Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 11 - Rational Expressions and Functions - 11-5 Solving Rational Equations - Practice and Problem-Solving Exercises - Page 684: 42


$15 \space ohm$

Work Step by Step

Since, the resistances are connected in series combination. Formula to calculate the total resistance, we have $R_{total}=R_1+R_2$ As we are given that $R_1=5 \space ohm$ and $R_{total}=20 \space ohm $ Thus, $20=5+R_2$ $R_2=20-5=15 \space ohm$
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