Answer:
Step-by-step explanation:
2p - q + 4 - ( p - q )
2p - q + 4 - p + q
By rearranging the terms
2p - p + 4
( you might think where -q and +q went ???
They are cancelled because they have opposite signs )
∴The answer is p + 4
Hope it helps
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difference between standard deviation and mean deviation
Answer:
Standard deviation is basically used for the variability of data and frequently use to know the volatility of the stock. A mean is basically the average of a set of two or more numbers. Mean is basically the simple average of data
Hope this helps!!

Answer:
8 times 9 times 7
504
Step-by-step explanation: