Which fraction is equivalent to 4/-9 ? a) -4/9 b) 4/9 c) -4/-9 d) 9/4

Need solving this second acceleration problem.

Is this a polynomial function? i need to know asap

The following division is being performed using multiplication by the reciprocal find the missing numbers is 5/12 divided by x/3 equals 5/12 times x/10 equals 1/x