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Word Problems/Questions Answered by Expert Scott A Wilson
| Subject | Date Asked |
| Combinations for 5th grade | 2/6/2012 |
| Q: A grocery clerk sets up a display of oranges in the form of a triangle using 10 oranges at the base ... A: If there is 1 at the top and 10 at the bottom, there are 2, 3, 4, 5, 6, 7, 8, and 9 at each row in ... | |
| translate the problem | 2/1/2012 |
| Q: four less than twice the sum of a number and eleven. A: Let the number be x. When it says, '4 less', that implies there is a -4 in the problem. When it ... | |
| Math-Simple Interest | 1/31/2012 |
| Q: Steve invests part of his money in an account that pays 6% interest per year and part of it in an ... A: If all 10,000 were put in the account at 6%, the interest would be $600. If some money were put in ... | |
| maths-algebra | 1/29/2012 |
| Q: Akim, Katie, Stevie, Udi and Davey had all been to their local pie eating competition and were ... A: It is known that the sum(1 to n) is n(n+1)/2. To show this works, try a few numbers: 1+2 = 3, ... | |
| Business math word problem | 1/25/2012 |
| Q: this is the question and i cannot figure out how to solve it and in what way here it goes. A ... A: If the total time is 3 1/4 hours, that is the same as 13/4 of an hour. If the truck travelled 1/5 ... | |
| Worker-Hours & Hour-Workers | 1/22/2012 |
| Q: If 15 workers can perform a job in 7 hours, 1 worker can perform the job in how many hours? The ... A: It's all in the 2nd line which states, The calculation is 15 workers X 7 hours / 1 worker = 105 ... | |
| Simultaneous equations | 1/21/2012 |
| Q: 1. A certain integer is between 10 and 100. Its value is 8 times the sum of its digits and it it is ... A: 1. Let A and B both be digits. Let the number be AB (the two digits in order, not multiplied). This ... | |
| Worker-Hours & Hour-Workers | 1/20/2012 |
| Q: If 15 workers can perform a job in 7 hours, 1 worker can perform the job in how many hours? The ... A: Note that in the equation, 15 workers X 7 hours / 1 worker = 105 hours, workers is in the numerator ... | |
| Fractional Parts | 1/19/2012 |
| Q: Here are my questions: 15 workers finish a job in 7 days. 1. Each worker performs what fractional ... A: On problems like this, I find it very useful to define what are called widgets. Lets say the job is ... | |
| Math>Algebra | 1/6/2012 |
| Q: How can I, Find the two consecutive positive odd numbers such that the sum of their squares is ... A: Since half of 113 is about 56, and the square of 7 is 49, I would try 7 and 9, which is 49 + 81 = ... | |
| math | 12/4/2011 |
| Q: the range finder on the wildlife film maker's camera told him that the gazelle started 60 leaps a ... A: If the gazelle started 60 leaps in the lead, and they are assumed to be cheetah leaps, then we'll ... | |
| college algebra | 12/4/2011 |
| Q: You plan to invest $40,000 in two funds paying 4.5%and 6% simple intrest. Your goal is to obtain a ... A: If the amount is $40,000 and the interest is $2265, that is 100(2265/40,000) = 5.6625% interest. ... | |
| Rates | 12/3/2011 |
| Q: 15 workers can complete a job in 7 days. 21 workers can finish the job in 5 days. 15 workers X 7 ... A: You've got to keep the units straight. That is correct when you say 105 worker-days means 1 worker ... | |
| Business Math | 12/2/2011 |
| Q: Guitarists hoping for a little country music magic in their playing can now buy an instrument carved ... A: On the side, 243 is recognized as 3^5, for 3*3*3*3*3 = 243. Starting at 1 and continually ... | |
| Business Math | 12/2/2011 |
| Q: Washburn is seeking a Sales and Marketing Coordinator with a bachelor's degree or equivalent ... A: I have found the best place to see taxes is at ... | |
| Rates | 12/1/2011 |
| Q: 15 workers can complete a job in 7 days. 21 workers can finish the job in 5 days. 15 workers X 7 ... A: The 1st problem is done correctly. As for the second problem, if 63 books cost $126, then the books ... | |
| math | 11/30/2011 |
| Q: alex hit four more home runs than twice the number of home runs Nick hit. together they hit 10 home ... A: Nick hit x home runs. Alex hit 2x + 4 home runs. It is given that x + 2x + 4 = 10, so 3x + 4 = 10, ... | |
| Algebra | 11/28/2011 |
| Q: 1. I deposit $3000 in an IRA at 25, the interest is at 8% and my tax bracket is at 40% I decide to ... A: 1. If the interest is 8% per yer, compounded yearly, and only one check for $3000 is deposited, what ... | |
| Business Math | 11/26/2011 |
| Q: A package must weigh at least 151 pounds. It must be palletized, stackable, forklift-friendly and ... A: Package: at least 151 pounds The cargo area at base: <16ft² Height: <= 70" Weight: <=2,200 pounds ... | |
| mathematics | 11/21/2011 |
| Q: what is 58,250 as a mixed number reduced A: The prime factorization gives 58,250 = 2*5*5*5*233. Thus, there are 3 unique prime numbers that can ... | |
| Rates | 11/21/2011 |
| Q: Here are my questions. Note that they are in two parts: [1] If 4 carpenters can build 8 houses in ... A: [1] Right. [2] I believe this is right as well. If it takes 4 carpenters 10 days to build 8 ... | |
| gravity and acceleration | 11/12/2011 |
| Q: my daughter is in eighth grade and dosent understand this subject. can you tell me an easier way to ... A: Gravity is 32.2 ft/s² where ft is feet and s is seconds, and is used as the variable a. This means ... | |
| business math question | 11/11/2011 |
| Q: David wants to buy a house. He doesn't know how much he should borrow. The bank will do a 30 yr at ... A: If the principal and interest is $985 per month, the value can be calculated. It is known that the ... | |
| college algebra | 11/11/2011 |
| Q: Keiko's penny bank is 1/2 full. After she removes 80 pennies, it is 1/3 full. How many pennies can ... A: If it is 1/2 full and she removes pennies until it is 1/3 full, that means she removed 1/6 of the ... | |
