Justin weighs 15 pounds less than Gerg weigh half of Greg's weight is 75 lb less than Justin's weight how much does each of them weight

Two lines parallel to a third line are parallel to each other. always sometimes or never

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.

To determine the number of deer in a forest a forest ranger tags 280 and releases them back