The picture is a bit blurry but the perimeter of a shape is the lengths added.
(4a - 2b) + (7a + 3) + (9a - 4) = perimeter, I added the sides together
Combine like terms to get:
4a + 7a + 9a = 20a
-2b is left along becuase there are no other like terms
3 - 4 = -1
The perimeter is 20a - 2b - 1
Answer:
The answer should be, x ÷ 180 or 
<em>good luck, i hope this helps :)
</em>
Answer:
C Is the correct answer
I am not sure please check it out once
Answer:

Godbel is wrong in the reasoning as the answer does not depend on the number of negative numbers in the expression. Instead it depends on the value of the sum of positive terms and the value of the sum of negative terms. If the values of sum of positive terms is greater than the value of the sum of negative terms then the answer will be a positive and vice versa.
Step-by-step explanation:
Given expression:

To evaluate the expression.
Solution:
We have: 
Removing parenthesis first as a positive and negative multiply to give a negative.
⇒ 
Then we can group the positives and negatives together.
⇒ 
⇒ 
Since the negatives combine by getting added up with the sum being negative, so we have:
⇒ 
As, we can see the positive value (21) is greater than the negative value (15) and hence the answer would be a positive.
⇒ 6
Godbel is wrong in the reasoning as the answer does not depend on the number of negative numbers in the expression. Instead it depends on the value of the sum of positive terms and the value of the sum of negative terms. If the values of sum of positive terms is greater than the value of the sum of negative terms then the answer will be a positive and vice versa.
The answer is irrational I believe. It’s not a decimal that just ends.