Simplify an expression 3(4x+y) + 2(3x-5y)

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

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

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)