What is the mean to a math problem

Rini used a stick to draw a right triangle in the ground. The hypotenuse of her triangle is 24 inches and one of the legs is 12 inches. What is the length of the third side? Round to tenth if necessary.

Cd'cost 12.95 and tapes cost 7.95 What is the cost of 2cd's and 1tape

Expanding brackets x (4x-1)

On Monday, aka practiced guitar for 2/3 of one hour. When she finished, she practiced piano for 3/4 of one hour. How much time did Ka spend practicing instruments on Monday

Which expression is equal to 2X^2+7 (Simplify)

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.