Ineed to write an equation for a line slope-intercept form for the following.

Given a circle with a radius of 2 which is the length of an arc measuring 75

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

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect