Write the expression in interval notation {x||x-6| greater than or equal to 4}

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?

Can someone me with this graph problem by the way i need to know the answers by today since this assignment is due ! !

Corresponding angles are a. always b. sometimes c. never congruent