| mathematics | 11/6/2011 |
| Q: a company manufactures two products x and y by means of two processes a and b. the maximum capacity ... A: This gives rise to the constraints: 3x + y <= 1750 2x + 4y <= 4000 x >= 0, y >= 0. To find the ... | |
| Math Problem | 11/6/2011 |
| Q: Please solve this! I'm desperate! (If possible before the 8th of November 2011) Ok, here it is... ... A: The 1st man lays 500 bricks an hour to lay 1000 bricks in two hours. The 2nd man lay 300 1/3 bricks ... | |
| e, ln, and logs | 11/1/2011 |
| Q: If an object is put in an environment at a fixed temperature, A (the "ambient temperature"), then ... A: At t=0, the value of the function is A, so A = 160. As t goes on forever, the temperature will drop ... | |
| Business Math | 10/27/2011 |
| Q: Please help me with this problem as I am stumped as to how to solve it. Target sells boxes of ... A: If the bought 5 times as many boxes of vertical blinds as mini blinds, then for each mini blind, ... | |
| inequalities | 10/26/2011 |
| Q: A person has two choices for his salary. Plan A. A salary of $900 per month plus a commission of ... A: Plan A has the equation 900 + 0.1x. Plan B has the equation 1,200 for x less than 8000 and ... | |
| Word problem | 10/24/2011 |
| Q: How many grams of pure nickel must be added to 4200 grams of Alloy, 70% pure to make an alloy which ... A: First I will show the more complicated way, which would be used in general: Since it is 70% pure, ... | |
| Ratios | 10/19/2011 |
| Q: Can you think of a ratio that has units that have not canceled out? Do not use a rate as an example, ... A: I'm not sure what is being looked for, but perhaps if we thin of this classroom that has 20 students ... | |
| Math | 10/18/2011 |
| Q: Construct a quadratic equation with x= 3/7 and x= 4/3 as solution. A: The way to do this is to note that the equation x - 3/7 = 0 has the solution x = 3/7 and the ... | |
| Math | 10/18/2011 |
| Q: The base of the triangle in the figure is 4cm longer then the height. Finf the base if the area of ... A: The height of a triangle is x. The base is x+4. The area is base*height/2 = x(x+4)/2 = 30. ... | |
| Graph | 10/13/2011 |
| Q: I was trying to understand the following portion of an article, which stated: A) "... the ... A: I'm not sure what the probability in A is, but it has a peak of 0.37 the happens 2 days prior to ... | |
| algebra | 10/9/2011 |
| Q: I need help with this problem: A student is taking an exam with 40 questions on it. To pass the exam ... A: If she answer 40% of the first 15 questions, 15*40% = 15*0.40 = 6. From this, it can be seen she ... | |
| algebra | 10/8/2011 |
| Q: Tina mixes pretzels that sell for $2.00 a pound with cereal that sells for $3.00 a pound. She wants ... A: I will let you construct the graph. If she wants to buy 8 pounds at $2.50 a pound, that amount to ... | |
| Math Word Problem | 10/8/2011 |
| Q: I need help with a math problem.... Five divided by the sum of a number and 7, minus the quotient ... A: I assume that is 65n² + 75n = 0, correct? If this is so, n can be factored out on the left side ... | |
| Spacing Between Steps | 10/7/2011 |
| Q: How is the spacing determined for concrete steps or slabs if the distance is 12 feet long, and the ... A: If the slabs are 2' square, and there is 12', this means there is room for 6 steps. If there is ... | |
| math | 10/6/2011 |
| Q: Wanda loves tennis. She went to a shop and paid $32 for 4 tennis balls and 2 tennis rackets. 2 ... A: Let x be the price of 2 tennis balls, which is the same as the price of 3 rackets. This makes the ... | |
| Math Word Problem | 10/6/2011 |
| Q: I need help with a math problem.... Five divided by the sum of a number and 7, minus the quotient ... A: Translating, "Five divided by the sum of a number and 7, minus the quotient of 3 and the difference ... | |
| Maths (Pls assist Sir) | 10/3/2011 |
| Q: 1) ½ of Cyrus stamps equals to 6/7 of Richard’s stamps. The total number of stamps Cyrus & Richard ... A: 1) Let X be the number of Richard's stamps. This makes half of Cyrus's stamps be 6X/7, so the full ... | |
| Simple Interest Calculation | 9/28/2011 |
| Q: I read in a business mathematics book that the following calculation for determining simple interest ... A: GCD is short for Greatest Common Divisor. The GCD method refers to finding the greatest common ... | |
| Simple Interest Calculation | 9/28/2011 |
| Q: I read in a business mathematics book that the following calculation for determining simple interest ... A: The greatest-common-divisor (GCD) method finds the biggest number that divides two numbers evenly. ... | |
| math | 9/24/2011 |
| Q: If water is flowing from a faucet into an empty barrel at 4.5 gal per minute. After 4 minutes a ... A: No, the tub will never fill, since it is draining at a faster rate than it is filling. It is ... | |
| I think the answer is wrong | 9/21/2011 |
| Q: I was presented with the following problem: "Miss Green is the headmistress of a small school, ... A: If we have X + x = 281 and X - x = 11, then the simplest way to eliminate one of the variables is to ... | |
| age problem | 9/20/2011 |
| Q: aruna is 2 years younger than mukesh after 4 years mukesh will be twice the age of aruna 6 years ago ... A: Let mukesh be x years old. If aruna is 2 years younger, she is x-2 years old. In 4 years, mukesh ... | |
| I think the answer is wrong | 9/19/2011 |
| Q: I was presented with the following problem: "Miss Green is the headmistress of a small school, ... A: Answer incorrect ---------------------------------- Yes, if there are 12 pennies to a shilling and ... | |
| Verbal Problems | 9/17/2011 |
| Q: A bag containing a mixture of 6 mangoes and 12 guavas sold for P234. A smaller bag containing 2 ... A: If the price were the same, it would be P234 for 18 pieces of fruit, and that would be P13/piece. It ... | |
