?In Exercises 75–86, solve the problem by writing a sum of signed numbers and adding.On
Chapter 1, Problem 82(choose chapter or problem)
In Exercises 75–86, solve the problem by writing a sum of signed numbers and adding.
On a certain morning the temperature at 6:00 A.M. is 4°C. Two hours later the temperature has fallen 9 degrees, and 3 hours after that it has risen 2 degrees. What is the temperature at 11:00 A.M.?
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