Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 4 - Section 4.3 - Systems of Linear Equations and Problem Solving - Exercise Set - Page 234: 57

Answer

$(7,215)$

Work Step by Step

Since both equations equal $f(x)$. Thus, we set the equations equal to each other: $$ -8.6x +275 = 204.9x-1217 \\213.5 x = 1492 \\ x= 7$$ Thus: $$ f(x) =(-8.6)(7) + 275\\ f(x)= 215$$
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