We paid $40 for 8 hamburgers how much would we pay for 24 hamburgers

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

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∣∣

Factor -8x3-2x2-12x-3 by grouping what is the resulting expression?