x - 9) (x - 9) C. (x + 27) (x - 3) D. (x - 27) (x - 3)

What is the volume of a sphere that has a radius of 12 mm?

X - 21 = 6 Solve the equation.

To the nearest hundredth, how many cm are 10 in? (1 in=2.54 cm) a) 24.5 cm b) 25.40 cm c) 245.40 d) 254.40 cm

I got this question that says to Complete the table for the given rule. and that is y=5x and it says (the chart has only numbers under y so you have to find what number x is) What number is x for 4 and 2 X Y 0 5 0 4 0 2

Ari is arranging her coin collection. She has 11 pennies, 5 nickels, 8 dimes, 7 quarters, and 9 half-dollars. If she chooses one at random, what is the probability that it is a penny?

Dana can travel 9 miles in her rowboat in 6 hours against the current. With the current, it takes 4 hours to row the same distance.

A local hamburger shop sold a combined total of 566 hamburgers and cheeseburgers on Saturday. There were 66 more cheeseburgers sold than hamburgers. How many hamburgers were sold on Saturday? ... ?

Find the GCF of 38m and 57n ... A) 9mn. B) 19mn. C) 19