The least common multiple of 18 and 42 is 126. Sorry I don't know how to explain it.
The simplified form is 20x^2. Because you 2x*2, you get 4x. You multiply that by 5x, and then you get your answer.
A square rotated about its center by 360º maps onto itself at 4 different angles of rotation. You can reflect a square onto itself across 4 different lines of reflection.
C it’s korrect now 123456
