## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson

# Chapter 6 - Rational Expressions and Equations - 6.1 Rational Expressions - 6.1 Exercise Set - Page 379: 13

#### Answer

$t=5$

#### Work Step by Step

A rational function is undefined whenever the denominator equals 0. To make the function undefined, set $3t-15$ equal to 0. We can easily see that the value that makes this true is $t = 5$. Find this by adding 15 to each side and then dividing by 3.

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