The discriminant is b^2 -4ac
a = 1
b = -2
c = 4
discriminant = 4 -4 * 1 * 4 =
4 -16 =
-12
I get MINUS 12 as the answer but that isn't one of the choices.
Answer:
Step-by-step explanation:
Answer:
Option B is correct
The average rate of change of d(t) between 2 second and 4 second is; 90 ft/s
and it represents the average speed of the object between 2 seconds and 4 seconds.
Step-by-step explanation:
Average rate of change of function is defined as the ratio of the difference in the function f(x) as it changes from a to b to the difference between a and b. Then, the average rate of change is denoted as A(x).
As per the given statement, the distance d(t) is in feet and t is the time in second.
To find the average rate of change of d(t) between 2 seconds and 4 seconds.
From the table we have;
at t = 2 , d(2) = 60
and
at t =4 , d(4) = 240.
Then, by the definition of average rate of change ;
=
Simplify:
therefore, the average rate of change of d(t) between 2 second and 4 second is; 90 ft/s and it represents the average speed of the object between 2 seconds and 4 seconds.
Below, H = heads, T = tails, and 1, 2, 3 are the number outcomes of the spinner. For example, H1 means heads on the coin toss followed by 1 on the spinner.
If heads appears, a spinner that can land on any number from 1 to 3 is spun.
This gives possible outcomes: H1, H2, H3
If tails appears, a second coin is tossed
This gives possible outcomes: TH, TT
All outcomes are: H1, H2, H3, TH, TT
Answer:
either of two angles whose sum is 90°
Answer:
bet
Step-by-step explanation:
