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Point (x, y) has in which quadrant of the rectangular coordinate system shown above ？（）
(1)x+y＜0
(2)x=1 and y=-7

How many liters of pure alcohol must be added to a 100-liter solution that is 20 percent alcohol in order to produce a solution that is 25 percent alcohol ？（）

The markup on a television set is 20 percent of the cost. The markup is what percent of the selling price ？（） (mark up=selling price-cost)

Mary invested $8,400 for 6 months in a certificate of deposit paying  percent simple annual interest. How much more interest would Mary have received if the interest rate on this certificate had been 9  percent simple annual interest ？（）

A 5-liter jug contains 4 liters of a saltwater solution that is 15 percent salt. If 1.5 liters of the solution spills out of the jug, and the jug is then filled to capacity with water, approximately what percent of the resulting solution in the jug is salt ？（）

If  of the air in a tank is removed with each stroke of a vacuum pump, what fraction of the original amount of air has been removed after 4 strokes ？（）

Harry started a 6-mile hike with a full 10-cup canteen of water and finished the hike in 2 hours with 1 cup of water remaining in the canteen. If the canteen leaked at the rate of 1 cup per hour and Harry drank 3 cups of water during the last mile, how many cups did he drink per mil during the first 5 miles of the hike ？（）

If money is invested at r percent interest, compounded annually, the amount of the investment will double in approximately  years．If Pat’s parents invested $5,000 in a long-term and that pays 8 percent interest, compounded annually, what will be the approximate total amount of the investment 18 years later, when Pat is ready for college ？

If tank X contains only gasoline, how many kiloliters of gasoline are in tank X ？（）
(1)If  of the gasoline in tank X were pumped out the tank would be filled to  of its capacity.
(2)If 0.75 kiloliter of gasoline were pumped into tank X, it would be filled to capacity.

Laura borrowed $240, interest free, from her parents to pay for her college education. If she pays back  percent of this amount quarterly, and has already paid $42.00, for how many months has she been paying back her loan ？

In the diagram above, points A, B, C, D, and E represent the five teams in a certain league in which each team must play each of the other teams exactly once. The segments connecting pairs of points indicate that the two corresponding teams have already played their game. The arrows on the segments point to the teams that lost; the lack of an arrow on a segment indicates that the game ended in a tie. After all games have been played, which of the following could NOT be the percent of games played that ended in a tie ？

If the ratio of men to women employed by Company S in 1975 was , what is the ratio of men to women employed by Company S in 1976 ？（）
(1)Company S employed 20 more women in 1976 than in 1975.
(2)Company S employed 20 more men in 1976 than in 1975.

Over the last three years a scientist had an average (arithmetic mean) yearly in come of $45,000. The scientist earned 1  times as much the second year as the first year and  times as much the third year as the first year. What was the scientist’s income the second year ？

During the four years that Mrs. Lopez owned her car, she found that her total car expenses were $18,000. Fuel and maintenance costs accounted for  of the total and depreciation accounted for  of the remainder. The cost of insurance was 3 times the cost of financing, and together these two costs accounted for  of the total. If the only other expenses were taxes and license fees, then the cost of financing was how much more or less than the cost of taxes and license fees ？

A circular rim 28 inches in diameter rotates the same number of inches per second as a circular rim 35 inches in diameter. If the smaller rim makes x revolutions per second, how many revolutions per minute does the larger rim make in terms of x ？（）

On a certain day it took Bill three times as long to drive from home to work as it took Sue to drive from home to work. How many Kilometers did Bill drive from home to work ？（）
(1)Sue drove 10 kilometers from home to work, and the ratio of was the same for Bill and Sue that day.

(2)The ratio of for Sue that day was 64 kilometers per hour.

A, B, and C each drove 100-mile legs of a 300-mile course at speeds of 40, 50, and 60 miles per hour, respectively. What fraction of the total time did A drive ？（）

In year X a total of 355 billion dollars was spent for health care in the United States, 30 percent of which was spent by private health insurance companies. Was the amount spent for health care by the federal government’s medicare program less than 60 billion dollars ？（）
(1)In year X medicare spent more than , but less than , of the amount spent by the private health insurance companies for health care.
(2)In year X medicare spent 50 billion dollars less for health care than the amount spent by private health insurance companies.

