Which of the following is equal to the rational expression when x does not equal 2 or -4

The reflexive property of congruence lets you say that ∠pqr ≅

If you answer 2+2 you will get over 80 points

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?