A school sells adult and student tickets to a football game. Mrs. Smith purchases two adult tickets and four student tickets for a total of $36. Mr. Jones buys four adult tickets and five student tickets, paying $57. How much does an adult ticket cost? How much does a student ticket cost?​

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