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 d represent 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?
a
810 = 45d, 19 days
b. 880 = 70d-45; 21 days
c. 880 = 90d +45; 9 days
d. 880 - 45d + 70; 18 days