SOLUTION: A baker wants to sell 40 cookies averaging $0.90 each by combining cookies selling for $0.80 each and cookies selling for $1.20 each. How many of each kind of cookie is needed?

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A baker wants to sell 40 cookies averaging $0.90 each by combining cookies selling for $0.80 each and cookies selling for $1.20 each. How many of each kind of cookie is needed?       Log On


   

Question 1041460: A baker wants to sell 40 cookies averaging $0.90 each by combining cookies selling for $0.80 each and cookies selling for $1.20 each. How many of each kind of cookie is needed?
Answer by josgarithmetic(39621) About Me  (Show Source):
You can put this solution on YOUR website!
Same as simple two part mixture problem.

u how much cheap cookies
v how much expensive cookies

system%28%280.80u%2B1.20v%29%2F40=0.90%2Cu%2Bv=40%29


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The analysis was written as a system of two equation, in two unknown variables. You can convert this into a single equation in one unknown, as done in the other example problem. Look at another example demonstrating that idea: using just one unknown variable for a two-part mixture problem