The last one is correct because 60+35+35+35=165
55+55+55=165
<span>the answer is 21 if that's a choice
</span><span>
</span>
Because the two angles on the right add to 180 degrees, we can create this system:

We can also prove that

, which, when solved, shows that

.
When plugged in to the original equation, we find that y = 105 degrees.
Answer:
D
Step-by-step explanation:
you first have to find the domain by finding where the expression is defined
so the answer would be x>5