Three bowlers each had scored above 250 and the fourth had a score of 225. The total of all 4 scores was 1110 and no bowler scored a perfect 300. What are two possible combinations of the bowlers scores?

The product of two negative rational numbers is always zero sometimes zero never zero

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

Can someone explain to me how to do