A bike store sells scooters at a 45% markup. If the store sells each scooter for $87 then what is the original price? A $39.15 B $47.85 $60.00 D $126.15

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Find the domain of the following expression: 1/(√x)-2

What are the triple angle formulas? is it related to double angle identities?