The ages of attendees at a birthday party are shown below. Which of the following is closest to the mean age of the attendees? 11, 12, 12, 12, 12, 14, 15, 17, 18 (1) 12.9
(2) 13.2
(3) 13.7
(4) 14.1​

Add, subtract, multiply, or divide as indicated. list any restrictions for the variable(s) and simplify the answers when possible. 1) x-2 / x+5 + 3x / 2x-1 2) x+6 / x-6 - x^2 / x+6 3) x+9 / x-4 + x+2 / x^2-11x+28 4) x / x^2-64 + 11 / 2x^2+11x-40 5) 5 / x + 11 / x-3 - x-4 / x^2+2x-15