Please help i'll mark big brain

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?

If a line is defined by the equation y = 5x + 2, what is the slope?

The function f(x) = 1/6(2/5)x is reflected across the y-axis to create the function g(x). which ordered pair is on g(x)? a. (-3, 4/375) b. (-2, 25/24) c. (2, 2/75) d. (3, -125/48)