Answer
33 degrees Fahrenheit
This matches the graph.
Work Step by Step
$f(x)= 3x^2-18x+57$
Thursday is four days after Sunday
$f(x)= 3x^2-18x+57$
$f(4)= 3*4^2-18*4+57$
$3*16-72+57$
$48-15$
$33$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 11 - Section 11.2 - Solving Quadratic Equations by Completing the Square - Exercise Set - Page 780: 85
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