If you want to find the axis of symmetry, you do -b/2a (The quadradic equation is represented like this: ax^2+bx+c. Of course, this can change) Once you input the numbers, you can find out whats right!
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∣∣