The answer is 140.
Interior angles equal 180…so 180-120-20= 40. 40 is your x value. Angles on a straight line equal 180, so 180-40=140.
I think the correct answer would be A. The standard deviation is used than the variance because the units of variance are squared units. It does not say anything or is meaningless while standard deviation has the same units as the mean which is a measure of central tendency.
14% is 14/100 or 0.14
56 * 14 / 100 = 7.84
Answer:
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Step-by-step explanation:
