The number y is irrational. Which statement about y -4 is true

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

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 triangle. a = 21°, c = 105°, c = 5