What is the best description to the relation. A. a function that is a one-to-one
B. a function that is many-to-one
C. a function that is one-to-many
D. a relation that is not a function

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

Random variables x poisson~ ( a) ,y poisson ~ ( a) . x and y are independent. if 2 1, 2 1. u =2x+ y-1, v=2x- y +1. find: ) cov (u ,v ).

How much higher is checkpoint 4 than checkpoint 2 if checkpoint 4 is -143 and checkpoint 2 is -182