Which is the best estimate of the mass os a basketball

Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation

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

Let event a = you roll an even number on the first cube.let event b = you roll a 6 on the second cube.are the events independent or dependent? why?