21 less than a number, multiplied by 4, results in 108. Find the value of the unknown number.

Eli is stacking unit cubes in a box partially he pauses and says the volume is 18 how did he find the volume of the box

All identities are equations, and all equations are identities. A. True B. False

If △ABC ~ △DEF which of the following statements are correct? AB ~ EF ED ~ BA DF ~ BC BA ~ FE

Which of these numbers is classified as both real and rational 17 squared 23 squared 9 squared 2 squared

A train that is 1 mile long starts through a tunnel that is also 1mile long. The train is traveling 15 miles per hour. How long does it take for the train to get completely out of the tunnel?

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.