PLEASE HELP ME I WILL GIVE BRAINLIEST

7. B

2x^2-12x+18+9=2x^2-12x+27

8. X=4

No explanation really, just what number is the x value of the vertex

9. ?

10. C

I like to use desmos for this kind of problem, its a graphing tool. The parabola opens down and the maximum is -6, while the vertex is (-9, -6)

11. 0<=x<=2.8

Just look at the max and min x values (endpoints in this case)

12. 0<=x<=9.8

Same as above but with y values (endpoint and vertex usually)

13. ?

14. -infinity<x<=12

Use desmos! Then take the vertex y value and the minimum y value C:

Hope this helps a bit!

step-by-step explanation:

10.416 m/s

step-by-step explantion:

distance=100m

time= 9.6s

average speed=100/9.6

=10.416 m/s