Equation?
Slope?
Y-intercept?

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

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

If sin(x) = 0 and cos(x) = 1, what is tan(x)?