11. Simplify the complex fraction.
n-4
n² - 2n-15
n +1
n +3
n-4
(n-3)(n+1)
n-4
(n-1)(n+3)
n-4
(n-5)(n+1)
(n-4)(n+3)
(n-5)(n+1)

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers