The ratio of students to teachers is 2:3 respectively. If there are 21 teachers, how many students are there?

Peter buys a hamburger for $5.00, french fries for $3.75 and a large soda for $2.25. He hands the cashier a $5.00 food voucher and a $20.00 bill. How much change is he owed?

120 dollars is 60 percent of how many dollars

the perimeter of a rectangle is found by finding the sum of all the sides. write an algebraic expression to represent the perimeter of a rectangle with length x meters and width 4 meters shorter.

Example of a function with a domain (-∞, + ∞) and a range (-∞, + ∞)

Morgan sees 15 birds on a bird watching trip she sees 6 more birds than Shari how many birds does Shari see

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.