math
posted by rivul .
a local resturant sells muffins in boxes of 6, 9, and 20.
determine whether the following amounts of muffins can be purchased. number of drsired muffins 15,99, 19, 48,76

15 = 6+9
99 = 9*11
48 = 8*6
76 = 2*20 + 4*9
19 can't be made