Which image (a'b'c'd') of  abcd  cannot be produced using only reflections? 

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

What is the equation of the line that is parallel to the line with the equation y= -3/4x +1 and passes through the point (12,-12)