Answer:
Step-by-step explanation:
-6 - (-9)
1) Remove parentheses
-6 + 9
2) Simplify
3
See attachted image for rules of positive and negative integers.
Source: YourDictionary
Answer: x=−10
Step-by-step explanation:
x−3−2(x+6)=−5
x+−3+(−2)(x)+(−2)(6)=−5(Distribute)
x+−3+−2x+−12=−5
(x+−2x)+(−3+−12)=−5(Combine Like Terms)
−x+−15=−5
−x−15=−5
−x−15+15=−5+15
−x=10
Answer:



[since in third quadrant cos 30=-![\frac{\sqrt{3}}{2}]](https://tex.z-dn.net/?f=%20%5Cfrac%7B%5Csqrt%7B3%7D%7D%7B2%7D%5D)

:150°or 
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<u>is</u><u> </u><u>a</u><u> </u><u>required</u><u> </u><u>answer</u><u>.</u>