How many pounds of nuts selling for $6 per pound and pounds of raisins selling for $3 per pound should Kurt combine to obtain 120 pounds of trail mix that cost him $5 per pound?

Respuesta :

Answer:

80 pounds of nut sold and 40 pounds of raisins sold.

Step-by-step explanation:

Let x be the number of pounds of nut sold and y be the number of pounds of raisins sold.

Combine weight of trail mix is 120 pounds.

[tex]x+y=120[/tex]                   .... (1)

Nuts selling for $6 per pound and pounds of raisins selling for $3 per pound. The cost of trail mix is $5 per pound.

[tex]6x+3y=5\times 120[/tex]

[tex]6x+3y=600[/tex]

Divide both sides by 3.

[tex]2x+y=200[/tex]                    ..... (2)

Subtract equation (1) from equation (2).

[tex]2x+y-(x+y)=200-120[/tex]

[tex]2x+y-x-y=80[/tex]

[tex]x=80[/tex]

The value of x is 80.

Put this value in equation (1).

[tex]80+y=120[/tex]

Subtract 80 from both sides.

[tex]80+y-80=120-80[/tex]

[tex]y=40[/tex]

The value of y is 40.

Therefore, 80 pounds of nut sold and 40 pounds of raisins sold.