What is the maximum amount of variables in a exponential equation

A. 1

B. 2

C. 3

D. 0

42 is 87.5% of what number

A students finish eight of her homework problems in class. if the ratio of problems she finished to problems is still had left was 4 to 1 how many homework problems she have total

The pet store has 54 birds. There are 9 birds in each cage. How many cages are in there? Show work

How do I show an expression that shows how to cut a ribbon that's 1'1/4feet into equal sizes pieces

8x^3y+x^2-14z-2+5y^2x in standard form

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.