(−m)(n)p(3m−5n+7p)
=((−m)(n)p)(3m+−5n+7p)
=((−m)(n)p)(3m)+((−m)(n)p)(−5n)+((−m)(n)p)(7p)
=−3m^2np+5mn^2p−7mnp^2
Well read the story part of your paragraph. You need to cut out all of the extra stuff and focus on how fast they are going. Then make a chart symbolizing this to find where they directly meet:) If you are able submit the chart with your answer