$21 because 3$x$7(numbers of days in a week)is $21. I hope this helps :)
5/10 is equal to 25/50
I ts because you multiply 5x5 to get 25 and do the same to the denominator so 10x5 is equal to 50 so 25/50 is the answer.
I think the correct answer would be : p = -n+4m/L
I hope this helps !
