In order to solve the following system of equations by addition, which of the following could you do before adding the equations so that one variable will be eliminated when you add them 2x-4y=5

C. i believe it is (5×(-20))+(100×(0.7))

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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