I need help with this

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?

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122