Question

soybean meal is 18% protein cornmeal is 9% protein how many pounds of each should be mixed together in order to get 360 lbs mixture that is 11% protien....

Help please

Answer 1

Call each kind by a variable:
Let x be the amount of Soybean
y ---------------- cornmeal
The total amount of both kinds:
x + y = 360
The mixture:
0.18x + 0.09y = 0.11(360) = 39.6
So you solve the system of two linear equations:
x + y = 360
0.18x +0.09y = 39.6
Hint: 80 lbs of SOYBEAN and 280 lbs of CORNMEAL

Answer 2

can you solve?

Answer 3

x + y = 360
y= 360-x
subtitution : y= 360-x
0.18x +0.09*(360-x) = 39.6
0.18x-0.09x = 39.6 - 32.4
0.09x = 7.2
x = 7.2 : 0.09
x = 80
Subtitution x = 80 , find y
x + y = 360
80+y= 360
y = 360 -80
y = 280
80 lbs of SOYBEAN and 280 lbs of CORNMEAL