I need help bad! It’s timed so plsss help

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?

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?