Answer:
f(8) = -208
Step-by-step explanation:
Apply 8 into the equation
f(8) = -3(8)² - 2(8)
= -192 - 16
= -208
8 will be your x value since it's implied within the question itself.
Distributive formula:
a(b+c) = ab + ac
12(6b+2) = 12(6b) + 12(2) = 72b + 24
Your answer is B.
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.
Order of operations
PEMDAS
parenthasees
exponents
multipication or division whichever comes first
addition or subtraction whichere comes first
first muliplication
-3/7 times 7/10=-21/70=-3/10
then we have
-2/5-3/10
make bottom number 10
-2/5=-4/10
-4/10-3/10=-7/10
answer is A
