The answer is that the equation y=5x+31 is perpendicular to the equation y=-1/5x+3 and that equation passes through (-5,6) also y=5x+31 is in y=mx+b form already
y=mx+b
y=mx+b
6. Andy scored 90 on the last history exam. He scored 81 this time. By what percent did his score decrease?
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