1.  Consider a square with side of length a, and an an isosceles right triangle with one side of length a and hypotenuse of length b. What is the sum of the areas of the square and the triangle? 

Hint
Halfnhalf Clue
 

2.  A university has 3000 graduate students. The number of undergraduate students is 6 / 5 times the number of graduate students. What fraction of the students in the university are undergraduates? 
 Halfnhalf Clue
 

3.  There are 680 animals on a farm. Threefourths of them are cows. Of the cows, about 50% are white. How many cows on the farm are not white? 
 Halfnhalf Clue
 

4.  If 6 x + 3 y = 66 then 30 x + 15 y is equal to 
 Halfnhalf Clue
 
