How does supply and demand affect consumers?
a. it controls how much we pay for goods and services,
b. it controls how we pay for goods and services.
c. it controls where we buy goods and services.

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?