SAT Subject Test Mathematics Level 1

18 . A

Express the first   factor, with    the common  denominator of  x,  to  get

Factor  the numerator:

When    this    factor  is  multiplied  by  the second, the (x  +   1)  term    will    cancel

to  get

19 . B

Divide  this    polynomial  using   long    division:

The remainder   is  given   as  4,  so  k   −   20  =    4 ,    and k   =   24.