What is the first step when rewriting y = 3x2 + 9x – 18 in the form y = a(x – h)2 + k? 3 must be factored from 3x2 + 9x x must be factored from 3x2 + 9x 9 must be factored from 9x – 18 3 must be factored from 3x2 – 18

A. 3 must be factored from .

Step-by-step explanation:

We have been given an equation . We are asked to choose the correct step, which will convert our given equation in form .

To find the vertex of parabola we use formula , where b represents coefficient of x and a represents coefficient of .

So we can convert our given equation in vertex form of parabola by factoring out greatest common factor of first two terms of our given equation as:

Therefore, option A is the correct choice.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

2/3

step-by-step explanation:

the slope of a line is equal to the rise/run. in this case the line rises 2 units for every +3 units it moves