Question

A store sells toys in bulk. It sells wooden blocks for $5 a pound and plastic bricks for $10

a pound. How many pounds of wooden blocks and plastic bricks should be used to make a
10-pound mixture that would sell for $80?

Answer 1

9514 1404 393

Answer:

• 6 # plastic bricks
• 4 # wooden blocks

Explanation:

Let p represent the number of pounds of plastic bricks in the mix. Then the number of pounds of wooden blocks is (10-p), and the total cost is ...

10p +5(10-p) = 80

5p = 30 . . . . . . . . . subtract 50

p = 6 . . . . divide by 5; there are 6 pounds of plastic bricks in the mix

4 pounds of wooden blocks and 6 pounds of plastic bricks should be used to make a 10-lb mix worth $80.