A milling company wants to mix alfalfa, which contain 20% protein, andwheat mids,which contain 15% protein, to make cattle feed.(a) If you make a mixture of30pounds of alfalfa and20pounds of wheat mids, how many pounds of protein are in the mixture? (Hint:In the30pounds of alfalfa, there are

300.2 =6

pounds of protein.) lbs (b) Write a formula that gives the amount of protein in a mixture ofapounds of alfalfa andwpounds of wheat mids.

p(a,w) =

(c) Suppose the milling company wants to make 1000 pounds of cattle feed that contains 17% protein. How many pounds of alfalfa and how many pounds of wheat mids must be used?

alfalfa	lbs
wheat mids	lbs

3.

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MY NOTES

CRAUDCOLALG6 3.5.EX.008.MI.

PRACTICE ANOTHER

Assume that at the current exchange rate, the British pound is worth $1.65 in American dollars. You have some dollar bills and several British pound coins. There are 17 items altogether, which have a total value of$18.30in American dollars. How many American dollars and how many British pound coins do you have?

British pound coins
American dollars