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zavuch27 [327]
3 years ago
7

Which sentence is incorrect?

Mathematics
2 answers:
Olin [163]3 years ago
8 0
C is the incorrect sentence.
Anna [14]3 years ago
3 0
Both C and D are incorrect.

-2.5 is greater than -3 (-2.5 > -3)

-2/5 = -0.4, not 0.4
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<u>Answer:</u>

x = 4 (extraneous solution)

<u>Step-by-step explanation:</u>

\frac { 4 } { x - 4 } = \frac { x } { x - 4 } - \frac { 4 } { 3 } \\ \frac { 4 } { x - 4 } - \frac { x } { x - 4 } = - \frac { 4 } { 3 } \\ \frac { 4 - x } { x - 4 } = - \frac { 4 } { 3 } \\ 3 ( 4 - x ) = - 4 ( x - 4 ) \\ 1 2 - 3 x = - 4 x + 1 6 \\ 4 x - 3 x = 1 6 - 1 2 \\ x = 4 \\

This solution is extraneous. Reason being that even if it can be solved algebraically, it is still not a valid solution because if we substitute back x=4, we will get two fractions with zero denominator which would be undefined.

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3 years ago
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Vilka [71]

Hi!

<h3>To find the prime factorization of a number, keep dividing by the smallest factor that goes into it. </h3>

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Hope this helps! :)

-Peredhel

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