Answer
Please see the screenshots.
Work Step by Step
The second screenshot shows the x-intercept.
$y=0$
$y=1/2*x-15$
$0=1/2*x-15$
$0+15=1/2*x-15+15$
$15=1/2*x$
$15*2=1/2*2*x$
$30=x$
$(30,0)$ is the x-intercept.
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Appendix H - Exercise Set - Page 1021: 25
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