STEP 1
Mean =

STEP 2
Subtract the mean from each data value then square the answer

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STEP 3
Add the squared answers in STEP 2 then find the mean

STEP 4
Square root the answer in STEP 3

Standard deviation is 236.5
There are two so I'll give you the answer to both! 4,000 and 400
Answer:
#1 is 3x + 4 =-17 #2 is 3x =-21 #3 is x = -7 #4 is 2x + x +4 = -17
Step-by-step explanation:
#1 gives you the problem ready to be worked out. #2 all you need to do to finish it is divide both sides by 3. #3 the answer is already there. #4 You need to combine the like terms then solve the problem.