Answer:
None.
Step-by-step explanation:
The only possible restriction in the rational expression 
can originate in its denominator being zero for some values of a. However, since the denominator in this case (a^2+4) is always positive (and larger or equal to 4) for all values, no restrictions on the variable a exist.
(4x² + 6) + (2x² + 6x + 3) = 4x² + 6 + 2x² + 6x + 3 = 6x² + 6x + 9
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Answer: 6x² + 6x + 9 (Answer C)
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Answer:
The correct answer is "Investigating the mean of the sample is the same as investigating the sampling distribution of the mean"
Step-by-step explanation:
For sampling distribution of the mean, if the size of population is n, and its mean is μ and the population standard deviation is σ, then the mean of all sample means also becomes equal to the population mean μ but for that the samples are taken randomly from the given population
Answer:
220
Step-by-step explanation:
Easy!
Multiply 55 by 4!
2
55
x 4
--------
220
five times 4 is 20, so put 0 then regroup the 2. Then, 5 times 4 again, but add two!
x=3 if the m was a typo, idk what that means
