Which of the following is not a property of all rigid motions?

(1) angles are preserved
(2) the length of a line segment and the length of its image are equal
(3) lines are mapped to parallel lines
(4) the images of two perpendicular lines will be themselves perpendicular

answer:

c.

step-by-step explanation:

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

the answer would be  

a.

3: 1

step-by-step explanation: