Samantha, cleo, and elena had $780 altogether. samantha had $40 more than cleo, and cleo had twice as much money as elena. how much money did cleo have?

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.