Each of 7 students reported the number of movies they saw in the past year. Here is what they reported.
18,11,15,12,5,16,5
Find the mean number of movies that the students saw. If necessary, round your answer to the nearest tenth.
(The answer is not 8.6)

On the first of each month, shelly runs a 5k race. she keeps track of her times to track her progress. her time in minutes is recorded in the table: jan 40.55 july 35.38 feb 41.51 aug 37.48 mar 42.01 sept 40.87 apr 38.76 oct 48.32 may 36.32 nov 41.59 june 34.28 dec 42.71 determine the difference between the mean of the data, including the outlier and excluding the outlier. round to the hundredths place. 39.98 39.22 0.76 1.21

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9

Reflect the point (7,0) across the y-axis