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White raven [17]
2 years ago
15

Solve xy − 2 = k for x.

Mathematics
1 answer:
MA_775_DIABLO [31]2 years ago
6 0
Isolate x
So xy - 2 = k
Then
xy = k + 2

x = (k+2)/y
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A.Mary wrote all the integers from 1 to 19. How many numbers did she write?
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The numbers from 1 to 9 have one digit and from 10 to 99 have two digits

A.

∵ Mary wrote all the integers from 1 to 19

∵ (19 - 1) + 1 = 19

∴ She wrote 19 numbers

B.

∵ Rena wrote all the integers from 1 to 12

∵ (12 - 1) + 1 = 12

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C.

∵ Mary wrote all the integers from 1 to 19

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∵ There are 9 numbers from 1 to 9 because (9 - 1) + 1 = 9

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∵ There are 10 numbers from 10 to 19 because (19 - 10) + 1 = 10

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