Need quick
what is the mean of this set: {2, 6, 7, 9, 9, 9}?
6
7
8
9

B. 7

The mean (also known as the average) is found by adding all of the numbers in the set together, then dividing the result by how many numbers are in the set.

First, add the numbers together.  

Finally, divide that by the amount of numbers in the set.  

false

step-by-step explanation:

4y - 6 + 4y^2 - 9

before simplifying this contains 4 terms

after simplifying

4y -15 + 4y^2

it contains 3 terms

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72