Kevin solved a problem by making these lists: 12: 24,36,48,60 15: 15,30,45,60 what was kevin solving

Solve for x i'll try to attach the files bc it's not letting me for some reason

What is the point-slope equation of a line with slope -5 that contains the point (6,3)

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?