Answer:
58
Step-by-step explanation:
The submarine is below the sea level by 40 meters. Then, it goes up by 12. That means 40-12=28. The submarine goes 30m down again which means 28+30=58
Answer: thank you
Step-by-step explanation: have a good day :)
Answer:
X^2+3X-10
Step-x^2by-step explanation: