Round 3.86 to the nearest tenth

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∣∣

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?