SOLUTION: Goodies Club recently ran a bake sale to raise charity. Donuts were sold for $0.50 a piece and the coffee for $0.70 per person. It is known that 120 items were sold and $68 collect
Question 514493: Goodies Club recently ran a bake sale to raise charity. Donuts were sold for $0.50 a piece and the coffee for $0.70 per person. It is known that 120 items were sold and $68 collected. How many cups of coffee were sold? Answer by solver91311(24713) (Show Source):
Let be the number of donuts. Let be the number of cups of coffee. Then:
I converted dollars/cents to just cents because I don't like decimal coefficients.
Now all you have to do is solve the 2X2 system for . Hint: Solve the first equation for either variable in terms of the other and then use the substitution method.
John
My calculator said it, I believe it, that settles it