Rich bought 5 cupcakes and one pie. He knows his total bill is $13.14 and knows the pie was $6.89. How much is the cost of one cupcake?

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

How to do this , and can some one explain

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52