as a real estate agent in the urbana champaign area, you have long made the claim that houses sold in urbana are generally older than the houses sold in Champaign. You decide to check whether this claim is statistically valid and assume that the population variances are equal. You collect a sample of houses sold in the two cities, and find the following data: What is the appropriate distribution to compare your test statistic to

If jm equals 5x -8 and lm equals 2x -6 which expression represents jl

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

Consider 6x2 + 6x + 1. which term immediately tells you that this expression is not a perfect square trinomial? justify your answer