Can someone me to answer this question. an electrician cuts the following lengths from a roll of 12 gauge wire with red insulation: 8, 15, 15, and 21 feet. how many feet of wire did she use?

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 of the following tables represents exponential functions?

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?