The owner of a grocery store wants to mix two types of candy together to make 15 lbs that he he can sell for $5.00 per lb. He wants to use chocolate candy's that he sells for $7:00 a pound and sugar candies that he sells for 2.00 per pound. How many pounds of each should the owner use.

9 pounds of chocolate and 6 pounds of sugar candies

Step-by-step explanation:

Let's define the variables:

C = pounds of chocolate candies used.

S = pounds of sugar candies used.

We know that he wants to make a total of 15lb, then:

C + S = 15

We also want that the price per pound to be equal to 5$.

This means that the price of the 15 pounds will be the same as the price of the un-mixed candies.

C*$7.00 + $2.00*S = $5.00*15

Then we have a system of equations:

C + S = 15

C*$7.00 + $2.00*S = $5.00*15

To solve this system, we need to start by isolating one of the variables, i will isolate C in the first equation:

C = 15 - S

now we can replace that in the other equation:

(15 - S)*$7.00 + $2.00*S = $5.00*15

Now we can solve this for S.

$105 - $5.00*S = $75

$105 - $75 = $5.00*S

$30 = $5.00*S

$30/$5 = S = 6

Then there are 6 pounds of sugar candy, and we can use the equation:

C + S = 15

C + 6 = 15

C = 15 - 6 = 9

There are 9 pounds of chocolate candy in the mix.

9 pounds of chocolate candies, 6 pounds of sugar candies.

Step-by-step explanation:

We can set the amount of chocolate candies to x and the amount of sugar candies to 15 - x.

Our equation is:

7x + 2(15 - x) = 5 * 15.

Simplified:

7x + 30 - 2x = 75.

x = 9.

9 pounds of chocolate candies.

15 - 9 = 6.

6 pounds of sugar candies.

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now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.

range is infinite on both x and y axis positive and negative

step-by-step explanation: