Find $\left(\frac{2}{7}\right)^{-3}$

Mindy bought 5/8 pound of almonds and a 3/4 pound of walnuts. which pair of fraction cannot be used to find how many pounds of nuts she bought in all.

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2