It takes the high-speed train x hours to travel the z miles from town a to town b at a constant rate, while it takes the regular train y hours to travel the same distance at a constant rate. if the high-speed train leaves town a for town b at the same time that the regular train leaves town b for town a, how many more miles will the high-speed train have traveled than the regular train when the two trains pass each other?
(a) z(y – x)/x + y
(b) z(x – y)/x + y
(c) z(x + y)/y – x
(d) xy(x – y)/x + y
(e) xy(y – x)/x + y

Someone answer this asap for gabriella uses the current exchange rate to write the function, h(x), where x is the number of u.s. dollars and h(x) is the number of euros, the european union currency. she checks the rate and finds that h(100) = 7.5. which statement best describes what h(100) = 75 signifies? a. gabriella averages 7.5 u.s. dollars for every 100 euros. b. gabriella averages 100 u.s. dollars for every 25 euros. c. gabriella can exchange 75 u.s. dollars for 100 euros. d. gabriella can exchange 100 u.s. dollars for 75 euros.