<em><u>im not sureeeeeeeeeeeeeeeeeeeeeeeee</u></em>
Answer:
7
Step-by-step explanation:

The associative property allows you to change the <em>grouping</em> of addends or factors without changing the value of the expression.
Answer:
73 mph during the second hour!
Step-by-step explanation:
Hour 1=54 mph
Hour 2=? mph
Hour 3=82 mph
Total=209 mph
this means that 209=82+54+?
Simplify it and you will get 73
73 mph
Answer:
4
Step-by-step explanation:
= 4