List the next nine multiples of each number . find the common multiples

6. Multiples of 3- 6,9,12,15,18,21,24,27,30
Multiples of 9- 18,27,36,45,54,63,72,81,90
Common Multiples- 9 and 18
7. Multiples of 6- 12,18,24,30,36,42,48,54,60
Multiples of 8- 16,24,32,40,48,56,64,72,80
Common Multiples- 24 and 48

Hope this helps 

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c