Answer:
1.5
Step-by-step explanation:
To find the mean, we must add all of our terms, and then divide by the number of terms.
Solve:
Since we have seven terms, we must divide our total (
), by seven.
÷ 
Solve:
÷ 
Therefore, the mean is 
Answer:
x = 0
Step-by-step explanation:
Note the equal sign, what you do to one side, you do to the other. Isolate the variable, x. Do the opposite of PEMDAS.
First, add 7 to both sides:
9x - 7 (+7) = - 7 (+7)
9x = -7 + 7
9x = 0
Next, divide 9 from both sides:
(9x)/9 = (0)/9
x = 0/9 = 0
x = 0 is your answer.
~
Answer:
22. 18
23. 10
Step-by-step explanation:
22
- you plug the number for the variable into the equation (3(2)²+6
- order of operations say exponents first so you do 2²=4 so you have 3(4)+6
- then you multiple 3•4=12 so 12+6
- finally you add 12+6=18
23
- plug in the number for the variable so 5–(-5)
- so a negative and a minus will make it addition (negative + negative = positive)
- do it is 5+5 which equals 10
