Which operation is performed in the derivation of the
quadratic formula moving from Step 6 to Step 7?
Two of the steps in the derivation of the quadratic
formula are shown below.
Step 6:
-40C
40
subtracting b from both sides of the equation
2a
Step 7: IVb2-4ac
=X+
2a
20
squaring both sides of the equation
taking the square root of both sides of the equation
taking the square root of the discriminant

b) the dogs need to shift their focus to human scent.

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.