How long does it take for $450 to double at a simple interest rate of 100%

You got a job selling magazines door-to-door. you are paid $100 per day plus $1.50 for each magazine you sell. which recursive formula models this situation?

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

Evan walked 5/8 mile to his friends house.then together they walked 7/12 mile to the movie theatre.which pair of fraction can evan use to find how far he walked in all?