Assignment: 
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Answer: 
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Explanation: 
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[ Step One ] Rewrite 
[ Step Two ] Apply perfect square formula
Note: Perfect Square Formula: 
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Answer:
b = 8.9
Step-by-step explanation:
( 12^2 - 8^2 )
(144 - 64)
b= 8.9
Answer:
the first option
Step-by-step explanation:
really, just look at the table.
is the mean value (10.4) larger than the median (13.4) ?
I hope you can see right away that it is not.
and you can see they are not the same either.
so, all the answer options mentioning mean larger than median or equal to median can be ruled out right away.
so, it is between the first two options.
now think ! how do we draw number lines ? a coordinate axis ?
the smaller numbers left, the larger numbers right. the numbers grow from left to right.
the mean value is simply the sum of all measurements divided by the number of measurements (how many median were done). if that is smaller that the median (so, the Mean is left of the Median), it means that the majority of measurements had a result smaller (to the left) than the Median. so, it is skewed-left.
The simplified form of this expression is 4D^21
