Lets hope I got ANSWER right #12: Ella's grandmother sewed her a change purse. When she gifted it to her. Ella counted 23 coins already in it. Ella noticed there were only dimes and quarters worth $4.70. How many dimes were in the change purse?*​

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  7 dimes

Step-by-step explanation:

Let d represent the number of dimes. Then 23-d is the number of quarters, and the total value is ...

  0.10d + 0.25(23-d) = 4.70

  -0.15d +5.75 = 4.70 . . . . . simplify

  1.05 = 0.15d . . . . . . . . add 0.15d -4.70 to both sides

  7 = d . . . . . . . . . . . divide by 0.15

There were 7 dimes in the change purse.

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.