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the temperature of water in a lake at 9 a.m. is -2.6 by noon the temperature of the water rises by 5.1 Celsius by 9 p.m. the temperature of the waterfalls by 12.8 from what it had been at noon right in addition problem to represent the change in temperature of the water and find the temperature of the water at 9 p.m.​

Respuesta :

Answer:

-2.6 + 5.1 = 2.5

2.5 + (-12.8) = -10.3

Step-by-step explanation:

At 9 am your temperature is -2.6 Celsius. By noon your temperature rises 5.1 degrees Celsius. So you take -2.6 + 5.1 or 5.1 - (-2.6) which is 2.5. Your temperature at noon is 2.5 degrees Celsius. Then by 9 pm the temperature drops 12.8 degrees Celsius. So you take your 2.5 degrees and subtract 12.8 degrees 2.5 - 12.8 or 2.5 + (-12.8) which equals -10.3.

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