The value of y is directly proportional to the value of x, if y = 104, when x = 13. What is the
value of y when x = 5?

What can you determine about the solutions of this system

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

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c