A store is having a sale on chocolate chips and walnuts. For 5 pounds of chocolate chips and 3 pounds of walnuts, the total cost is $20. For 7 pounds of
chocolate chips and 9 pounds of walnuts, the total cost is $46. Find the cost for each pound of chocolate chips and each pound of walnuts.
Cost for each pound of chocolate chips: sill

cost/lb of walnuts=$1.25

cost/lb of chocolate chips=$9.75

Step-by-step explanation:

let x=cost/lb of walnuts

let y=cost/lb of chocolate chips

3x+5y=16

6x+2y=22

6x+10y=32 (mult. eq by 2)

6x+2y=22

subtract: 8y=10

y=10/8=1.25

x=16-5y=9.75

cost/lb of walnuts=$1.25

cost/lb of chocolate chips=$9.75

b

2

−

b

b

3

+

7

b

2

+

14

b

+

6

%

−

3

b

3

+

7

b

2

+

14

b

+

6

%

step-by-step explanation: