1. 5^-2
2. ( -3)^-4
3. simplify:
27 x a^-4/12 x 4^-3 x a^-5

Write a story that matches with the expression 42x-5 pls hurry

20.ju inces. which ordered pair is a viable solution if x represents the number of books he orders and y represents the total weight of the books, in ounces? (-3,-18) (-0.5, -3) (0,0) (0.5, 3)

Which best describes the function on the graph? direct variation; k = −2 direct variation; k = -1/2 inverse variation; k = −2 inverse variation; k = -1/2