In a lab, the temperature of various chemical reactions is changing by a fixed number of degrees per minute. Write a numeric expression that describes each of the following:
a. The temperature at 8:00 a.m. is –5˚C. If it increases by d degrees per minute, what will the temperature be m minutes later?
b. The temperature at 8:00 p.m. is 0˚C. If it has been dropping by d degrees per minute, what was the temperature m minutes before?
c. The temperature at 8:00 p.m. is 20˚C. If it has been increasing every minute by d degrees, what was the temperature m minutes before?
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