| Millions to Trillions | 9/12/2011 |
| Q: How many million dollars is 0.23 trillion dollars, and how many trillion dollars is 0.23 million ... A: It is known that 1x10^6 = One million = 1,000,000, 1x10^9 = One billion = 1,000,000,000, and ... | |
| Propositional Calculus | 9/11/2011 |
| Q: Good morning, Mr. Wilson : I apologize in advance for the length of this question. The question ... A: (4) Either John can vote or John is not over 21. They don't give an age you have to be to vote, so, ... | |
| trigonometry | 9/10/2011 |
| Q: The sum of two numbers is 24.Find the two numbers if their product is to be a maximum. A: It is known that a+b = 24, so b = 24-a. Thus, we want to maximize a(24-a). To do so, we want a = ... | |
| chemistry word problem | 9/6/2011 |
| Q: If a "square" ship 350' x 150' sits 16' deep in the salt water (d=1.06 g/m), what is the mass of the ... A: The volume in the water is 350 x 150 x 16 = 350 x 2400 = 840,000 ft^3. The density given is in ... | |
| Algebra Word Problem | 9/5/2011 |
| Q: The perimeter of a rectangle is 68 cm. The length is 6 cm more than the width. What are the ... A: Let W = width of the rectangle. With that, L = W + 6. It is known that the perimeter is 2W + 2L. ... | |
| algebra 2 | 9/1/2011 |
| Q: The degree measure of the angles of a pentagon are consecutive even integers. Find the measure of ... A: If this is a regular pentagon with equal sides, all of the angles are equal. Since the sum of the ... | |
| Math problem | 7/27/2011 |
| Q: A marble of diameter 2 is dropped into a conical cup with a height of 4 and a radius of 3. When it ... A: Using the attached picture, the answer will be d + e - r. Since d/c = 3/4 and d²+c²=r², putting in d ... | |
| Chemistry | 7/26/2011 |
| Q: If a dozen eggs weigh .75kg and the net weight is 6.0kg how many eggs are there? A: The weigth is 0.75 kg / dozen eggs. From this, it is known that 0.75x = 6 has a solution x as the ... | |
| maths | 7/6/2011 |
| Q: (i)A litre of orange fruit drink contains 22% orange juice. How many millilitres of orange juice ... A: If the litre is 22% orange, it is 100% - 22% other stuff, and that is 78%. Since 1% is a ... | |
| Word Problems | 6/26/2011 |
| Q: I have difficulities in solving the following two questions. 1) Painter A and B take 10 days to ... A: 1) To solve, see how many houses could be done in 60 days for each pair. Thus, A and B could get 6 ... | |
| quadraic equations | 6/14/2011 |
| Q: Find the length and width --- the width of a photo is 5cm less then the length. the area is 24cm^2 A: Let the length be L and the width is then L - 5. The area is the length times the width, which is ... | |
| college word problems | 6/4/2011 |
| Q: ronnie's apartment number plus the square of harry's apartment number equal 2240, which happens to ... A: R = Ronnie's apartment, H = Harry's apartment, R + H^2 = 2240. The next equation is H + R^2 = 1008. ... | |
| college word problems | 6/4/2011 |
| Q: recently javier recieved a letter from his banh concerning his checking account. under his current ... A: The current price is 15c per check and $1.60 charge, so the price is 1.6 + 0.15n, where n is the ... | |
| word problems | 6/2/2011 |
| Q: find the next four terms in each sequence A. 243,81,27,9,3,-,-,-,- B.4,9,8,13,12,-,-,-,- C. ... A: I'm not sure this was soon enough, but I only review my questions once a day. A is 1/3 of the last ... | |
| college word problems | 6/1/2011 |
| Q: UNABLE TO SELL A HAT FOR $20, A HABERDASHER LOWERED THE PRICE TO $8. IT STILL DID NOT SELL, SO HE ... A: If the hat does not sell, the price is cut to 2/5 of the old price. That is, it starts at $8, and ... | |
| college word problems | 6/1/2011 |
| Q: PASCAL'S TRIANGLE SHOWS UP IN THE SOLUTIONS OF MANY PROBLEMS. CONSIDER HOW PASCAL'S TRIANGLE MIGHT ... A: Row 1 is 1 1, and that means 1 head and 1 tail. Row 2 is 1 2 1, and that means 1 way to get ... | |
| college word problems | 5/31/2011 |
| Q: Dusty Rhodes is planning to buy a new mountain bike. The different avaible options are as follows, ... A: Good morning! This might be to late if you need the answer tonight, since it is tomorrow, but if ... | |
| college word problems | 5/28/2011 |
| Q: we have a garden that measures 17 feet by 20 feet. we want to pour concrete for a 3-foot-wide ... A: For a picture, get the garden in your thoughts as a 20' by 17' area with a garden in the middle. ... | |
| college word problems | 5/28/2011 |
| Q: Yolanda scored 10 points in a basketball game. she could have scored with one-point free throws, ... A: If she scored 10 points, that is a maximum of 3 3pt shots, with 1 one-point free throw. This makes a ... | |
| General math definition. | 5/23/2011 |
| Q: Did a problem and the answer was y = sq.root of 12. I remember the square root definition being "A ... A: Mathematices has several classifications of numbers. They are integers (negative and positive), ... | |
| General math definition. | 5/21/2011 |
| Q: Did a problem and the answer was y = sq.root of 12. I remember the square root definition being "A ... A: The squareroots of 9, 16, and 625, are 3, 4, and 25, for 3*3 = 9, 4*4 = 16, and 25*25 = 625. By ... | |
| Help!! | 5/18/2011 |
| Q: A baby weighed 3.2 kg at birth.She gained 0.17 per week.How old was she when she weighed 5.75? ... A: We have the weight as 3.2kg + (0.17N)kg. Her present weight is 5.75kg. Since they are the same, 3.2 ... | |
| Help!!! | 5/18/2011 |
| Q: Arnold had $1.70 in dimes and quarters.He had 3 more dimes than quarters.How many of each coin did ... A: One approach is by trial and error. This can be done since we know X is a small integer. If he had ... | |
| trigonometry word problems | 5/17/2011 |
