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Marianna [84]
3 years ago
14

PLEASE HELP SO I CAN GO EAT LUNCH!!

Mathematics
1 answer:
DENIUS [597]3 years ago
8 0

Answer:

Average low temp. = 6.  The fourth number is 9.

Step-by-step explanation:

To find the average of 7 low temperatures, add them and divide the sum by 7.

Average low temp. = (5 + 8 + 6 + 5 + 10 + 7 + 1) / 7 = 42 / 7 = 6

The mean is the average.  Call the missing number  x.

There are four numbers, three of which are given.  Add all the number, including the unknown  x, then divide the sum by 4.  The result is 7 (given in the problem).

\frac{5+7+7+x}{4}=7\\\frac{19+x}{4}=7\\19+x=28\\x=9

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