posted by Donna on .
I have a problem that I need help with can someone show me the steps
Soybean meal is 16% protein and corn meal is 9% protein. How many pounds of each shoul be mixed to get a 350-lb mixture that is 12% protein?
Why do i never get any help
let the amount of 16% mix to be added be x lb
let the amount of 9% mix to be added be 350-x lb
.16x + .09(350-x) = .12(350)
multiply by 100
16x + 9(350-x) = 12(350)
16x + 3150 - 9x = 4200
7x = 1050
x = 150
then 350-x = 200
They should use 150 lb of the 16% mix and
200 lb of the 9% mix