| Q: A 15m pole is leaning against a wall. The base of the pole is 10m from the wall. Find the angle ... A: The pole is at an angle to the ground and the wall. The ground and the wall are perpendicular. This ... | |
| word problem | 5/11/2011 |
| Q: a swimming pool has 14 lifeguards. If there are the same number of lifeguards are on each side where ... A: If there is an equal number of units between each of them, make the pool 3 and a half units on each ... | |
| inverse proportion? | 5/4/2011 |
| Q: how high in air am when a forty foot semi looks an inch long? i travel a lot and was just wondering. ... A: Now 40' is 480", so it's size have been reduced to 1/480 of normal size. The basic equation is ... | |
| Functions Grade 11 | 5/3/2011 |
| Q: In 1878, moose were first introduced in Newfoundland with a single bull and a single cow. Today, ... A: The last values given make no sense in that in 1746 they weren't even there yet and the 150000 is ... | |
| Inverse Trig Question | 5/1/2011 |
| Q: A 5% grade, for example, means that the altitude changes by 5 feet for each 100 feet of horizontal ... A: A. The angle is 10°, and the percentage would be 100*rise/run. It is known that rise/run = tan(10°), ... | |
| MAth problem | 4/26/2011 |
| Q: my question is How many pieces were originally in the bowl at the beginning of the party? How many ... A: Assume tht there are n pieces of candy in the bowl, some finite, positive, integer value. Kevin ... | |
| minimum surface area of a can | 4/23/2011 |
| Q: 1. Assuming a fixed volume can of 785 cubic cm, set up the equation of surface area A verses radius ... A: The volume of a can is V = pi*r^2*h where r is the radius. The surface area is A = 2*pi*r*h for the ... | |
| math | 4/20/2011 |
| Q: I want to buy an suv that costs $37,500. It depreciates 15% per year. What is the value of the SUV ... A: This means the value left after each year is 1 - 15% = 85% of the value last year. If we take ... | |
| Matrice Train load Word Problem | 4/19/2011 |
| Q: An oil refinery wants to lease a fleet of 24 railroad tank cars wiht a combined carrying capacity of ... A: I will assume that they want to lease as few railroad cars as possible. Now 24 x 2 = 48, so 24 x 20 ... | |
| Sir pls assist...Thanks a million. | 4/18/2011 |
| Q: 1)Mrs Kwan recieved $4 for every box of chocolate sold. In addition, she would receive an extra $15 ... A: 1) if she receive $15 for every 12 boxes sold and each box was $4, the price of 12 boxes could be ... | |
| pythagorean theorem | 4/14/2011 |
| Q: Joe decided to take his rowboat across a river. He can row at a comfortable pace of 3 mph and the ... A: If it take 2½ hours and he rows at 3 mph, then he rowed for 7½ miles. This is the hypotenuse on a ... | |
| grade 11 functions | 4/12/2011 |
| Q: the parobola with the equation y=xsquared is reflected in the x-axis, vertically streached by a ... A: The graph is y = x². To reflect it about the x-axis means to take a negative, so now we have y = - ... | |
| Still Water.... | 4/11/2011 |
| Q: The Boise river flows at a rate of 4mph. In order for a couple to row a canoe 10 miles upriver and ... A: It is known that if t is time, d is distance, and r is rate, the equation is t = d/r. It is also ... | |
| Stuck on simple probability question | 4/8/2011 |
| Q: I've been stuck for the last couple of days on this supposedly very simple probably questions:30 ... A: There are 30 widgets that have been made, and 5 of them are faulty. This means that 30 - 5 = 25 are ... | |
| college algebra | 4/7/2011 |
| Q: Carl wants to construct three rectangular dog-training arenas side-by-side using a total of 450 feet ... A: To construct three areas of fencing all the same size side by side would require only 4 sides, since ... | |
| Word Problem | 4/6/2011 |
| Q: Four times a number, increased by three is the same as twice the number, increased by nine. Find the ... A: Four times a number, increased by three is ... use x as this number, so four times is 4x, and 4x ... | |
| math algebra 1 | 4/5/2011 |
| Q: Mr. Keo Have had $10,400 to invest. He invested part of the moneyat 6%, and the rest at 7%. The ... A: If we have x at 6% and $10,400 at 7%, that gives 0.06x + 0.07(10,400-x) = $686. Multiplying that out ... | |
| ratios | 4/2/2011 |
| Q: a club;s subscription fees for men and women are in the ratio 4:3. Two men and five women pay a ... A: The ratio means if the women pay 3x, the same number of men pay 4x. We have two mean and five women, ... | |
| rate | 4/1/2011 |
| Q: find an approximate value for the rate at which the moon orbits the earth. Assume that the moon's ... A: It is 383200 km from the center to the Moon, accounting for earth radius of 1200 kilometers. The ... | |
| algebra | 3/31/2011 |
| Q: nathan has two brothers connor and josh. if we add 2 to conners age it s exactly 1%2 the age of ... A: Is the question suppose to be, "Nathan has two brothers Connor and Josh. If we add 2 to Conners ... | |
| math | 3/28/2011 |
| Q: a landscaper wants to plan a new rectangular rose garden with dimensions 20 by 30 meters. She plans ... A: Suppose the width of the walkway is x. The walkway would be 20 m long on two sides and 30 m long on ... | |
| Force exerted on pool walls | 3/24/2011 |
| Q: A free-form pool has a constant depth of 1.5 meters. The pressure at the bottom of the pool is 14.7 ... A: The pressure at the base is 14.7 and the pressure at the top is 0, so an equation for pressure, ... | |
| Word Problems | 3/23/2011 |
| Q: The marketing department at Texas Instruments has found that when certain calculators are sold at a ... A: a) Take price times number sold, which is p(-150p^2 + 21000p). This changes to -150p^3 + 21000p^2. ... | |
| Inequalities | 3/23/2011 |
| Q: A car salesman has two choices fro his salary. Plan A A salary of $100 per week plus a commission ... A: Let the gross sales be X, so the two choices are A: $100 + 0.03x and B: $75 + 0.05X. To find out ... | |
