·A long distance runner started on a course running at an average speed of 6 mph. One hour later, a second runner began the same course at an average
speed of 8 mph. How long after the second runner started will the second
runner overtake the first runner? I also need the work pls help!

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

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1