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Dennis_Churaev [7]
3 years ago
15

The sum of the digits of a certain two-digit number is 12. When you reverse its digits youthe new number is twelve less than twi

ce the original number. What is the number?
Mathematics
1 answer:
Flura [38]3 years ago
5 0

Answer:

54

Step-by-step explanation:

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PLZZ HELPP!!! WILL GIVE BRAINLIEST!!!
lutik1710 [3]

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Step-by-step explanation:

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The correct answer is

2x^2 + 4x - 1 - 9/4x + 1

3 0
4 years ago
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Show that det(A) = 0 without directly evaluating the determinant. A = [-4 1 1 1 1; 1 -4 1 1 1; 1 1 -4 1 1; 1 1 1 -4 1; 1 1 1 1 -
Anuta_ua [19.1K]
You could interpret them as system of equation and answer the question easily

from A 

-4x + y + x + w =1

write in same form from A 

as this system has five variables and four of them are unknowns it means the unique solution is not possible 

So, det (A) = 0



8 0
3 years ago
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If sec(x)=13/12 what is cos(x)?
ohaa [14]
Recall that cosine is the reciprocal of secant, so is the same fraction, just upside-down.
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1/R = 1/A + 1/B assuming that all denominators are non-zero solve for B
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Answer:

1/B = 1/R - 1/A

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