METHOD 1
f(3) = 20
f(4) = 30
f(5) = 42
f(6) = 56
rate of change
f(4)-f(3)=10
f(5)-f(4)=12
f(6)-f(5)=14
then the average of change is 10+12+14 /3 = 12
METHOD 2 --- faster
rate of change = f(6)-f(3) / 6-3
= (36+18+2)-(9+9+2) / 3
= 36/3 = 12
Answer:
The correct option is b.
Step-by-step explanation:
The given function is

We need to find the value of f(-2). It means we have to find the value of given function at x=-2.
Substitute x=-2 in the given function to find the value of f(-2).

On simplification we get


The value of f(-2) is 11. Therefore the correct option is b.
Width = 7cm
Length = 13cm
<u>Explanation:</u>
Area of rectangle = 
Let width of the rectangle = b ,
So, length = b+6
Area of rectangle = (length X width) - eqn 1
Putting the value of length and width in above equation 1,

On solving the quadratic equation we get,
b = 7cm
So, width (b) = 7cm
and length = 7+6
l = 13cm
Hence,
Width = 7cm
Length = 13cm
The mean of a data us the addition of all numbers in the data set and then dividing them by the number of values in a set.
<h3>What is a mean?</h3>
Your information is incomplete. Therefore, an overview will be given. It should be noted that a mean simply means the average of a set of numbers that are given.
For example, if we have the following numbers:
3, 9, 4, 1, and 3. The mean will be:
= (3 + 9 + 4 + 1 + 3)/5
= 4
The mean absolute deviation is the average distance between the data points and the mean.
Learn more about mean on:
brainly.com/question/1136789
Answer:
its 10
Step-by-step explanation:
because all you have to do is add a zero for each place you go