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What is the value of 12x^-3 y^-1 for x=-1 and y=5
A.-12/5
B.-180
C.-60
D.-5/12
This is the only question I've ever had like this, have no clue what it means so please help.
please I need to get this turned in ASAP it's the only one I don't know, I've tried everything else, and I don't want to risk it by guessing.

Respuesta :

Answer:

A p

Step-by-step explanation:

We have

[tex]12x {}^{ - 3} y {}^{ - 1} [/tex]

Remeber that

[tex]x {}^{ - n} = \frac{1}{x {}^{n} } [/tex]

[tex]12 \frac{1}{x {}^{3} } \frac{1}{y {}^{1} } [/tex]

Now, plug in

So now we plug in -1 for x and 5 for y

[tex]12 \frac{1}{ { - 1}^{3} } \frac{1}{5 {}^{1} } [/tex]

Simplify

[tex] - \frac{12}{5} [/tex]

A is the answer.

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