It’s very easy to see whether your subtraction is correct. Simply add the difference and the subtrahend. It should equal the minuend. For example, to check the preceding subtraction problem (208 – 135 = 73), add as follows: 73 + 135 = 208. Since the answer here equals the minuend of the subtraction problem, you know your answer is correct. If the numbers are not equal, something is wrong. You must then check your subtraction to find the mistake.

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

How do you determine whether a relationship represented as as graph is linear or nonlinear

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.