What is the standard form of (2-4i)(3+51)/(3+i)

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?

Answer pls man im trying to get out of summer school

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.