She added -14
the difference between 10 and -4 is 14
since this should use addition then we add -14
(-5, 4)
You can get this by finding the vertex at -b/2a for x value and plugging in to find the y value.
Answer:

Step-by-step explanation:
Let us start by isolating x for dx = x + 9.
dx - x = x + 9 - x > dx - x = 9.
Factor out the common term of x > x(d - 1) = 9.
Now divide both sides by d - 1 >
. Go ahead and simplify.
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Now,
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Group the like terms...
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>
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Now for
.
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Now for
.
Thus we then get
.
Now we want to combine fractions.
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Expand
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Therefore
.
Hope this helps!
Because she randomly added a 72 before the 78
Answer:
-5/2
Step-by-step explanation:
7=intersect of y
-5/2=Slope