What is the row operation that belongs before step 4 in order to get that matrix? A) R1 +2R2 = R1 B) 2R2 - R1 = R1 C) R1 + (1/2)R2 = R1 D) (1/2)R2 - R1 = R1

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.

The number of branches on a tree demonstrates the fibonacci sequence. how many branches would there be on the next two levels of this tree? 13 | | | m branches

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?