Answer
70 degrees, 70 degrees, 100 degrees, 120 degrees
Work Step by Step
$s+s+m+l=360$
$s+30=m$
$s+50=l$
$s+s+(s+30)+(s+50)=360$
$2s+s+30+s+50=360$
$4s+80=360$
$4s=280$
$4s/4=280/4$
$s=70$
$70+30=100$
$70+50=120$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 9 - Section 9.2 - Integrated Review - Systems of Linear Equations - Page 650: 15
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