Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 3 Linear Systems and Matrices - Graphing Calculator Activity - 3.1 Graph Systems of Equations - Practice - Page 159: 7

Answer

$4$ days in San Antonio and $3$ days in Dallas.

Work Step by Step

Assume the number of days spent in San Antonio is $x$. Then the number of days spent in Dallas is $7-x$. Then our equation is: $275x+(7-x)400=2300\\275x+2800-400x=2300\\-125x=-500\\x=4$. Thus we should spend $4$ days in San Antonio and $3$ days in Dallas.
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