Just substitue
for
in the expression.



Answer:
the answer is
x + y + z = 180 degrees
proof
the sum of all angles in the triangles is always equal to 180 degrees
Step-by-step explanation:
Answer:

Step-by-step explanation:
<u>Step 1: Combine on the right side
</u>


<u>Step 2: Divide both sides by 90
</u>



Answer: 
V = 8, because it can’t be simplified any further.
Answer:
I'm sorry I couldn't help you
Step-by-step explanation: