PLZ HELP ME THIS IS 7TH GRADE MATH I NEED HELP ASAP

An equation where variables are used to represent known values—function notation true or false

What describes horizontal cross section of the right rectangle 6m 8m 5m

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