Two trains leave the station at the same time, one heading east and the other heading west. the westbound train is going 60mph. the eastbound train is going 80mph. how long will it take the two trains to be 252 miles apart?

The variable z is directly proportional to x, and inversely proportional to y. when x is 4 and y is 13, z has the value 1.2307692307692. what is the value of z when x= 9, and y= 20

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 33 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30 ∘c on monday, but decreased at a constant rate in the next 33 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.