| Word Problems | 3/20/2011 |
| Q: How high will a basebvall that is thrown up into the air at 48 feet per second go if it starts it ... A: The basic equation to use is h(t) = d + vt - gt^2/2 where on earth, g = -32'/s^2. The variables are ... | |
| Math Question | 3/20/2011 |
| Q: Have a problem with getting the equation for the following: Between noon and 2PM snow is falling at ... A: The only error is that is should be 20 = 2x - 4x(1-0.25). To describe how I got there, ... Between ... | |
| minimize volume of a cylinder? | 3/15/2011 |
| Q: I'm not sure if I'm doing it right. I know that v=pi*r^2*h, distance of a circle is pi*r^2, and the ... A: Since v = 9π = πr²h, so r²h = 9. This will say that h = 9/r². The surface area is given ... | |
| algebra | 3/15/2011 |
| Q: the frame on a picture is 28 cm by 32cm outside and is of uniform width. What i the width of the ... A: It is known that 28 cm x 32 cm = 896 cm^2. If 192 cm^2 shows, that means that 704 cm^2 doesn't. Of ... | |
| Statistics | 3/14/2011 |
| Q: I have a problem, and I just need to know how to work it out, so I can do the others. It states ... A: The distribution I would use is the binomial distribution.. I would define C(a,b) = a!/(b!(a-b)!), ... | |
| Word problems | 3/14/2011 |
| Q: pls assist on these word problems. Thanks in advance. 1)Roy was given a rope measuring 14.04m. He ... A: 1) The side on a square with an area of 169cm² would be 13cm. That would be 0.13m. Now 14.04m - ... | |
| Physical Science | 3/11/2011 |
| Q: Well I was just wonderin if ya'll knew how to use conversions. My mama is trying to teach them to me ... A: Well, there are 4 quarts in a gallon, 12 inches in a foot, 3 feet in a yard, 2.54 cm in an inch, for ... | |
| word problem | 3/9/2011 |
| Q: A person takes a loan of Rs44000 at an interest of Rs3600 per year.His initial income is Rs40000 ... A: What I read in this problem is 44,000 loan with 3,600 interest per year 40,000 initial income with a ... | |
| logarithm | 3/6/2011 |
| Q: I'm stuck with this logarithm, can you write how do I solve it? Please and thank you! A: The log[8](4*cuberoot(32)*(1/25^(log[5](4))), where log[a](b) = log base a of b? First, ... | |
| Word problems | 2/28/2011 |
| Q: My question says: Find 2 consecutive integers such that the sum of the twice the first and three ... A: Let n be the first integer. Since they are consecutive, the 2nd is n+1. It then says that 2n + ... | |
| chem 094 | 2/22/2011 |
| Q: A 50mL sample of helium gas has a pressure of 0.75 atm. What will be the new volume if the pressure ... A: It is known in chemistry that PV = nRT where P is for pressure, V is for volume, n is for the number ... | |
| linear equations and inequalities | 2/21/2011 |
| Q: how many gallons of 5% acid solutions must be mixed with 5 gallons of a 10% solution to obtain a 7% ... A: The total amount of solution is (0.5 + 0.05x). The total solution is (5+x). We need to have 7%, so ... | |
| math | 2/20/2011 |
| Q: A painter has a 30' ladder. He has a cube 6' x 6' x 6' which he places firmly into the right angle ... A: I used difference equations to find the answer. The ^ is like a power; i.e., 2^3 = 2*2*2 = 8; 8^4 = ... | |
| Quant. Methods | 2/19/2011 |
| Q: I am in a QM class with a teacher that doesn't explain it enough for me. I need a tutor for the ... A: In problems like this, they are called Linear Programming and are found in Operations Research. ... | |
| math | 2/18/2011 |
| Q: A painter has a 30' ladder. He has a cube 6' x 6' x 6' which he places firmly into the right angle ... A: If it is x feet from the floor and y feet up the wall, then two right triangles are involved. One is ... | |
| need to set up algebraically using a linear equation | 2/15/2011 |
| Q: jeff buys 200 shares of stock in a high tech firm. he buys some shares at $8.125 per share, and the ... A: Let x be the shares at $8.125. This makes 200 - x the shares at $9.375 Solve the equation 65x/8 + ... | |
| Algebra | 2/15/2011 |
| Q: Jeff left the airport and traveled toward the restaurant. Karla left 1.2 hours later traveling 35 ... A: If Karla left 1.2 hours later and caught up with him in another 1.2 hours, that means she was going ... | |
| Word problem | 2/13/2011 |
| Q: The sum of two numbers is 7, twice their product gives 20. Find the numbers A: The two numbers are x and y. They tell us that x+y = 7 and 2xy = 20. From the 1st equation, we know ... | |
| Calculus | 2/12/2011 |
| Q: A spherical balloon is inflated with gas at the rate of 800 cubic centimeters per minute. How fast ... A: The volum of this balloon would be V(r) = 4*pi*(r^3)/3. The rate of change would be the derivative, ... | |
| Bath water | 2/8/2011 |
| Q: A bath holds 172 liters of water. The tap empties the tub at 4.3 l/min faster than it fills the tub. ... A: Let x be how fast it fills. This means that is empties at x+4.3. The time to fill is 172/x and the ... | |
| Interest | 2/7/2011 |
| Q: I am having difficulty determining the interest for the following: I assume the year consists of 360 ... A: A month is assumed to be 30 days. Thus, 5 months is 5*30 = 150 days. If we add on 6 days, we get 150 ... | |
| Vacation Trip math problem | 2/3/2011 |
| Q: You and a friend share the driving on a 280 mile trip. Your average speed is 58 miles per hour. Your ... A: Your time is x and your friend's time is x-1. Since distance = rate * time, it is known that you ... | |
| Linear Algebra Matrix Question | 1/26/2011 |
| Q: Can you let me know if I found the right liner equations out of this question, I get the feeling I ... A: They do fit into a matrix, but it appears to need another row. However, the solution must be ... | |
| Dividing a large number into... | 1/20/2011 |
