Sarah is twice as old as her youngest brother if the difference between their ages is 15 years how old is her youngest brother

how many area codes (ABC) would possible if all three could be any value 1-9?

Find the volume of the cone khan academy

How are the 4s related in 0.44

Solve for P. R = 2P + 2Q

How to estimate 20394.6

The difference between a number squared and the number.

Express the product of 2x^2+6x-8 and x+3 in standard form

Kate, Mario, Sato, and Den each use a different recipe to make trail mix. Which recipe uses a different ratio of cups of raisins to cereal than the rest? A Kate uses 3 cups of raisins for every 8 cups of cereal.

The quotient of five less than a number and 6 is - 4

Evaluate the expression below if b=4 and c = - 7. 2b - (c + b)