A math class has 5 girls and 3 boys in the seventh grade and 5 girls and 5 boys in the eighth grade the teacher randomly selects a seventh grader and a eighth grader from the class for a competition what is the probability that the students she selects are both boys right your answer as a fraction in simplest form

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.

Which statement is true about a number and its additive inverse? a. their product is always one. b. their sum is always one. c. they are always reciprocals of each other. d. their sum is always zero.

Find the rate at which the water is now flowing from the tap give your answer cubic centimetres per second