Question

A storekeeper wants to mix two types of flour to get 300 pounds, so he can sell it by 2.50$ per pound. If he uses flour worth $2.40 a pound with another flour worth $3.00 a pound, how many pounds of each does he use?

Answer 1

Answer:

• 250 pounds cheap flour
• 50 pounds expensive flour

Step-by-step explanation:

Let x represent the quantity of the more expensive flour. Then 300-x is the quantity of the less expensive flour. The total cost of the mix is ...

  3.00x +2.40(300-x) = 2.50(300)

  0.60x = 300(0.10) . . . . . simplify, subtract 2.40(300)

  x = 300/6 = 50 . . . . . . . . divide by 0.60. Quantity of expensive flour

  300-x = 250 . . . . quantity of cheaper flour

He should use 250 pounds of $2.40 flour, and 50 pounds of $3.00 flour.