1. There are 520  animals on a farm. Three-fourths of them are cows. Of the cows, about 90% are white. How many cows on the farm are not white?   130   38   390   51   351   Hint Half-n-half Clue   2. If x is negative and (x - 3)2 = 36, then x2 is equal to   9   -3   81   9   39   Half-n-half Clue   3. If a line segment is drawn connecting point A (-3, 6) and point B (9, -10), then the coordinates of the midpoint are   (-16, 12)   (6, -4)   (3, -2)   (-2, 3)   (12, -16)   Half-n-half Clue   4. A university has 3000 graduate students. The number of undergraduate students is 7  / 6  times the number of graduate students. What fraction of the students in the university are undergraduates?   6 / 13   13 / 7   13 / 6   7 / 13   7 / 6   Half-n-half Clue