Cars Y and Z travel side by side at the same rate of speed along parallel roads as shown above. When car Y reaches point P, it forks to the left at angle x, changes speed, and continues to stay even with car Z as shown by the dotted line. The speed of car Y beyond point P is what percent of the speed of car Z ？（）
(1)the speed of car Z is 50 miles per hour.
(2)x=45

A total of 774 doctorates in mathematics were granted to United States citizens by American universities in the 1972～1973 school year, and W of these doctorates were granted to women. The total of such doctorates in the 1986～1987 school year was 362, and ω of these were granted to women. If the number of doctorates in mathematics granted to female citizens of the United States by American universities decreased from the 1972～1973 school year to the 1986～1987 school year, was the decrease less than 10 percent ？（）
(1)
(2)W=ω+5

In a mayoral election, Candidate X received  more votes than candidate Y, and Candidate Y received  fewer votes than Candidate Z. If Candidate Z received 24, 000 votes, how many votes did Candidate X receive ？

Working independently, Tina can do a certain job in 12 hours. Working independently, Ann can do the same job in 9 hours. If Tina works independently at the job for 8 hours and then Ann works independently, how many hours will it take Ann to complete the remainder of the job ？（）

In a certain animal population, for each of the first 3 months of life, the probability that an animal will die during that month is . For a group of 200 newborn members of the population, approximately how many would be expected to survive the first 3 months of life ？

A sum of $200,000 from a certain estate was divided among a spouse and three children. How much of the estate did the youngest child receive ？（）
(1)The spouse received  of the sum from the estate, and tile oldest child received of the remainder.
(2)Each of the two younger children received $12.500 more than the oldest child and $62,500 less than the spouse.

A milliner bought a lot of hats,  of which were brown. The milliner sold  of the hats including  of the brown hats. What fraction of the unsold hats were brown ？（）

If Mark saved an average (arithmetic mean) of $80 per week for 3 consecutive weeks, how much did he save the second week ？（）
(1)The average amount that Mark saved per week for the first 2 weeks was $60.
(2)The amount that Mark saved the first week was the amount he saved the second week and the amount he saved the third Week.

Mr. Jones drove from Town A to Town B in x hours. On the return trip over the same route, his average speed was twice as fast. Which of the following expresses the total number of driving hours for the round trip ？（）

Seed mixture X is 40 percent ryegrass and 60 percent bluegrass by weight; seed mixture Y is 25 percent ryegrass and 75 percent fescue. If a mixture of X and Y contains 30 percent ryegrass, what percent of the weight of this mixture is X ？（）

A shipment of banners contains banners of two different shapes, triangular and square, and two different colors, red and green. In a particular shipment 26%of the banners are square and 35% of the banners are red. If 60% of the red banners in the shipment are square, what is the ratio of red triangular banners to green triangular banners ？（）

On a certain road, 10 percent of the motorists exceed the posted speed limit and receive speeding tickets, but 20 percent of the motorists who exceed the posted speed limit do not receive speeding tickets. What percent of the motorists on that road exceed the posted speed limit ？（）

Solution Y is 30 percent liquid X and 70 percent water. If 2 kilograms of water evaporate from 8 kilograms of solution Y and 2 kilograms of solution Y are added to the remaining 6 kilograms of liquid, what percent of this new solution is liquid X ？（）

A certain basketball team that has played  of its games has a record of 17 wins and 3 losses. What is the greatest number of the remaining games that the team can lose and still win at leas  of all of its games ？

Four cups of milk are to be poured into a 2-cup bottle and a 4-cup bottle. If each bottle is to be filled to the same fraction of its capacity, how many cups of milk should be poured into the 4-cup bottle ？（）

Forty percent of the rats included in an experiment were male rats. If some of the rats died during the experiment and 30 percent of the rats that died were male rats, what was the ratio of the death rate among the male rats to the death rate among the female rats ？（）

A boy walking along a road at 3 kilometers per hour is overtaken by 3 truck traveling at 40 kilometers per hour. If the truck breaks down 1 kilometer beyond where it passes the boy, how many minutes after the breakdown does the boy reach the truck ？（）

An airline passenger is planning a trip that involves three connecting flights that leave from Airports A, B, and C, respectively. The first flight leaves Airport A every hour，beginning at 8:00 a.m., and arrives at Airport B  hours later. The second flight leaves Airport B every 20 minutes, beginning at 8:00 a.m., and arrives at Airport C  hours later. The third flight leaves Airport C every hour, beginning at 8.45 a.m. What is the least total amount of time the passenger must spend between flights if all flights keep to their schedules ？

A certain shade of gray paint is obtained by mixing 3 parts of white paint with 5 parts of black paint. If 2 gallons of the mixture is needed and the individual colors can be purchased only in one-gallon or half gallon cans, what is the least amount of paint, in gallons, that must be purchased in order to measure out the portions needed for the mixture ？（）

The price per share of stock X increased by 10 percent over the same time period that the price per share of stock Y decreased by 10 percent. The reduced price per share of stock Y was what percent of the original price per share of stock X ？（）
(1)The increased price per share of stock X was equal to the original price per share of stock Y.
(2)The increase in the price per share of stock X was  the decrease in the price per share of stock Y.