SAT Subject Test Mathematics Level 1

have    is  300 kilometers.)    For the first   d   kilometers, Rachel  drives  at  x

kilometers  per hour.

Distance    equals  rate    times   time,   so  time    equals  distance    over    rate,   and

the time    for the first   leg is   hours.

For the next    2d kilometers,  Rachel  drives  at  y   kilometers  per hour,   so  the

time    for the second  leg is   hours.

8 . D

This    is  a   permutations    question    with    a   twist.  Think   of  it  as  the

arrangement of  five    items:  three   distinct    people  and two

indistinguishable   nonpersons.