90 plus what number makes 215

Which algebraic expression represents "the class was divided into four equal groups"? 4 + w 4w 4 - w w/4

I am of a number. If you multiply my number by 4, add - 4 to the product, and then take 1/3 of the sum, the result is - 6. Find my number

Solve equation 2 (5k + 8) = 4 (k + 4)

A smartphone costs $180. Sales tax is 5%. what is the total cost, including tax.

Adrian said that 21.8 * 1.9 equals 41.42. Is Adrian's answer reasonable?

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.