Answer:

Step-by-step explanation:

The first set of parentheses is unnecessary, so it can just be removed.

To remove the second set of parentheses, you must distribute the negative sign that is to its left. It changes every sign inside the parentheses.

Now you combine like terms.


Answer:
Yah, it can as long as it has three sides
Answer:
B. 198
Step-by-step explanation:
Answer:
0.17
Step-by-step explanation: