## anonymous 5 years ago PLEASE, can anyone help me with what to do? 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 17% protein? This makes no sense to me.

1. anonymous

ok let me write it out

2. anonymous

Oh Thank yo so much!!!

3. anonymous

call the amount of soybean x so the amount of cornmeal is $360-x$ because they have to total 360 when you add them. soybean is 18% protein so you will have is $.18\times x$ protein from the soybean and also $.09\times (360-x)$ protein from the cornmeal. you want this to be $.17\times 360$ so set them equal and solve $.18x+.09\times (360-x)=.17\times 360=61.2$

4. anonymous

i will be happy to show you how to solve this if you like. if the decimals are annoying multiply both sides by 100 to get $18x+9(360-x)=6120$ $18x+3240-9x=6120$ $9x+3240=6120$ $9x=6120-3240=2880$ $x=\frac{2880}{9}=320$

5. anonymous

if not clear let me know

6. anonymous

Thank you very much, the 320 is that the soybean or cornmeal? I am math dumb I'm sorry