1) A submarine is diving at a rate of -10 meters per minute. If it starts at a depth of 50 meters below sea level, how long will it take for the submarine to reach the surface? 2) A football team loses 5 yards on one play and then gains 8 yards on the next play. If they started at the 20-yard line, what yard line are they on now? 3) A temperature drops by 15 degrees Celsius in the morning and then rises by 10 degrees Celsius in the afternoon. If the initial temperature was 25 degrees Celsius, what is the final temperature? 4) A bank account has a balance of -$50. If a deposit of $30 is made, what is the new balance? 5) A car travels 40 miles per hour for 2 hours and then slows down to 30 miles per hour for the next 3 hours. What is the total distance traveled by the car?
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