Which shows the correct substitution of the values a, b, and c from the equation –2 = –x + x2 – 4 into the quadratic formula?

We substitute

And simplify

Step-by-step explanation:

First we rearrange the equation -2=-x+x2-4 into standard form of a quadratic . This equation becomes where a=1, b=-1, and c=-2.

The formula is:

.

We substitute

And simplify

answer: given that the roller coaster can accommodate 1600 riders per hour, thus the roller coaster can accomodate 1600 / 60 = 26.67 riders per minute.

given that there are 345 people in the line, the number of minutes it will take for the 345 persons to get into the roller coaster is given by 345 / 26.67 = 12.94 minutes.

therefore, it will take you 12.94 minutes to get to the front of the line.

step-by-step explanation:

the balance is found at the link

step-by-step explanation: