Samantha sends her son Barry, to a preschool center on certain days. The cost of preschool is $45 per day along with a fixed monthly charge
of $70. Last month Samantha paid a total of $880 to the preschool center. Let drepresent the number of days Barry spent at the preschool
center last month
Which equation represents this situation, and how many days did Barry attend preschool last month?