Answer:
34 i hope this is right good luck to you
Answer:
a2=b2+c2-2bc cos a
Step-by-step explanation:
Answer:
The choose first.

Step-by-step explanation:

I hope I helped you^_^
Answer:
(y+7)²/364 - (x+8)²/364 = 1
Step-by-step explanation:
This is the standard form of a vertical hyperbola (y-k)²/a² - (x-h)²/b² = 1
so, (y²+14y+?) - (x²+16x+?) = 251
(y²+14+49)-49 - (x²+16x+64)-64 = 251
(y+7)² - (x+8)² = 251 + 49 + 64
(y+7)² - (x+8)² = 364
(y+7)²/364 - (x+8)²/364 = 1