3x+4y=19 and 3x+6y=33 solve by elimination

Just subtract the 1st equation from the 2nd, as follows:

  3x+6y=33
-(3x+4y=19)

         2y= 14, and y = 7.   Sub 7 for y in either of the original equations to obtain the value of x.  Write your answer in the form  (x, 7).

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