Question 1152731

A dairy farmer wants to mix a 55% protein supplement and a standard 25% protein ration to make 1200 pounds of a high-grade 45% protein ration. How many pounds of each should he use?
<pre>Let amount of 55% protein be F
Then amount of 25% protein = 1,200 - F
We then get: .55F + .25(1,200 - F) = .45(1,200)
.55F + 300 - .25F = 540
.55F - .25F = 540 - 300
.3F = 240
F, or amount of 55% protein to use = {{{highlight_green(matrix(1,4, 240/.3, "=", 800, lbs))}}}
Amount of 25% protein to use = {{{highlight_green(matrix(1,4, "1,200" - 800, "=", 400, lbs))}}}
That's IT!! Nothing that COMPLEX or LENGTHY!!