Algebra 1

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

Chapter 5 - Linear Functions - 5-5 Standard Form - Practice and Problem-Solving Exercises - Page 324: 38

Answer

$12x+15y = 120$ Thee combinations: no shirts and 8 sweatshirts, 10 shirts and no sweatshirts, 5 shirts and 4 sweatshirts
1526140438

Work Step by Step

12 per shirt, 15 per sweatshirt, 120 to spend $12x+15y = 120$ Let x = 0: $12*0 + 15y = 120$ $15y = 120$ $15y/15 = 120/15$ $y = 8$ Let y = 0: $12x + 15*0 = 120$ $12x = 120$ $12x/12 = 120/12$ $x = 10$ Let x = 5: $12*5 + 15y = 120$ $60 + 15y = 120$ $60 + 15y -60 = 120-60$ $15y = 60$ $15y/15 = 60/15$ $y =4 $
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