What is the difference between union set and universal set

Create another three examples that does not behave like a function. explain why your chose each example to fit the category be very

Use the distributive law to multiply. 3(4x + 5y + 6)

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?