PLEASE HELP IM SO LOST. i was sick and missed all the notes so i have no clue how to do this and now i have an F

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. how many hours after the truck's departure will the two meet?

5. (03.02)if g(x) = x2 + 3, find g(4). (2 points)1619811

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?