Factor. x^2-7x+12 a. (x-3)(x-4) b. (x+3)(x+4) c. (x-12)(x-1) d. (x-6)(x-2)

The lengths of two sides of a triangle are 9 and 15. what can be said about the length of the third side? a. it must be greater than or equal to 6 and less than 24. b. it must be greater than or equal to 6 and at most 24. c. it must be greater than 6 and less than 24. d. it must be greater than 6 and at most 24.