Question

I need help.

Answer 1

What is the discontinuity of the function f(x) = the quantity of x squared minus 3 x minus 28, all over x plus 4?
I am new and would like to know if anyone could help, please?

Answer 2

Well, when x=-4, the denominator becomes zero. So the function is discontinuous at x=-4

Answer 3

Can you help me with some more please ?

Answer 4

Well, discontinuity is where the function is undefined, cusps, jumps, etc. If you could not draw the function on a coordinate plane without lifting your pencil or stopping sharply, it is discontinuous. The function has an asymptote at x=-4, because of the divide by zero that happens there. so the function is discontinuous at x=-4

Answer 5

What are the zero(s) of the function f(x) = the quantity of 4 x squared minus 36 x, all over x minus 9?
x = -9

x = 0

x = 9

x = 0 and x = 9
I thought the answer was x=9

Answer 6

(4x^2-36x)/(x-9)
4(x^2-9x)/(x-9)
\[\frac{ 4x(x-9) }{ (x-9) }=4x\]
The answer is zero

Answer 7

The function does not exist at x=9

Answer 8

wow, that makes more sense. My next two problem is graphs. It's asking which graph represents the function. Would a picture help ?

Answer 9

Hello?

Answer 10

Sure
pictures would help

Answer 11

Do you know how I could draw on here ? :(

Answer 12

The function is f(x) = the quantity of 9 x squared plus 9 x minus 18, all over 3 x plus 6

Answer 13

Send me a screen shot. My email is gary.l.collins@gmail

Answer 14

\[\frac{ 9x^2+9x-18 }{ 3x+6 }=\frac{ 3(x^2+x-2) }{ x+2 }=\frac{ 3(x+2)(x-1) }{ x+2 }\]
Since you can cancel out the x+2 from top and bottom, the function will behave like 3x-3, except for at the point -2, because the function is discontinuous at -2. It will have a hole in the line at that point.

Answer 15

So the answer should be -2? I tried that and it told me it was wrong

Answer 16

They said it was incorrect

Answer 17

What was it asking for?

Answer 18

Exactly what your're saying be when i put that the first time i got it incorrect.For the answer choice they have -2, 12, -8, and 2. I'm assuming where the holes are at is the answers

Answer 19

Are you sure it is 3x+6 on the bottom?

Answer 20

Positive

Answer 21

Well. Then I do not know what it wants.