melindarobinson melindarobinson 21-01-2021 Mathematics contestada Simplify the expression so there is only one positive power for the base, -5 -5 power of 7 / -5 power of 2 A. 1/5 power of 9 B. -5 power of 3 C. -5 power of 5 D. 1/5 power of 5