3x - 3y = 9
x + 3y = 12
(do not round your decimal answers)

What is the degree of the monomial? a. 6x2 b. −x3y3 c. 7x

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

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 florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.