1.  Mr. Kennedy bought 600 shares of ABC Inc. in 1994 at a price of $ 5 for each share. He sold all these shares yesterday for 70% more than he paid for them. If he has to pay a tax of 30% on the gain, how many dollars does he pay as tax? 

Hint
Halfnhalf Clue
 

2.  If x is negative and (x  4)^{2} = 100, then x^{2} is equal to 
 Halfnhalf Clue
 

3.  If the base of a triangle is decreased by 30%, and its height is increased by 30%, then the area of the triangle 
 Halfnhalf Clue
 

4.  If 3 x + 2 y = 47 then 18 x + 12 y is equal to 
 Halfnhalf Clue
 
