Mr. menendez ran 13.1 miles at a constant rate for 150 minutes. to find how fast he ran, you solve the equation 13.1 = x • 150. what does x represent?

1.)his speed in miles per minute
2.)the total distance after x minutes
3.)the number of miles he has run so far
4.)the amount of time it takes to run 13.1 miles

X represents his unit rate which is answer #1, speed in miles per minute. It wouldn't make sense to have total distance which is #2 because his total distance is what you are using to find out what x is! Then the number of miles he has run so far makes no sense whatsoever so eliminate that, then 4 is basically is the time it takes to run 13.1 miles which is 150. Hope you understand why the answer is 1. and mark as brainliest!

A= b/2 because u simplying both sides of equation