| Q: I'd like to divide a large number into smaller numbers using a couple different, but merged, number ... A: The answer could be varied to suit the needs of the project, but I'll give a rough approximation ... | |
| problem regarding law of cosines | 1/20/2011 |
| Q: i have 3 problems sir, i really need it right now for the deadline of this homework is tomorrow. ... A: The law of cosines is a^2 + b^2 - 2ab*cosC = c^2. 1. Let a = 245, b = 270, and C = 110º. This ... | |
| math | 1/19/2011 |
| Q: louise travels 10 miles in about 15 minutes kareem travels 23 miles in about 30 minutes. who has ... A: If Louise travels 10 miles in about 15 minutes. Since 15 minutes times 3 is 60 minutes, and that's ... | |
| college Algebra | 1/18/2011 |
| Q: I need to figure out this problem: A truck can be rented from Basic Rentals for $50 per day. In ... A: One equationj is 50 + 0.2x and the other is 20 + 0.5x. This is the same as 50 + x/5 and 20 + x/2. ... | |
| PHYSICS | 1/16/2011 |
| Q: A student playing with a radioc race car off a 6th floor balcony. Accidental turn sends the car ... A: If you have a race car on the 6th floor and it goes speeding of the edge, the vertical distance is ... | |
| math | 1/16/2011 |
| Q: Ho sells ice cream cones at the county fair. she has to rent the equipment for $48 and spend $0.53 ... A: The $48 is constant, so the equation will have a +48 at the end. The cost is 53c a cone, so there is ... | |
| math | 1/15/2011 |
| Q: Consider a circle (C) of center O. A and B two points on this circle. M is the midpoint of segment ... A: Call the bisection point M. Choose some point D on the perpendicular line. Since M is in the middle ... | |
| math | 1/15/2011 |
| Q: The sum of two numbers is 5,and their product is 6.find these two numbers. A: Let the two numbers be x and y. It is known that x + y = 5 and xy = 6, so solve the 1st equation for ... | |
| Math Probability | 1/13/2011 |
| Q: If four people vote yes or no, how many possible outcomes are there? List the outcomes. Of the ... A: If there are 4 people and they only have 2 choices each, that would make for 2^4 possible outcomes, ... | |
| algebra | 1/12/2011 |
| Q: Together, a baseball and a football weigh 1.25 pounds, the baseball and soccer ball weigh 1.35 ... A: Let X be the baseball, Y be the football, and Z be the soccer ball. The equations would be [1] X + Y ... | |
| linear, inequalities, graphs | 1/12/2011 |
| Q: Tracy is selling purses and shoes to make some money. The purses cost $15.00 and the shoes cost ... A: Let X be the number of purses and Y be the number of shoes. What is needed is to have 15X + 12Y <= ... | |
| Integration | 1/11/2011 |
| Q: Can you show me how do I exactly integrate (1/5)^(x/2)? Will you be possible to show me in more ... A: Since taking the derivative gives an extra ln(1/5) for taking the derivative of 1/5 to a power and a ... | |
| inequalities | 1/7/2011 |
| Q: The speed limit on highways in Florida is 70 miles per hour. Write and solve an inequality to find ... A: Since the speed limit is 70 miles/hour, and the distance is 105 miles, look at the factors to ... | |
| Math Word Problem | 1/3/2011 |
| Q: Jorge is 1 year older than julia. The product of their ages is 240. How old is each? A: Call Jorge x years old. This means Julia is x-1 years old, since Jorge is 1 year older. The ... | |
| Square of the second number (Consecutive Even Integer) | 1/3/2011 |
| Q: Find three consecutive even integers such that twice the product of the first and last numbers is 28 ... A: Well, that's almost it. It says, "twice the product". This means it is really 2N(N + 4) = (N + 2)² + ... | |
| college algebra work problems | 12/29/2010 |
| Q: Two planes leave Los Angeles at the same time. One heads south to San Diego, while the other heads ... A: Since one plane travels 50 mph slower and they have been in the air for half an hour, that plane has ... | |
| Problem | 12/22/2010 |
| Q: Cost of 222 bags is rupee rs.4408.80 fing the cost of 4 bags? A: Looking at an estimate of the answer, each bag is roughly 4400/220, and that is rs. 20. This means ... | |
| algebra | 12/20/2010 |
| Q: five times a number , subtracted from twelve, is triple the number. Find the number A: The number is x. To get five times that number, it's 5x. To subtract it from 12, that's 12 - 5x. To ... | |
| College Algebra Word Problem | 12/20/2010 |
| Q: The members of a flying club plan to share equally the cost of a $200,000 airplane. The members ... A: Let x be the amount for n members. This means that 200,000/n = x and 200,000/(n+5) = x - 2,000. ... | |
| word problem | 12/18/2010 |
| Q: Will you kindly answer my question The area of a rectangle is 72 square meters. The length is 3 more ... A: For a rectangle to have a 72m² area, this mean with lenght L and width W, LW = 72. It is also given ... | |
| Calculus | 12/15/2010 |
| Q: Can you help me to solve the following question; The amount of light transmitted I, in terms of the ... A: a) Find dI/dΘ, and that involves finding the derivative of cos²(Θ). This is a case of the ... | |
| Math | 12/15/2010 |
| Q: Separate $74 into two parts so that one amount is $7 less than twice the other amount A: This involves two equations. The first is that $74 dollars is divided into two parts. Call one part ... | |
| word problem | 12/11/2010 |
| Q: the age of a father is 6 times the age of his son now. after 4 years the age of the father will be 4 ... A: Let's take the boys age right now as x. That means the father's age right now is 6x. After 4 years ... | |
| Surface Area | 12/11/2010 |
| Q: 1. A cylinder tank, 3 m in diameter, contains water to a depth of 1.5 m. Fnd the total area of its ... A: 1. For the area of the base, it is the same as the area of a circle with a radius r and is pi*r^2. ... | |
| System of inequalities | 12/7/2010 |
| Q: Here is the question I am having difficulty solving. A company makes storage buildings in two sizes. ... A: The two inequalities are for money and time. Lets say money is S is small building and L is large ... | |
