7) Christine tried to find the solutions to the system below, and her work is shown. x + y +z = 6
2x + z-y = 3
3x - z= 0
rref 2
3
1
1
1
1
- 1
- 1
6 11
3 = 0
0 0
0
1
0
0
0
1
- 31
9
0
Christine is unsure of her error because when she substitutes her solutions in for the "check" it does not
work.

g

step-by-step explanation:

b. x + 1

step-by-step explanation:

i'am smart

i cant answer this, theres no table. sorry man

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.