SOLUTION: A 16-ounce mixed nut product containing 13.5% peanuts is to be packaged. The packager has a three-mixed nut product containing 6%, 10%, and 50% peanut concentrations in stock. If

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A 16-ounce mixed nut product containing 13.5% peanuts is to be packaged. The packager has a three-mixed nut product containing 6%, 10%, and 50% peanut concentrations in stock. If      Log On


   



Question 1092323: A 16-ounce mixed nut product containing 13.5% peanuts is to be packaged. The
packager has a three-mixed nut product containing 6%, 10%, and 50% peanut
concentrations in stock. If the amount of 50% peanut product is to be onequarter
that of the 10% peanut product, then how much of each will be needed
to produce the desired peanut concentration?

Found 2 solutions by josmiceli, addingup:
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +a+ = ounces of 6% peanuts needed
Let +b+ = ounces of 10% peanuts needed
Let +c+ = ounces of 50% peanuts needed
-----------------------------------------
(1) +a+%2B+b+%2B+c+=+16+
(2) +%28+.06a+%2B+.1b+%2B+.5c+%29+%2F+16+=+.135+
(3) +c+=+%281%2F4%29%2Ab+
-------------------------------------
There are 3 equations and 3 unknowns, so it's solvable
(2) +.06a+%2B+.1b+%2B+.5c+=+2.16+
(2) +6a+%2B+10b+%2B+50c+=+216+
(2) +3a+%2B+5b+%2B+25c+=+108+
-------------------------------
Multiply both sides of (1) by 3%7D+and%0D%0Asubtract+%281%29+from+%282%29%0D%0A%282%29+%7B%7B%7B+3a+%2B+5b+%2B+25c+=+108+
(1) +-3a+-+3b+-+3c+=+-48+
------------------------------
+2b+%2B+22c+=+60+
+b+%2B+11c+=+30+
and
(3) +b+=+4c+
+4c+%2B+11c+=+30+
+15c+=+30+
+c+=+2+
and
+b+=+4c+
+b+=+4%2A2+
+b+=+8+
and
(1) +a+%2B+b+%2B+c+=+16+
(1) +a+%2B+8+%2B+2+=+16+
(1) +a+=+16+-+10+
(1) +a+=+6+
----------------------
6 ounces of 6% peanuts are needed
8 ounces of 10% peanuts are needed
2 ounces of 50% peanuts are needed
----------------------------------
check:
(2) +%28+.06a+%2B+.1b+%2B+.5c+%29+%2F+16+=+.135+
(2) +%28+.06%2A6+%2B+.1%2A8+%2B+.5%2A2+%29+%2F+16+=+.135+
(2) +%28+.36+%2B+.8+%2B+1+%29+%2F+16+=+.135+
(2) +2.16+%2F+16+=+.135+
(2) +2.16+=+2.16+
OK

Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
This is what will be needed:
6 oz of the 6% peanut stock, 8 oz of the 10% peanut stock, and 2 oz of the 50% peanut stock.