Atrack coach is trying to improve the  50-meter-dash times of the track team. he times each student and then implements a month-long training program. at the end of the program, he timed each of the students again. the box plots show the number of seconds it took the students to run the  5050-meter-dash before and after the program. using the plots, how much did the median change?


2nd one in the first row is correct

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

hope this is what you were asking for!

step-by-step explanation:

multiplication is multiplication.   it might feel harder depending on what level of math you are in, but generally it will be the same old stuff, while implementing some new concepts and methods of solving work.