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Alex73 [517]
3 years ago
10

After reading a low of -16°F at 10 P.M.,

Mathematics
2 answers:
Rus_ich [418]3 years ago
6 0
The temperature would be -7 degrees
romanna [79]3 years ago
3 0

Answer:

-7

Step-by-step explanation:

First determine the number of hours that have past from 10PM to 1 AM

10PM to 11 PM is 1 Hour

11PM to 12 AM is 1 Hour

12AM to 1 AM is 1 hour

for a total of 3 hours

Next multiply the average number of degrees the temperature is rising by the number of hours that passed

3 x 3 =9 which is the total number of degrees the temperature has risen by.

Now add 9 to -16

-16 + 9 = -7

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Select the assumption necessary to start an indirect proof of the statement. If 3a+7 < 28, then a<7.
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When applying indirect proofs, we assume the negation of the conclusion is true, and show that this assumption would lead to nonsense, or contradiction.

In our case we assume a is not smaller than 7, that is we assume a≥7.

a≥7 then, multiplying both sides by 3:
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3a+7≥28,

which is a contradiction because 3a+7 is smaller than 28.

So our assumption is wrong, which means the opposite of it is correct.


Answer: assume a≥7
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Step-by-step explanation:

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