Hector surveyed all the sixth graders at his school about their favorite after-school activity. the table shows the results that were used to make a bar graph.
favorite activities
activity
number of students
reading 44 sports 55 video games 55 music 66
which percentage bar graph best represents the data?

Suppose there are 10 five and six-year-old attending a birthday party. when a 30 year old mother walks into the room with an infant in her arms, what happens to the mean age in the room? what happens to the standard deviation of ages in the room? a. the mean and standard deviation of both change. b. the meaning will change, but the standard deviation will stay approximately the same. c. i mean will stay approximately the same, but the standard deviation will change. d. the mean and standard deviation will both stay approximately the same.

What are “like terms”? why can we only add like terms?

Write an algebraic expression to match each statement a. four less than 8 times a number b. twice the difference of a number and six c. nine from a number squared