What is the answer for this question?

In trapezoid klmn, kj=19.2 and jm=22.5. identify ln.

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?

When is g(x) = 0 for the function g(x) = 5.23x + 4?