John turned on his video game system to continue a game he had saved. he started playing with 450 points. in three successive actions, he doubled his score, lost 250 points, then tripled his score. what was his final score after these three actions? a. 1,850 points b. 1,950 points c. 2,150 points d. 2,250 points

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.

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Find the quotient with the restriction.