Some easy points for you guys!

♫ = 3

☺ = 4

♫ ♫ ☺ = ??

What is the value of x in the diagram below?

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

5x−4≥12 or 12x+5≤−4 can you with this problem