1.) 3/2+1/3=1/x x=?
4.) x-2/x+4=x+3/x+1 x=?
5.) 5/x-3+2/x+3=-5x/x^2-9 x=?
6.) 2- a-1/a+2=a^2-1/a+2 a=?
7.) (4a-3)=a+13/a+1 The solutions is ?
8.) Jack usually mows his lawn in 4 hours. Marilyn can mow the same yard in 5 hours. How much time would it take for them to mow the lawn together? (Simplify your answer. Type integer, proper fraction, or mixed number.)
9.)The speed of a passenger train is 10 mph faster than the speed of a freight train. The passenger train levels 280 miles in the same time it takes the freight train to travel 230 miles. Find the speed of each train.
What is the speed of the passenger train?
What is the speed of the freight train?
10.)A long distance rucker traveled 200 miles in one direction during a snow storm. The return trip in rainy weather was accomplished at doublethe speed and took 5 hours less time. Find the speed going.
The speed going was ? mph.
11.) A black racer snake travels 36.8 km in 16 hours. What is the speed in km/h? (Round to the nearest tenth.)
12.) There are approximately 4 lbs of muscle for every 7 lbs of body weight of a certain animal. For a 196-lb animal, how much of the weight is muscle?
13.) 10cm^3 of a normal specimen of human blood contains 1.2 g of hemoglobin. How many grams does 39 cm^3 of the same blood contain?
14.) It is known tha tmaking 1 lb of honey requires 20,000 trips by bees to flowers to gather nectar. How many pounds of honey would 65,000 trips produce?
15.) Last season, a major league baseball player got 100 hits in 200 times at bat. If the player expects to bat 500 times in the entire season with the same ratio of its toat bats, how many hits can the player expect to have?
17.) A sample of 148 firecrackers contained 3 duds. How many duds would you expect in a sample of 1628 firecrackers?
19.) Find the variation constant and an equation of variations where y varies directly as x and y=27 when x=3
The variations constant is k= ?
20.) The number N of aluminum cans used each year varies directly as the numer of people P using the cans. If 55 people use 19,965 cans in one year, how many cans are used in a city which has a population of 1,198,000?
21.) Hooke's Law. The distance d when a spring is stretched by a hanging object varies directly as the weight w of the object. If the distance is 55 cm when the weight is 3kg, what is the distance when the weight is 7kg? (Type an integer or a simplified fraction.)
22.) Find the variation constant and an equation of variation where y varies inversely as x and y=9 when x=17. The variation constant is ?
23.) It takes 9hr for cooks to prepare the food for a wedding rehearsal dinner. How long will it take 5 cooks to prepare the dinner? (Round to the nearest tenth.)
24.) The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car traveling 50 mph can stop in 140 ft, how many feet will it take the same car to stop when it is traveling20 mph? IT will take ? ft. (Simplify answer. Type integer or fraction.)
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- Posted on Jul 23, 2010 at 1:55:22PM