Andrea has averaged the ages of 12 people in her class, and the mean is 16 years old. she removes one person from the data set and the mean becomes 15 years old. which age was removed from the data set?

a.) 15
b.) 16
c.) 27
d.) 28

What is this inequality notation? t is less then or equal to 2

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight in pounds, w, of the contents that liz will ship to her friend if she must use a medium flat-rate box. use the drop-down menus to explain your answer.