How do you simplify # (x+3)/(x^2+7x+12)#?

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

What is the length of an with endpoints a 3,2 and b 8,14

7.(03.01 lc)which set represents the range of the function shown? {(-1, 5), (2,8), (5, 3), 13, -4)} (5 points){-1, 2, 5, 13){(5, -1), (8, 2), (3,5), (-4, 13)){-4, 3, 5, 8}{-4, -1, 2, 3, 5, 5, 8, 13}