What is the degrees of a right triangle

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.