1. If x + y = 16 and 4 x - y = 14, then x - y is equal to   -34   16   -4   4   0   Hint Half-n-half Clue   2. There are 560  animals on a farm. Three-fourths of them are cows. Of the cows, about 30% are white. How many cows on the farm are not white?   392   294   420   140   126   Half-n-half Clue   3. Pineapples cost 40  cents each, whereas pears cost 80  cents a dozen. A litre of fruit punch requires 1/4  of a pineapple and 3  pears. How many dollars will it cost to make 7  litres of fruit punch?   2.57   None of these   17.50   0.30   2.10   Half-n-half Clue   4. 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?   3a2/2   a3b/2   a2 + ab/2   2a3b   2a2/3   Half-n-half Clue