Here is your answer
REASON:
: The opposite sides of a parallelogram are equal.
So, in above given figure
(measures of opposite sides)
HOPE IT IS USEFUL
Answer: 54 mph
Step-by-step explanation:
d-the distance
s+9 - the speed to the conference
d=6*(s+9)
s- is the speed on the way back home
d=7*s
so 6*(s+9)=7*s
6s+54=7s
-6s -6s
54= 7s-6s
s=54 mph
No order of operations is what you might know as Pemdas ,number of Operations is something iv'e never heard of.