During a sale, a store offered a 15% discount on a tablet computer that originally sold for $520. After the sale, the discounted price of the tablet computer was marked up by 15%. What was the price of the tablet computer after the markup? Round to the nearest cent.

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.

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2