Please help Book - We wear mask

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?

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

Me find the value of x each figure.