Question

Select the x-coordinate of the vertex of the parabola defined by the function f(x) = -7x^2 + 9x + 5.

Answer 1

well the vertex coord are:
\[V(\frac{ -b }{ 2a },\frac{ -\Delta }{ 4a })\]
so the "x" coord is:\[\frac{ -b }{ 2a }\]

Answer 2

your equation is:
\[-7x^2+9x+5\] where a=-7; b=9; c=5

Answer 3

Do you understand

Answer 4

kinda... this one has me a bit perplexed

Answer 5

why?

Answer 6

because i typed the equation in incorrectly

Answer 7

Select the x-coordinate of the vertex of the parabola defined by the function f(x) = -7x^2 + 9x + 5.

Answer 8

It was supposed to be to the second power and I believe this is were I became screwed up

Answer 9

yeah don't worry it happens

Answer 10

thanks