1. If the base of a triangle is decreased by 30%, and its height is increased by 30%, then the area of the triangle   remains unchanged   increases by 30%   decreases by 9%   decreases by 51%   decreases by 30%   Hint Half-n-half Clue   2. Mr. Haqim drove from Hat Hill to Capsville in 95  minutes at an average speed of 50  miles per hour. In about how many minutes should he make the return journey so that his average speed for the entire journey is 55  miles per hour?   172   114   cannot be determined   104   77   Half-n-half Clue   3. If 3 x + 2 y = 12 then 9 x + 6 y is equal to   60   12   36   none of these   48   Half-n-half Clue   4. A particular model of an air-conditioner cost $ 800 five years ago. The same model costs $ 1120 today. By what percent has the cost increased?   40   111   11   140   108   Half-n-half Clue