Algebra 1

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

Chapter 9 - Quadratic Functions and Equations - Chapter Test - Page 593: 21


$(4,5)$ and $(-12,85)$

Work Step by Step

$y=x^2+3x-23$ and $y=25-5x$ $x^2+3x-23=25-5x$ $x^2+8x=48$ $x^2+8x-48=0$ $x^2+12x-4x-48=0$ $x(x+12)-4(x+12)=0$ $(x-4)(x+12)=0$ $x-4=0$ $x=4$ $x+12=0$ $x=-12$ $y=25-5x$ $y=25-5*4$ $y=25-20$ $y=5$ $y=25-5x$ $y=25-5*(-12)$ $y=25-(-60)$ $y=85$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.