Question

algebra help

Answer 1

like how in y = mx + b
b = y-intercept
in y= -4x^2 + 8x + 3
^ would be the y-intercept

Answer 2

vertex form... ... ... y = m(x-h)^2 + k
y = -x^2 + 2x + 5
= -(x^2 - 2x - 5)
= -(x^2 - 2x + 1 - 1 - 5)
= -(x^2 - 2x + 1) + 6
= -(x-1)^2 + 6
^ ^ so (1, 6)

Answer 3

crosses the x-axis at x = -6 and x= 2
because slope is 1/2 it is fat

Answer 4

slope is 1/2 therefore it is fatter

Answer 5

vertex is (3, 6)

Answer 6

nope
vertex is (3, 6)

Answer 7

A would be correct :)

Answer 8

A

Answer 9

because vertex is (3, -6)
and plugged in point (0, 0)

Answer 10

f(x) = x^2 - 6x - 5
= x^2 - 6x + 9 - 9 - 5
= x^2 - 6x + 9 - 14
= (x - 3)^2 - 14

Answer 11

C
http://www.wolframalpha.com/input/?i=-4x%5E2+%2B+7x+%2B+5+%3D+0

Answer 12

-1/3 , 5

Answer 13

y = 12x^2 + 16x - 3 factor...
= (2x + 3) (6x - 1)
solve for each when 2x+3=0 and 6x-1=0
x = -2/3 and x = 1/6

Answer 14

no real solutions... so idk :/

Answer 15

also no real solutions...
you can get an account on wolframalpha and they'll show you the steps if you want... but idk :/ sorry
http://www.wolframalpha.com/input/?i=0+%3D+5x%5E2+-+6x+%2B+2

Answer 16

does not factor out evenly... so D

Answer 17

sure :)

Answer 18

k :)

Answer 19

I gtg :/ I'll be back later later maybe...