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Mathematics 12 Online
Nicole:

Check please? http://prntscr.com/nu3o71

Nicole:

@Vocaloid

Vocaloid:

not quite, remember that the x-coordinate of the vertex is -b/2a you probably missed a sign somewhere

Nicole:

so C?

Nicole:

or B

Vocaloid:

you also have to make sure the zeroes are 10 and 14

Nicole:

then B

Vocaloid:

it can't be B remember, the x-coordinate has to be -b/2a = 12

Vocaloid:

slow down, figure out which ones have the right x-coordinate, then factor those possibilities and see which ones give you zeroes of 10 and 14

Nicole:

so its D

Vocaloid:

yes 2x^2 - 48x + 280 ---> gives you -b/2a = -(-48)/2(2) = 12 as the x-coordinate, and (x-10)(x-14) when factored

Nicole:

got it http://prntscr.com/nu3qmh

Vocaloid:

good

Nicole:

http://prntscr.com/nu3syt

Vocaloid:

good

Nicole:

http://prntscr.com/nu3tda

Vocaloid:

good

Nicole:

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Vocaloid:

good

Nicole:

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Vocaloid:

good

Nicole:

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Vocaloid:

good

Nicole:

http://prntscr.com/nu3ynp

Vocaloid:

good

Nicole:

http://prntscr.com/nu3z1j

Vocaloid:

that's really close but (x-1) moves the function 1 unit to the right (positive value of h)

Nicole:

C*

Vocaloid:

yes

Nicole:

http://prntscr.com/nu3z53

Vocaloid:

yes good

Nicole:

http://prntscr.com/nu3zr5

Vocaloid:

good

Nicole:

http://prntscr.com/nu4028

Vocaloid:

for the first one h *does* move the graph left or right (a.k.a horizontally) second question is good

Nicole:

so true okay http://prntscr.com/nu40bz

Vocaloid:

good

Nicole:

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Vocaloid:

good

Nicole:

http://prntscr.com/nu4167

Vocaloid:

good

Nicole:

http://prntscr.com/nu41ec

Vocaloid:

check again remember cos is adjacent/hypotenuse

Nicole:

A?

Vocaloid:

good

Nicole:

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Vocaloid:

good

Nicole:

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Vocaloid:

good

Nicole:

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Vocaloid:

good

Nicole:

last one: http://prntscr.com/nu43pl

Vocaloid:

good

Nicole:

okay thanks for helping

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