Question

Use the graph of y=-x^2+4x+9 shown to solve the given equation,
-x^2+4x+9=13
x=?

Answer 1

It's very simple, simply look in the graph for what x corresponds to y=13.

Answer 2

as @Ringlum says, the graph represents the function:\[y=x^2+4x+9\]so if you find the point on the graph where y=13, then you have basically found the point that corresponds to:\[13=x^2+4x+9\]so the x coordinate of that point will be the solution to the given equation.

Answer 3

2?

Answer 4

sorry I missed a minus sign at the start

Answer 5

That's correct.

Answer 6

yes 2 is correct

Answer 7

OMG...thank you guys

Answer 8

yw