Two cars leave the same point at the same time traveling in opposite directions. One car travels west at 20 mph and the other travels east at 60 mph. In how many hours will they be 280 miles apart?

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.