I need help I put 30 points for whoever helps me

How can you construct perpendicular lines and prove theorems about perpendicular lines

Indicate the formula for the following conditions: p^c(n,r)=

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your