Karri W.

asked • 02/06/14

select the x coordinate of the vertex of the parabola defined by the functions f(X)=-7X^2+3X+9. a) -7/3 ,B) 9, c) 3/14 d) -3/7

I do not know where to start when it comes to solving this equation.

3 Answers By Expert Tutors

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Steve S. answered • 02/07/14

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5 (3)

Tutoring in Precalculus, Trig, and Differential Calculus

Vivian L. answered • 02/06/14

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3 (1)

Microsoft Word/Excel/Outlook, essay composition, math; I LOVE TO TEACH

Parviz F. answered • 02/06/14

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4.8 (4)

Mathematics professor at Community Colleges

Steve S.

-3/ -14 = 7/14     ???
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02/06/14

Alex S.

Parviz ... mistake/typo in next to last line " ... -3/-14= 7/14" should be "... -3/-14" = 3/14".  Clearly a typo, C is the right answer, as you stated ... in fact, there is no choice for 7/14 or its equivalent 1/2
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02/06/14

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