Hailey works at a gift shop after school. she is paid $10 per hour plus 15% commission on merchandise she sells. select an equation that represents her earnings in a week if she sold $550 worth of merchandise. select one:
a. y= 10x+535, where x =number of hours worked
b. y= 10x+82.5, where x =number of hours worked
c. y= 10x+522.5,where x =merchandise sold
d. y= 0.15x+10, where x =merchandise sold