Question

Help please!
I cant type it so the picture is posted below.

Answer 1

any thoughts about it?

Answer 2

Not really. Its just the negative part that's confusing me.

Answer 3

well, can it be 7 or 1/7? or can we rule those out?

Answer 4

I think we could rule them out.

Answer 5

me too, so the remaining two options are the same, except for sign.

what does a ^2 result in? is it always positive? or do we have to concern ourselves with a negative?>

Answer 6

site lag .......

Answer 7

I'm dont think we have to worry about the negative but I'm really not sure.

Answer 8

just for the sake of knowing properties of negative exponents ....
\[n^{-2}=\left(\frac1n\right)^2\]

Answer 9

a number that is squared is always positive.

(-1)^2 = 1
(-2)^2 = 4
(-3)^2 = 9

etc ...

Answer 10

So I could just kind of ignore the negative?

Answer 11

in this case, with the options already giving you a correct answer to pick, yes

Answer 12

So it would be the first choice then?

Answer 13

if we wanted to work the mathing

\[(7^3)^{-2}\]
\[(7.7.7)^{-2}\]
\[(\frac{1}{7.7.7})^{2}\]
\[(\frac{1}{7.7.7})(\frac{1}{7.7.7})\]
\[\frac{1}{7.7.7.7.7.7}\]

Answer 14

the first choice looks good yes

Answer 15

Thank you for helping me and explaining it! ^-^

Answer 16

youre welcome, and good luck