harisnaveed235
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You can model the entrance to a mine shaft using the equation
y = − [tex] \frac{1}{2} [/tex]2 (x + 4)(x − 4), where x and y are measured in feet. The x-axis represents
the ground. Find the width of the entrance at ground level.

NEED QUICK ALL POINTS AT RISK 99 POINTS QUICK

Respuesta :

musiclover10045

y=-1/2 2 (x+4)(x+-4+

-1/2*2 = -1

y=-1(x+4)(x-4)

solving for x

x - -4 and x =4

-4 to 4 = 8 feet

 width = 8 feet

Astute
Hey there,

You can model the entrance to a mine shaft using the equation
y = − 2 (x + 4)(x − 4), where x and y are measured in feet. The x-axis represents
the ground. Find the width of the entrance at ground level. 

Based by looking on this question above, your correct answer would be . . .

[tex]\boxed{y=8}[/tex] and [tex]\boxed{x=-1}[/tex]

Hope this helps.
~Jurgen

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