I am helping a friend at her store and she is having a sale. I am selling shirts and a pair of socks with a gift set. Each t-shirt cost $10 and each pair of socks cost $1.00. At the end of the day we made $110. I sold a total of 20 t-shirts and pairs of socks combined. How many t-shirts were sold and how many pairs of socks were sold?

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