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➷ Standard deviation = 
Substitute the values in:
= 8.1975...
This can be rounded to give an approximate answer of 8.2
The answer is option A.
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The highest common factor of 4 and 3 is 12
one minute has 60 secs
thus it will blink 60/12=5 times
X in the first equation
because 3x + 6y = 9 can be reduced by dividing by 3, thus, giving u
x + 2y = 3.....x = -2y + 3...which u would sub in for x in the other equation
If you are trying to find the degree of f(-4) the answer is 1.
