Find all values of the variable for which the rational expression is undefined.
-$\frac{x-4}{7-x}$
A) 7,4
B) None
C) 7
D) -7

Name: Find all values of the variable for which the rational expression is undefined. -$\frac{x-4}{7-x}$ A) 7,4 B) None C) 7 D) -7
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Question

Quizplus · Accepted Answer

A rational expression is undefined when its denominator is equal to zero. In this case, the denominator is $7-x$. Setting $7-x = 0$ gives $x = 7$, making option C correct.

Find All Values of the Variable for Which the Rational x−47−x\frac{x-4}{7-x}7−xx−4​

Find All Values of the Variable for Which the Rational $\frac{x-4}{7-x}$