An electronics store sends an email survey to all customers who bought tablets.

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.

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39