A boat took 4 hours to make a downstream trip with a current of 6 km/h. The return trip against the same current took 6 hours. Find the speed of the boat in still water.

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Atotal of 766 tickets were sold for the school play. they were either adult tickets or student tickets. there were 66 more student tickets sold than adult tickets. how many adult tickets were sold?

Algebraically prove that a clockwise and counterclockwise rotation of 180° about the origin for triangle abc are equivalent rotations.