Question 135012This question is from textbook
: Chapter Title: Classic Puzzles in Two Variables
A grocery store sells a mixture of peanuts and raisins for $1.75 per pound. If peanuts cost $1.25 per pound and raisins cost $2.75 per pound, what amount of raisins and peanuts go into 1 pound of the mixture?
How do I set up my two equations?
p+r=
125p+275r=
This question is from textbook
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A grocery store sells a mixture of peanuts and raisins for $1.75 per pound. If peanuts cost $1.25 per pound and raisins cost $2.75 per pound, what amount of raisins and peanuts go into 1 pound of the mixture?
Quantity equation: p+r= 1 lb.
Value equation: 125p+275r= 175*1 (this equation is in cents)
--------------------------
p = 1-r
125(1-r)+275r = 175
125-125r+275r = 175
150r = 50
r = 1/3 lb (amount of raisins in the mixture)
p = 1-r = (2/3) lb (amount of peanuts in the mixture)
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Cheers,
Stan H.
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