Answer:

Step-by-step explanation:

The sum of the co interior angles is 180 degrees
Answer:
13
Step-by-step explanation:
The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.
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1) Take the perimeter and divide it by 4.
2) Take the answer from step 1 and square it (multiply by itself)
Answer:
When
and
:

Step-by-step explanation:
-8ab can be seen as -8×a×b. Insert the given values:

Simplify multiplication from left to right:

Insert and solve:

:Done