A is commutative property
B is associative property
Explanation:
Number one is really easy just set it up in proportions. 420 over x and 7 hours over 24 cause you know there 24 hours in a day and then cross division and simplify. I think.
Step-by-step explanation:
you need to find out how many poeple u have first
B because it is the midpoint for segment shown above
