Amanda is 4 year older than Caroline. David is 2 years less than double Amanda's age. Kene is 12 years younger than David. Together these four are 136 years old. How old is each person?

What is the least common multiple of 10, 98, and 7

A jar contains red, white, and blue marbles. One-fifth of the marbles are red and one-fourth of the marbles are white. THere are 20 red marbles in the jar. HOw many blue marbles are in the jar?

5x+7y=-11 and 5x-3y=19 solve by elimination

What is "a number that is at least 90"

What is the greatest product of a 2-digit number multiplied by a 1-digit number

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.