Rebekah's Decorating Service recommends putting a border around the top of the four walls in a dining room. The room is 3 feet longer than it is wide, find the dimensions of the room if the total length of the border is 54
feet.

Can you simplify 4/7? 24 points will be awarded!

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

The length of the line segment joining the midpoints of sides ab and bc of the parallelogram abcd is 10. find the length of diagnol ac