Is 8/20 and 20/80 proportional or not proportional to correctly classify each pair of ratios

For each proportion find the unknown number x 1/5/8=×/15

Ill mark the brainliest if you me with the these three questions 7,8,9

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling