Let Xmean be the mean of a set of data with individual elements Xi. What is the sum of the deviations, where deviation is defined as (Xi−Xmean), for the set of data {7,4,6,4,9}?

Which sentence describes why polygon mnop is congruent to polygon jklp? a. polygon jklp maps to polygon mnop through a translation. b. polygon jklp maps to polygon mnop through a rotation. c. polygon jklp maps to polygon mnop through a dilation. d. polygon jklp maps to polygon mnop through a stretch.

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.