So can you help me please ..u could choose which one u wanna do I will give Brainliest

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

Pls math have no ideamultiply and simppify. 2x^2y^3z^2 • 4xy^4x^2

What percent of $1.00 are a nickel and a dime?