Answer:
so $21+45%=30.45. meaning that pair of boots cost 30.45 so two pairs of boots would cost $60.90
Yes, there is an expanded algorithm for synthetic division involving nonlinear and non-monic divisors (check out the w.i.k.i.pedia page on "synthetic division", under the "Expanded sythetic division" section).
z equals -1 because 8 time negative one equals negative 8 plus 8 equals 0
$1.80 if the question was ( he would have 3/5 of the amount he started with)
