What is the period of the function: = ( − ) +

Ineed ! the person who answers and shows their work on they got the answer first will be marked the !

If jaime wants to find 60% of 320, which table should he use?

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