Answer
$\frac{7}{20}$
Work Step by Step
If a=10, and b=-7, in order to evaluate the expression $\frac{-b}{2a}$ all we must do is simply plug in the givens into the expression.
$\frac{-b}{2a}$=$\frac{-(-7)}{2(10)}$=$\frac{7}{20}$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 9 - Quadratic Functions and Equations - 9-1 Quadratic Graphs and Their Properties - Mixed Review - Page 540: 63
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