| Word Problem | 11/30/2010 |
| Q: ny name is Ryan. I am actually at work right now and am wasting a lot of valuable time trying to ... A: The cylinders are standing up (putting the circle on the bottom). Since they are 14" wide, the ... | |
| property taxes | 11/30/2010 |
| Q: A school district is located in a city that has property with an assessed value of $105,600,000. The ... A: Total property value: $105,600,000 Budget: $3,800,000 Received from state and federal taxes: ... | |
| calculus problem | 11/20/2010 |
| Q: a farmer with 12,000 meters of fencing wants to enclose a rectangular field and then divide it into ... A: If x is the long side, then 12,000 - 2x is the sum of the lengths of the two ends and the cross ... | |
| question | 11/19/2010 |
| Q: You want to buy a car for $30,000. Two lenders offer you loans. First loan company offers you: ... A: I answered this question in an Excel Spreadsheet. The columns line up at this end. The formula I ... | |
| Algebra | 11/19/2010 |
| Q: A snowball is thrown into the air at 15 meters per second from a 45 meter ledge. When will the ... A: Actually, I was wrong - the equation is -gt^2/2 + vt + d. That's what -5 is, though, for metric ... | |
| Algebra | 11/18/2010 |
| Q: A snowball is thrown into the air at 15 meters per second from a 45 meter ledge. When will the ... A: In metric, gravity is -9.8m/s^2. The equation for height is at^2 + vt + h where a is gravity, v is ... | |
| algebraic word problem | 11/17/2010 |
| Q: There are four times as many nickels as dimes in a coin bank. The coins have a total value of 600 ... A: Let x be the number of dimes. This given, 4x is the number of nickels. Since nickels are 5c and ... | |
| singapore math | 11/17/2010 |
| Q: Lily and Mackenzie collected some stamps. If Lily gave 4 stamps to Mackenzie, Mackenzie would have ... A: Lily is L and Mackenzie is M. L gives 4 stampe to M, M has twice as many mean 2(L-4) = M+4. M gives ... | |
| algebra two applications of linear systems | 11/16/2010 |
| Q: Several students decide to start a T-shirt company. After initial expenses of $280, they purchase ... A: Since they buy the T-shirts at $3.99 and sell them at $10.99, the profit is the difference between ... | |
| MATH PERMUTATIONS QUESTION | 11/15/2010 |
| Q: In the nine letter word EDUCATION (in which there are five vowels and four consonants), how many ... A: If there are 2 letters, there are 2 ways to pick the 1st letter and only 1 way to pick the last, so ... | |
| word problem | 11/13/2010 |
| Q: If the worlds circumference is 24,859.82 ft. Long and a jet flys at the speed of 1865 mph. How ... A: From what I remember, the circumferene is around 25,000 miles, so that ft. on circumference should ... | |
| college algebra | 11/9/2010 |
| Q: 0.09x+0.11(x+125)=68.75 A: For 0.09x+0.11(x+125)=68.75, the 0.11(x+125) can be muliplied out. This gives 0.99 + 0.11x + 13.75 = ... | |
| Linear programming | 11/7/2010 |
| Q: The Halloween express is making prepackaged bags of candy for customers to give out to trick- or- ... A: Using linear programming, the solution can be approximated. To get the exact soluetion, try integer ... | |
| algebra | 11/7/2010 |
| Q: To conduct a scientific experiment, students need to mix 900 ml of 3% acid solution. They have a 1% ... A: The two solutioins are A and B. A is the 1% solution and B is the 10% solution. It is known that ... | |
| algebra | 11/7/2010 |
| Q: One alloy of copper and silver is 25% silver and another is 37.5% silver. How much of each alloy ... A: To get 30% silver in 200 pounds, that means we need 60 pounds of silver. The first alloy is X and ... | |
| Rates of Change problem | 10/18/2010 |
| Q: I need help on this problem please! You are on an extended road trip. You drove 85 miles per hour ... A: (a) To find the average speed, it is distance / time. To find the distance, note the for the first ... | |
| trig word problem | 10/18/2010 |
| Q: From an observation tower that overlooks a runway,the angles of depression of point A,on one side of ... A: Actually, there is a mistake in the old problem in that I gave the tan() on the two angles ... | |
| Word Problem please help | 10/18/2010 |
| Q: You have $33 to spend on 24 Mylar Balloons. Birthday balloons cost $1.50 each, congratulations ... A: Let x = number of Mylar ballons, y = number of birthday baloons, and z = number of congratulation ... | |
| Integrated Math word problems | 10/17/2010 |
| Q: Miriam is 10 years older then Ricardo. Two years ago Miriam was 3 times older than Ricardo is now. ... A: Miriam is age x. Ricardo is x-10. The age of Miriam 2 years ago was x-2. The problem then states 2 ... | |
| trig word problem | 10/17/2010 |
| Q: From an observation tower that overlooks a runway,the angles of depression of point A,on one side of ... A: Let x be the distance from the tower to the near side of the runway. Let h be the height of the ... | |
| Length Of Rectangle | 10/16/2010 |
| Q: The length of a rectangular picture is 5 cm more than the width. The area is 84 cm^2. Find the ... A: The width is x. This means the length is 5+x. The area is x(5+x) = 84. This means that x^2 + 5x - 84 ... | |
| Elemetary statistics | 10/16/2010 |
| Q: The time it takes to assemble a car body in a factory is normally distributed with a mean = 25 ... A: I would look at the standard normal distribution. The value of 30 would be the mean plus one ... | |
| maths | 10/16/2010 |
| Q: The cost price of 20 hats is equal to the selling price of 25 hats What is the %profit/loss made by ... A: Let x be the cost price of 20 hats. This means each has cost x/20. This x is the same price of ... | |
| Word Problem | 10/15/2010 |
