Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 8 - Section 8.2 - The Quadratic Formula - Exercise Set - Page 610: 106

Answer

FALSE Solve for $t$: $s = -16t^2 + v_0t$. Cannot be solved because there are too many variables $(t,v_0,s)$ in the equation. Rewrite the equation to solve for $t$. $s = -16t^2 + st$ $-16t^2 + st-s=0$ Using the quadratic formula: $x = \frac{-b±\sqrt{b^2-4ac}}{2a}$ $a=-16$, $b=s$, $c=-s$ $x = \frac{-s±\sqrt{s^2-(4⋅-16⋅-s)}}{2⋅-16}$ $x = \frac{-s±\sqrt{s^2-(64s)}}{-32}$ $x = \frac{-s±\sqrt{s^2-64s}}{-32}$

Work Step by Step

Solve for $t$: $s = -16t^2 + v_0t$. Cannot be solved because there are too many variables $(t,v_0,s)$ in the equation. Rewrite the equation to solve for $t$. $s = -16t^2 + st$ $-16t^2 + st-s=0$ Using the quadratic formula: $x = \frac{-b±\sqrt{b^2-4ac}}{2a}$ $a=-16$, $b=s$, $c=-s$ $x = \frac{-s±\sqrt{s^2-(4⋅-16⋅-s)}}{2⋅-16}$ $x = \frac{-s±\sqrt{s^2-(64s)}}{-32}$ $x = \frac{-s±\sqrt{s^2-64s}}{-32}$
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