Carolyn makes and sells necklaces. the material to make each necklace costs
$3.20. last week she made 12 necklaces and wants to make a total profit of $54.
using the equation 12(x+3.20)=54, carolyn determined that she will make a profit of $7.70 on each necklace. which error did carolyn make?
a. the solution is the amount she should sell each necklace for, and she will make a profit of $4.50 on each necklace.
b. she should have used the equation 12(x+3.20)=54 and found that she will make a profit of $1.30 on each necklace.
c. she should have used the equation x=54-12(3.20) and found that she will make a profit of $12.40 on each necklace.
d. the solution is the amount that it costs to make each necklace, and she should add $3.20 to find that she will make a profit of $10.90 on each necklace.

A. The solution is the amount she should sell each necklace for, and she will make a profit of $4.50 on each necklace.

Step-by-step explanation:

Let x be the cost of each necklace.  She needs to subtract the cost of the materials from each necklace to get the profit.

x-3.20 is the profit on each necklace.

She sells 12 necklaces

12* (x-3.20) = 54

Divide each side by 12

12/12* (x-3.20) = 54/12

x-3.20 = 4.50

Add 3.20 to each side

x-3.20 +3.20 = 4.50 +3.20

x = 7.70

She sells the necklaces for 7.70 and makes a 4.50 profit on each necklace

The correct answer is option A

The solution is the amount she should sell each necklace for, and she will make a profit of $4.50 on each necklace.

Step-by-step explanation:

It is given that,

The material to make each necklace costs  $3.20. Last week she made 12 necklaces and wants to make a total profit of $54.

To find the selling price of necklace

Let x be the profit on each necklace.

The we can write,

12(x - 3.20)=54

x - 3.20 = 54/12 = 4.5

x = 4.5 + 3.20 = 7.7

From this we get,

the amount she should sell each necklace  =  $7.7

And she will make a profit of $4.50 on each necklace.

The correct answer is Option A.

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

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.

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