David can proofread15 reports in an hour while Armando can proofread 37reports in an hour. If they have 400 reports to proofread, how much time will it take between the two of them?

Judah wants to know the height of a jungle gym. If the jungle gym casts a shadow 11.2 yards long and a? nearby monument that is 19.8 yards tall casts a shadow 33.6 yards long, then how tall is the jungle gym?

4 1/5 divided by 1 2/5

Do fish pee, if so how do they?

What equation is parallel to the line 3x+y=5

On field trips, there must be 2 chaperones for every 15 students. Which ratio correctly expresses the ratio of students to chaperones?

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.