I’m stuck with this question plz help

Use the elimination method to solve the systems of equations. choose the correct ordered pair. 7x+4y=39

Apolygon is shown on the graph: a polygon is shown on the coordinate plane. vertices are located at 3 comma 5, 1 comma 3, 1 comma 1, 2 comma 0, 4 comma 0, 5 comma 1, and 5 comma 3. what effect will a translation 3 units down and 2 units left have on the polygon? be sure to address how it could impact the angles, side lengths, and congruency between the original pre-image and the image. xd i need

Find the rate of change for the situation. you run 7 miles in one hour and 21 miles in three hours.