PLEASE HELP WITH BOTH QUESTIONS WITH STEPS DUE BY MIDNIGHT

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.

Using only odd number for numerators write two different subtraction problems that have a difference of 3/4

Quadrilateral abcd is translated up and to the right, and then rotated about point q. which congruency statement is correct?