a small submarine is at an elevation of -30 feet compared to sea level. what is its elevation after it ascends 9 feet? PLEASE HELP!!!!!!!!!!!!!!!!!!!!!! WILL GIVE BRAINLIEST AND 5 STAR TO WHOM WHO ANSWERS IT CORRECTLY!!!!!!!!!!!!!!!!!!!!!!!!!!!! NO GUESSES!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Respuesta :

Answer:

-21 feet

Step-by-step explanation:

-30 + 9 = -21

Answer:

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-21 feet

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