An icicle drips at a rate that can be represented by the function f(x)= - x^2 + 11x - 18, where 0 < x < 10 and x is the number of hours after the sun has risen. When f(x) is a negative number the icicle is not dripping. Determine the values when the icicle starts and stops dripping.

A.) x = 2 and x = 9

B.) x = -2 and x = 9

C.) x = 2 and x = -9

D.) x = -2 and x = -9

Step-by-step explanation:

B.) x = -2 and x = 9

addition

step-by-step explanation:

answer: the proof is mentioned below.

step-by-step explanation:

since, given:   lines bc = ef

prove:   lines ac > ef

          statements                                           reason

1. bc=ef                                           1. given

2. ac= ab+bc                                 2. because b is the point between the  

                                                            line segment ac

3.   ac > bc                                       3. because if a line segment is equal to

                                                          the sum of two line segments then it is

                                                          always greater then each of these

                                                          individual line segments

4. ac > ef                                         4. by equality property.