Simplify this: x^n+1y^2(xy^2)^n−1

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.