Andrew studied x hours on Monday, y hours on Tuesday, and z hours on Wednesday. Which expression represents the average number of hours per day Andrew studied? A. x+y+z
B. 3(x+y+z)
C. 3(xyz)
D. x+y+z

3

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.