(x+16)(x-12)(x+2)>0

- anonymous

(x+16)(x-12)(x+2)>0

- jamiebookeater

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- anonymous

2x(8-6+1)>0

- anonymous

(x>0)2(8-6+1)

- Mertsj

Make a sign graph of the factors. Do you need me to demonstrate?

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## More answers

- anonymous

I believe the answer would be all real numbers because if any negative numbers are used they would be less than 0, not greater than.

- Mertsj

|dw:1327194029245:dw|

- Mertsj

The chart shows that the factor x+16 is negative to the left of -16 and positive to the right.

- Mertsj

Do you understand that?

- anonymous

|dw:1327194152861:dw|

- Mertsj

Ok, Walee, balaa wants to take over now. I'll let him explain it to you.

- anonymous

|dw:1327194276321:dw|

- anonymous

Ok so I don't have to multiply them at all?

- anonymous

Yes

- anonymous

Have you got it ?

- anonymous

No, I do understand what is being said but I don't understand how.

- Mertsj

Do you want me to explain it ?

- anonymous

Yes, please. I don't multiply those three together?

- Mertsj

In this problem you have three factors to multiply and the problem says that if you multiply them the result will be positive. Do you understand that?

- anonymous

Isk that because it has to be > 0?

- Mertsj

Yes

- Mertsj

And no you don't multiply them together.

- anonymous

One of the choices of answers I had was all natural numbers. Would that be correct?

- Mertsj

No

- Mertsj

If you multiply 3 numbers and get a positive answer that can only happen in two ways:
All three factors are positive OR
Exactly 2 factors negative and 1 positive

- anonymous

Ok, maybe you can help me with this one. I need to make this problem into decimal places. The square root of 25/48=T, I am trying to find the hang time of a basketball player from the vertical leap 25 inches, the function is V=48T^2

- Mertsj

divide 25 by 48 on your calculator and then hit the square root button

- Mertsj

T=.721689836

- anonymous

That is not what my calculator just gave me? Do I need to do this problem on a scientific calculator?

- Mertsj

No. Perhaps you need to enter it in a different order. Calculators vary. So try this: Push the square root key and then enter (25 divided by 48) equals

- anonymous

I tried it on the scientific calcualtor on my computer and still came up with the same. Can you check your answer for me please?

- Mertsj

You can check my answer. Just multiply .721687836 by itself and see if you get the same thing as when you divide 25 by 48

- anonymous

I did on my cell phone calculator and got what you got. This is funny...

- Mertsj

Define funny

- anonymous

Just a smile.

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