B. 6
Explanation: 8(6+4)= 80
38+ 7(6)= 80
Here is the work for that problem
Answer:
if
and
.
Step-by-step explanation:
We are given
and
.
We are asked to find
.
means 

You only have one pair of like terms, that is the constants.


Answer:
19.5
Step-by-step explanation:
78 divided by 4