Which of the following equations is true? 42=14−2 42=−4−2 42−4−2= −1 42+4−2= 0

Pls i’m too dumb to know what i’m doing right now

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

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