Answer: 
<u>Step-by-step explanation:</u>


Insert x = 13 and y = 1:
x² + 2hxy + 12y² = 0
(13)² + 2(13)(1) + 12(1)² = 0
169 + 26h + 12 = 0
26h + 181 = 0
26h = -181




Answer:
i think its 31
Step-by-step explanation:
Answer: The answer is $4.20
Step-by-step explanation:
Hi.
This is just messing around with exterior angles.
I say around 120 degrees, if I forgot what exterior angles were.
But <em>with quick calculation, it is probably 120 degrees</em>