SOLUTION: Soybean meal is 14% protein ; cornmeal is 7% protein. How many pounds of each should be mixed together in order to get the 280lb mixture that is 13% protein? How many pounds

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Question 160385This question is from textbook Introductory and Intermediate Algebra, 3e
: Soybean meal is 14% protein ; cornmeal is 7% protein. How many pounds of each should be mixed together in order to get the 280lb mixture that is 13% protein?

How many pounds of the cornmeal should be in the mixture?
How many pounds of the soybeans meal should be in the mixture? This question is from textbook Introductory and Intermediate Algebra, 3e

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
.14X+.07(280-X)=.13*280
.14X+19.6-.07X=36.4
.07X=36.4-19.6
.07X=16.8
X=16.8/.07
X=240 POUNDS OF SOYBEAN IS USED.
280-240=40 POUNDS OF CORNMEAL IS USED.
PROOF:
.14*240+.07*40=.13*280
33.6+2.8=36.4
36.4=36.4