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# Desperately Need Help With My MAth Homework

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**9**replies

**3**views Edited

**Nov 19, 2006**

ok were doing this worksheet for homework and i suck at math so i need some help, here are some questions. and its going to be handed in so i need right answers thank yiou

the coordinates of the vertex of the graph of y = 2xsquared - 4x +1 are??? and its multiple choice so here are the answers (1, -1) (1,1) (-1,5) (2,1)

The graphs of the equation y = xsquared and x= -3 will intersect in???

1 point 2 points 3 points or 0 points?

## Re: Desperately Need Help With My MAth Homework

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Nov 19, 2006

C_Wolf wrote:graph them on a $130 calulator

LMAO!! Wow, I honestly don't eve remeber doing that stuff in Math class. LMAO!!

but he is right,

## Re: Desperately Need Help With My MAth Homework

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Nov 19, 2006

i accidently left it in school because my chem teacher wont let us use agraphing calculator in her class but i have to use one for math so i dont carry around 2 all day i put one in my locker and i forgot to take it out

Keyblade Wielder

Registered: 08/01/2004

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## Re: Desperately Need Help With My MAth Homework

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Nov 19, 2006

animefreak111 wrote:ok were doing this worksheet for homework and i suck at math so i need some help, here are some questions. and its going to be handed in so i need right answers thank yiouthe coordinates of the vertex of the graph of y = 2xsquared - 4x +1 are??? and its multiple choice so here are the answers (1, -1) (1,1) (-1,5) (2,1)The graphs of the equation y = xsquared and x= -3 will intersect in???1 point 2 points 3 points or 0 points?

To find the vertex of a parabola, you do -b/2a for the x coordinate, and then plug the number you get back into the equation and solve for y.

You don't even need to do any number crunching for the second one. Think about what y=x^2 is and what x = -3 is. y=x^2 is a function, which means it passes the vertical line test. x=-3 is a vertical line, so at most it can intersect the parabola once. Parabolas also have a domain of all real numbers, so x=-3 will intersect the parabola once.