What is the value of 12x^-3y^-1 for x=-1 and y = 5?
A. - 12/5
B. -180
C. -60
D. - 5/12
A. - 12/5
Plugging in the values of x = -1 and y = 5 into the expression:
12(-1)^(-3)(5)(-1)^(-1)
= 12(-1)^(-3)(5)(-1)
= 12(-1)(5)(-1)
= -60
Therefore, the value of 12x^-3y^-1 for x=-1 and y = 5 is -60, which is equivalent to -12/5.