A restaurant catered a party for 40 people. A child’s dinner (c) cost $11 and an adult’s dinner (a) cost $20. The total cost of the dinner was $728. How many children and adults were at the party?
+36914 40 people
c = # children cost 11c
a = #adult = 40 -c cost 20 (40-c) summed = 728
11c + 20(40-c) = 728 solve for c then a = 40 - c
