38 (average) - 29.777 (this year) = 8.223 inches less this year than the average year.
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Answer:
136 °
Step-by-step explanation:
Lets change x²=y, so we have equation y²+6y-7=(y-1)(y+7)
make change back so (y-1)(y+7)= (x²-1)(x²+7)=(x²-1²)(x²+7)=(x+1)(x-1)(x²+7)
