The candle was 10 inches long when new. each half hour 3/4 inch of the candle burned away. after 4 hours, how long was the candle?

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 axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Which expression is the factorization of x^2+10+21