What is the area of the triangle?

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

Find the maximum value of p= 4x + 5y subject to the following constraints :

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)