100 points! graph each function by addition of ordinates, i dont need you to graph i only need to find the key angles and points. y = 2x^2 + x - 1

X-intercepts: 0.5 and -1

Vertex - (-1/4, -9/8)

Step-by-step explanation:

Using factoring, we can get (2x-1) (x+1)

This gives us x-intercepts, .5 and -1

Vertex -

-b/2a

-1/4

Plug this into the equation and get -

(-1/4, -9/8)

y < -3

step-by-step explanation:

-3y - 2 > 7

-3y -2 + 2 > 7+2

-3y > 9

-3y/-3 < 9/-3   (change the inequality sign when multiplying or dividing by a negative number)

y < -3

the aswere is the one with all 8's and the second one is with the 10,8 and 6

step-by-step explanation: