3 years ago

What is the vertex of the graph of the function f(x) = x2 + 8x − 2 ?

Mathematics

2 answers:

yan [13]3 years ago

8 0

It’s -4,-18 the is for sure the right answer

scoundrel [369]3 years ago

7 0

Thé vertex of the graph of the following function f(x)=x2+8x-2 is (-4,-18).

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iDentify the equation of the circle that has its center at (-27, 120) and passes through the origin A. (x−27)2+(y+120)2=123 B. (

melomori [17]

The equation of a circle is given in the form $(x-a)^2+(y-b)^2=r^2$ , where

(a, b) is the centre of the circle
r = radius

We have the centre of the circle (-27, 120)
We can work out the radius by modelling the radius as the hypotenuse of a triangle as shown in the diagram below

$r^2=27^2+120^2$
$r^2 = 15129$

The equation of the circle is

$[x-(-27)]^2+[y-120]^2=15129$
$[x+27]^2+[y-120]^2=15129$

Correct answer: option number 4