You add +7 to both sides and then divide by 9 to get the x alone.
The mean of the answer is 20.5 because you add all of the number together and divide by 6 because there's 6 numbers.
I'm sorry, but I don't know how to do the standard deviation...
Hope this helped!
Answer:
$402
Step-by-step explanation:
Interest = principal x rate x time
I = 1500 x .268
I = $402
Answer:
Mean = 70,000 dollars
SD = 800 dollars
For Khan Academy
Step-by-step explanation: