1) x=9, because we can use the Pythagorean theorem, x^2 + 144 = 225, x^2 = 81
2) 
, because 6^2 +6^2 = 72, 
3) 
, because 
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Of course it's possible, because it means that sintheta=-2/5 which satisfies this -1<=sintheta<=1
When competition for resources is unnecessary
The era between 1450 and 1750 saw the appearance of several land-based empires who built their power on the use of gunpowder: the Ottomans and the Safavids in Southwest Asia , the Mughals in India , the Ming and Qing in China , and the new Russian Empire.
C) 85
B) 46
D) 131
All you have to do it plug in the cats owned for c and dogs owned for d and then subtract the two for b. Hope that helps!
