SOLUTION: at the food store peanuts cost two dollars per pound and raisins cost four dollars per pound. Jillian bought a 7 pound mixture of peanuts and raisins for $20. how many pounds each

Question 953949: at the food store peanuts cost two dollars per pound and raisins cost four dollars per pound. Jillian bought a 7 pound mixture of peanuts and raisins for $20. how many pounds each of peanuts and raisins were in the mixture
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
p peanuts
r raisins
7, pounds of the mixture;
r=7-p, raisins

, to account for cost, not price. The equation is all done for one variable.

This problem CAN be done using two variables, and a lesson is available for such a solution method. The method was avoided here because the focus of the question did not include PRICE of the mixture, and because the "p+r=7" problem fact could be used early to form the key equation in one variable.
RELATED QUESTIONS
A grocery store sells a mixture of peanuts and raisins for $1.75 per pound. If peanuts... (answered by checkley75)

A grocery store sells a mixture of peanuts and raisins for $1.75 per pound. Peanuts cost... (answered by josgarithmetic)

A food store makes a 11�pound mixture of peanuts, almonds, and raisins. The cost of... (answered by stanbon)

A food store a 10-lb mixture of peanuts, cashews, and raisins. Peanuts cost $1.50 per... (answered by ptaylor)

A food store makes a 9-lb mixture of peanuts, cashews, and raisins. Peanuts cost $1.50... (answered by scott8148)

A food store makes a 9-lb mixture of peanuts, cashews, and raisins. Peanuts cost $1.50... (answered by Edwin McCravy)

Chapter Title: Classic Puzzles in Two Variables A grocery store sells a mixture of... (answered by stanbon)

The Fussy Food Snack Bar makes a trail mix of peanuts and raisins. If the cost of peanuts (answered by palanisamy)

peanuts 2 dollars per pound and cashews 3.5 dollars per pound. 200 pound mix at 2.5... (answered by richwmiller)