Question

match the parabolas with their focuses
Focuses: (-2.75,-10), (2,11.75), (-4, -13.875), (1.25,17)

Answer 1

not all of these will be used
y=-x^2+4x+8
y=2x^2+16x+18
y=-2x^2+5x+14
y=-x^2+17x+7
y=2x^2+11x+5
y=-2x^2+6x+5

Answer 2

what did you get so far?

Answer 3

nothing, I don't even know how to begin

Answer 4

use
\(\dfrac{-b}{2a}\)

Answer 5

\(ax^2+bx+c\)

Answer 6

in the first equation, a = -1, b = 4

Answer 7

plug that into the formula to get the x coordinate of the focus, then plug the value of x into the equation to find y

Answer 8

what do you get for the first one?

Answer 9

yea here an example for the 1st one the rest shd be done the same...