How would I solve the equation of x+7= -9

Polygon mnopq is dilated by a scale factor of 0.8 with the origin as the center of dilation, resulting in the image m′n′o′p′q′. the coordinates of point m are (2, 4), and the coordinates of point n are (3, 5). the slope of is .

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x