Evaluate 13-0.5+6x when w=10 and x=1/2

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∣∣

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?