Problem 144 of 7
A farmer wants to mix two types of feed. One costs $0.20 per pound and the other costs $0.35 per pound. How many pounds of the $0.35 feed should be mixed with 100 pounds of the $0.20 feed to get a mixture costing $0.25 per pound?. Write an equation for the mixture or weighted average and solve.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
combine parts into total or average relationship.
Hidden until you reveal it.
Weighted-average equation must preserve total amount or count.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Write total contribution divided by total amount equals average, or total contribution equals target contribution.
2. Solve for the unknown part.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Unweighted average when weights differ.