A sales analyst listed the probabilities of profits and losses in dollars for a certain company. Find the mean, µ for the probability distribution. x P(x)
-500 0.076
-250 0.191
0 0.265
250 0.316
500 0.152

In two or more complete sentences describe how to determine the appropriate model for the set of data, (1,1), (3,2), (6,3), (11,4).

Two language majors, anna and megan, took exams in two languages. anna scored 85 on both exams. megan scored 74 on the first exam and 85 on the second exam. overall, student scores on the first exam had a mean of 82 and a standard deviation of 4, and the second exam scores had a mean of 71 and a standard deviation of 13. a) to qualify for language honors, a major must maintain at least an 85 average across all language courses taken. so far, which of anna and megan qualify? b) which student's overall performance was better?

How is working backward similar to solving an equation?