parallel lines m and n intersect parallel lines x and y, representing two sets of intersecting railroad tracks what angles do the tracks intersect

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?

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.

Javier bought a painting for $150. each year, the painting's value increases by a factor of 1.15. which expression gives the painting's value after 77 years?