Which expression is equivalent to -2(3a + 6b) + (4a - 2b)? a) -2(a + 7b) b) -2(a - 7b) c) 2(a + 7b) d) 2(a - 7b)

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.