Find the coordinates & radius of the circle by completing the square.

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∣∣

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)