Question

Soybean 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?

Answer 1

two equations
(1) 240=s+c
(2)19.2=.12s+.06c
solve

Answer 2

cornmeal@6% = 240(.08-.12)/(.06-.12)

Answer 3

amistre!!! help me with my integral

Answer 4

Please :D

Answer 5

Should i solve that substitution?

Answer 6

Can you explain this some more, please

Answer 7

ideally, youd solve the system of equations by substitution yes

a+b=t; a=t-b

ax +by=tz

(t-a)x + by = tz

tz -bx +by = tz

b(y-x) = t(z-x)

b@y = t(z-x)/(y-x)

cornmeal@6% = 240(.08-.12)/(.06-.12)

Answer 8

t-a means t-b ... typoed it :)

Answer 9

okay so i would, multiply 240 by (.08-.12) and then divide by (.06-.12)...

or divide both (.08-.12)/(.06-.12) first and then multiply by 240?

Answer 10

its the same regardless of how you go at it. You can try it out both ways and check that the answers are the same.

240 (.08-.12) 240(.08-.12)
-------- * (.08-.12) = --------- * 240 = ------------ etc
(.06-.12) (.06-.12) (.06-.12)