I was just talking to my bro friends in a meet and they told me to deafen but i didnt know how to do that so I just muted and the first thing I hear was- "Dude im extremely hard." What does that mean?

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

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.

Need solving this 2nd limit problem.