Which procedure can be used to solve the equation 540 = 12 z, and what is the solution? Multiply both sides by 12; the solution is 6,480. Multiply 12 z by 12; the solution is 540. Divide both sides by 12; the solution is 45. Divide 12 z by 12; the solution is 540.

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.

Afurniture store is having a weekend sale and is offering a 20% discount on patio chairs and tables the sales tax on furniture is 6.25%

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25