Suppose you want to play four music cds at your party. how many different orders can you
choose to play them?
a) 16
b) 24
c) 9
d) 25

What number is 7 units left of -15?

On ryan's last social studies test there were two types of questions true/false worth 3 points each and multiple choice questions worth 4 points each

Bc and bd are opposite rays. all of the following are true except a)a,b,c,d are collinear b)a,b,c,d are coplanar c)bc=bd d)b is between c and d