(X^-3)^-5x^6
A. X^21
B. X^-21
C. X^48
D. X^-48

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour.what is the cyclist average rate for the round trip in miles per hour ?

3.4a=57.8 what is the the value of a