Can someone help me and please do not put a dum answer. I need a proper answer. I can not fail this exam

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?

Consider the function f(x)=-5x+3 what is f(-2)

Піf x = y and y= z, which statement must be true? оа. -x = -2 b. x= z ос. —x = 2 od. 2= x