When calculating the standard deviation, what must be done in order to obtain an unbiased estimate of the population? add 1 to n subtract 1 from x subtract 1 from n subtract 1 from n?

Write an equation for the line that passes through (3, 6) and (4, 8). A: y = 2x (i think this is the answer) B: y = - 2x C: y = - 2x - 2 D: y = 2x + 2 E: none of the above

What is the range of f (x) = 3x + 9?

Last year there were 120 students in choir. This year, 30% more students took choir. How many students are taking choir this year?

Among 320 randomly selected airline travelers, the mean number of hours spent travelling per year is 24 hours and the standard deviation is 2.9. What is the margin of error, assuming a 90% confidence level? Round your answer to the nearest tenth. 0.

X-3y=7 2x-6y=12 using elimination?

If two men can paint two rooms in two hours, how long will it take for one man to paint one room

Natalia is writing a recursive formula to represent the sequence 8,12,18,27 what value should she use as the common ratio in the formula? write the answer as a decimal rounded to the nearest tenth place

Find X if f (x) = 2x + 7 and f (x) = - 1 A. - 2 = x B. - 4 = x C. 1 = x D. 0 = x

When is the product of two integers less than or equal both of the two factors?

What Is The Answer To The Problem? 3 (6/8 - 1/2) + 0.25