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Mathematics 10 Online
OpenStudy (anonymous):

Metal for who can help me with these problems!

OpenStudy (anonymous):

OpenStudy (joannablackwelder):

The axis of symmetry is a line that goes vertically through the x coordinate of the vertex. So, we need to find the x coordinate of the vertex for number 1.

OpenStudy (joannablackwelder):

The easiest way to do that from this form is to use the formula -b/2a which gives the x coordinate of the vertex.

OpenStudy (joannablackwelder):

The quadratic is already in the form ax^2 + bx + c

OpenStudy (joannablackwelder):

a=-2, b=4, c=-6 Do you see how I got those numbers?

OpenStudy (joannablackwelder):

@T.Newell ?

OpenStudy (anonymous):

not really

OpenStudy (joannablackwelder):

Ok, the function is -2x^2 + 4x -6 right?

OpenStudy (anonymous):

Yes

OpenStudy (joannablackwelder):

And the form uses ax^2 + bx + c

OpenStudy (joannablackwelder):

So, a is the coefficient of the x^2 term

OpenStudy (joannablackwelder):

which is -2

OpenStudy (joannablackwelder):

b is the coefficient of the x term, which is 4

OpenStudy (joannablackwelder):

and c is the constant term, which is -6

OpenStudy (joannablackwelder):

Does that help?

OpenStudy (anonymous):

little bit but I would like you to explain the others or just give the answers and how you got them

OpenStudy (joannablackwelder):

Ok, well, I am explaining. I just want to make sure that you are following me. Because if you aren't, I am not helping you just by giving you the answers. Plus that is against the policies on this site.

OpenStudy (joannablackwelder):

I need you to put in a little effort too.

OpenStudy (anonymous):

Its a little hard too while I'm in biology class and doing math at the same time.

OpenStudy (joannablackwelder):

If you are in biology class, then you should be focusing on biology and do your math later when you can actually think about it.

OpenStudy (anonymous):

Can you then give me the answers and I can go over them after class?

OpenStudy (joannablackwelder):

No, but tag me when you are out of class and I will help you go through them then if I can.

OpenStudy (joannablackwelder):

Getting a good grade doesn't actually help you if you don't understand the material.

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