Question

Just help me please

Answer 1

Just download photo math, it’s super easy and the answers are always right

Answer 2

$\left( \dfrac{4}{5} \right)^{-3}$

There are a few ways to approach this.  

My preference is to apply that -3 exponent to both the top and the bottom:

    $\left( \dfrac{4}{5} \right)^{-3} = \dfrac{4^{-3}}{5^{-3}}$

I'd do that the same way, no matter whether the exponent outside was a postive or negative number.

Since it is a negative number, I remember that negative exponents mean that factor is on the wrong side of the fraction.  So anything with a negative exponent will move to the other side.  

    $\dfrac{4^{-3}}{5^{-3}} = \dfrac{5^3}{4^3}$

Be sure to make the exponents' signs change when you move them to the other side of the fraction.

Finally I would evaluate $5^3$ and $4^3$ on their own to get my answer.

    $\dfrac{5^3}{4^3} = \dfrac{5 \cdot 5 \cdot 5}{4\cdot 4 \cdot 4} = \dfrac{~~~?~~~}{?}$