It is A.
You know this because it is always n-1. (:
This looks like a parabola so:
y=x^2 - 20x + 15 --> x^2 - 20x +15=y
(x^2 -20x)=y - 15 --> (x - 10)^2=y - 15 +100 ( used complete the square)
(x - 10)^2=y + 85
45 because you do 210-120 which is 90. 90÷2 is 45.
-JZ
Answer:
Step-by-step explanation:
To do this we need to first multiply by the number of feet in a mile to get:
311520 feet per hour
Then we divide by 3600 to get this into feet per second:
86.53333... feet per second
Now rounding this we get 87 feet per second.
Graphing Rules
The independent variable is plotted on the abscissa (also called the x-axis or horizontal axis), while the dependent variable is plotted on the ordinate (also called the y-axis or vertical axis).