oliviavaughan01
30.10.2019 •
Mathematics
Soybean meal is 16% protein; cornmeal is 8% protein. how many pounds of each should be mixed together in order to get 320-lb mixture that is 11% protein?
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Ответ:
120 lb of soybean meal
200 lb of cornmeal
Step-by-step explanation:
S = pounds of soybean meal
C = pounds of cornmeal
S + C = 320 → C = 320 – S
0.16S + 0.08C = 0.11 × 320 = 35.2
16S + 8C = 3520
16S + 8(320 – S) = 3520
16S + 2560 – 8S = 3520
8S + 2560 = 3520
8S = 960
S = 120
C = 320 – 120 = 200
Ответ: