kristin drove to her friend's house and back. on the trip there she drove 40 km/h and on the return trip she went 50 km/h. how long did the trip there take if the return trip took four hours?

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x, y) ?

Adrawer contains 12 identical white socks, 18 identical black socks and 14 identical brown socks. what is the least number of socks you must choose, without looking, to be certain that you have chosen two socks of the same colour?

Hi, can anyone show me how to do this problem? 100 points for this. in advance