Number Line Question?

0 ⤊

Number Line Question?

On a number line graph the domain of the function v defined by

v(x)=SQR(5x+40)

Can someone help me out by explaining where the end points should go? I'm given a graph in my book with points between -11 and 11 so I know it has to fall in there somewhere...

Thanks!

2007-04-16 14:58:44 · 2 answers · asked by nghek 3 in Science & Mathematics ➔ Mathematics

2 answers

5x+40>=0

x>=-8

2007-04-16 15:03:18 · answer #1 · answered by iyiogrenci 6 · 0⤊ 0⤋

V(x) = SQR (5x + 40)

endpoints are when v(x) = 0

sqr (5x + 40) = 0
5x + 40 = 0
5x = -40
x = - 8

2007-04-16 22:07:12 · answer #2 · answered by Brian F 4 · 0⤊ 0⤋