algebra

posted by .

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 14% protein?

• algebra -

http://www.jiskha.com/search/index.cgi?query=Soybean+Meal+Is+16%25+Protein

• algebra -

Let x = amount of soybean meal used
y = amount of cormeal used

x + y = 320

.16x + .08y = .15(x + y) = .15(320) = 48

.16x + .08y = 48

That's two equation and two unknowns:
x + y = 320
.16x + .08y = 48

Multiply the first equation by .08:
.08x + .08y = 25.6
.16x + .08y = 48

Subtract the first equation from the second equation:
.16x - .08x + .08y - .08y = 48 = 25.6

.08x = 22.4

Divide by .08:
x = 280

x + y = 320

280 + y = 320

y = 40

Use 280 lbs of soybean meal and 40 lbs of cornmeal.

Similar Questions

1. Algebra

Soybean meal is 18% protein; cornmeal is 9% protein. How many pounds of each should be mixed together in order to get 360 lb mixture that is 12% protein?
2. algebra

Soybean Meal Is 16% Protein; Cornmeal Is 8% Protein. How Many Pound Of Each Should Be Mixed Together In Order To Get 320 Lb. Mixture That Is 12% Protein?
3. Math

Soybean meal is 18% protein, cornmeal is 9% protein. How many pounds of each should be mixed together in order to get a 360-lb mixture that is 10% protein?
4. algebra 1a

Soybean meal is 18% protein, cornmeal is 9% protein. How many pounds of each should be mixed together in order to get a 360-lb mixture that is 10% protein?
5. Math Algebra 1a

Soybean meal is 18% protein, cornmeal is 9% protein. How many pounds of each should be mixed together in order to get a 360-lb mixture that is 10% protein?
6. math

Soybean meal is 18% protein, cornmeal is 9% protein. How many pounds of each should be mixed together in order to get a 360-lb mixture that is 10% protein?
7. algebra

Soybean meal is 12% protein: cornmeal is 6% protein. How many pounds of each should be mixed together in order to get 240-lb. mixture that is 8% protein?
8. algebra

Soybean meal is 12% protein; Cornmeal is 6% protein. How many pounds of each should be mixed together in order to get 240lb mixture that is 8% protein?
9. Algebra

Soybean meal is 14% protein; cornmeal is 7% protein. How many pounds of each should be mixed together in order to get 280-lb mixture that is 10% protein?
10. Algebra

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 10% protein?

More Similar Questions