Check my answer plz!Ill medal!
A miner descended 1200 feet into a mine. While in the mine, he then rose 900 feet and then descended 350 feet. What was the miner's net gain or loss in altitude?
A. –650 ft
B. 50 ft
C. –1200 ft
D. 650 ft (I pick D)

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not quite, check your sign

A then

-1200
+900
-350
= ?

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