How many pounds of candy worth $12 per pound should be mixed with candy costing $19 per pound to produce a 70 pound mixture that sells for $15 per pound?

40 pounds

Step-by-step explanation:

Given: Cost of a candy = per pound

           Cost of candy

           Total amount of mixture of be produced =

           Selling price of mixture =

Let´s x be the amount of to be mixed in the mixture.

∴ Cost of in the mixture = 12x

Next, Cost of in the mixture =

And we know the cost of final mixture =

Now, putting all the value in the equation

⇒

⇒

⇒

∴

∴ 40 pounds of candy worth $12 per pound to be mixed in the mixture.

correct answer:

b.(19,-2)