| Q: Bill makes three times as much selling swords as he does selling rotten fish. If he made $15 more on ... A: Let x = amount made on swords and y = amount made on rotten fish. At the start, the x = 3y. If we ... | |
| trigonometry | 10/11/2010 |
| Q: A ladder 34.5ft. long is leaning againts the embankment inclined 62 angle to the horizontal. If the ... A: The ladder is 34.5', and that is the hypotenuse of the triangle. The incline it leans against is at ... | |
| Proportions | 10/10/2010 |
| Q: If a man can run from his house to the drug store in 12 minutes at 15 miles per hour, how many ... A: If 3 people take 7 hours to rake the yard, then in that 7 hours each person has raked 1/3 of the ... | |
| Proportions | 10/9/2010 |
| Q: If a man can run from his house to the drug store in 12 minutes at 15 miles per hour, how many ... A: If a man can run from his house to the drug store in 12 minutes at 15 miles per hour, how many ... | |
| Math | 10/8/2010 |
| Q: The greater of two numbers is one less than 8 times the smaller. their sum is 98. Find the numbers A: The smaller number is n. It says that if we take this times 8 and subtract 1, we get the larger ... | |
| maths | 10/7/2010 |
| Q: Six men can plough a field in 5 days. How many days would it take 4 men? Can i have some help on ... A: The thing to work with is total time that was spent. With 6 men taking 5 days, that is an ... | |
| Word problems | 10/7/2010 |
| Q: A ream of paper contains 500 sheets of paper. Norm has 373 sheets of paper left from a ream. Express ... A: The fraction Norm has is the number of sheets he has over the total number of sheets. He has 373 ... | |
| help please :( | 10/6/2010 |
| Q: An efficiency consultant determines that when new workers are hired to wait tables at an upscale ... A: To find out the lim(x->∞)((√(5.3x^2+ 50x+14)/(0.1x+0.8))), divide the top and bottom by ... | |
| Interpreting slope as a rate of change | 10/6/2010 |
| Q: A car goes from 60mph to 0 mph in 120 feet after applying the brakes. a) Find and interpret the ... A: Let v(t) be velocity and d(t) be distance. At time 0, we know that v(0) = 60 and d(0) = 0. At some ... | |
| word problem | 10/6/2010 |
| Q: A three digit number grows by 9 if we exchange the second and third digits and grows by 90 if we ... A: Let the digits be ABC, so for 254, A=2, B=5, and C=4. The difference of changing B is nothing. The ... | |
| word problem | 10/2/2010 |
| Q: nathan has two brothers, conner and josh. if we add 2 to conner's age, it is exactly 1/2 the age of ... A: We are given that Josh is 12. One half of this is 6. Two less than this is 4. This means that Conner ... | |
| Algebra 3-4 | 10/2/2010 |
| Q: how can i solve (rad x + 3) + (rad 2- x) = 3 ? A: Square both sides of this equation. Note that on the left we have a = sqrt(x+3) and b = sqrt(2-x). ... | |
| word problem | 10/2/2010 |
| Q: 1.Mr. Adewumi agreed to work on his uncle's ranch 3 months and one summer for P350.00 and a used ... A: 1. If Mr. Adewumi only worked for 3 months and was scheduled for 3 months, then he would have ... | |
| algebra word problem | 10/1/2010 |
| Q: Kesha drove from Buffalo to Syracuse at an average rate of 48 miles per hour. On the return trip ... A: It is known that both trips have the same distance d. It is also known that the time at 48 mph it ... | |
| Geometry | 9/30/2010 |
| Q: I am having trouble with geometry class and I needed help with the following question in particular: ... A: The slope m of the line passing through (-2,-4) and (3,5) is given by (5 - -4)/(3 - -2). This is ... | |
| geometry | 9/23/2010 |
| Q: Label possible rectangles with a perimeter of 30 cm and sides whose lengths are whole numbers A: The size of a rectangle is length L x width W, and the perimeter is 2L + 2W. If the perimeter is ... | |
| Maximum and minimum word problems | 9/23/2010 |
| Q: A taxi service operates between two airports, transporting 300 passengers a day. The charge is ... A: The basic revenue is 300*8. If 20 passengers are lost for each dollar increase, call the increase ... | |
| 5th grade math | 9/22/2010 |
| Q: the initial fee for joining a health club is $ 40. after that, the cost is $ 12 a month. if haley ... A: Since there are 12 months in a year and the charge is $12 for each month, the cost is the basic fee ... | |
| Pre-AP Precalc homework | 9/22/2010 |
| Q: kiran drove from tortula to cactus a distance of 250mi. she increased her speed by 10 mi/h for the ... A: Her 1st speed was S, so the first trip took 250/S. Her 2nd speed was S+10, s the next part of the ... | |
| uniform motion problem | 9/21/2010 |
| Q: "A plane leaves an airport at 3pm. At 4pm another plane leaves the same airport traveling in the ... A: The 1st plane travels at speed x. The 2nd plane travles at seepd x+150. After 4 hours, the first ... | |
| math trick problem | 9/19/2010 |
| Q: a guy writes either 1, 2 or 3 on a card. he can only answer yes, no or I don't know. you have to ask ... A: A box contains 2 red marbles and 20 black marbles. The number on the card is the number to be ... | |
| Algebra 2 Scientific Notation word problem | 9/17/2010 |
| Q: A king cobra bite is fatal to a mouse if the mouse receives at least 0.00173 gram of venom per ... A: It take 0.00173 grams of venom per kilogrm. Since the mouses weight is 0.02 kilogram, the aswer ... | |
| Math | 9/17/2010 |
| Q: In a hockey arena, a seat at rink level costs three times as much as a seat in the upper level. If ... A: Let x be the cost of seats on the rink and y be the cost in the upper level. The two equaions to ... | |
| Chemistry | 9/16/2010 |
| Q: How long will it take in seconds for light to travel 2.07 x 10^11 m from Mars to Earth? A: The speed of light is 300,000 km/s, and that is 3x10^6. Take 2.07x10^11/3x10^6 and that gives how ... | |
| College Algebra | 9/16/2010 |
| Q: A kennel owner has 38 ft of fencing to be used to divide a rectangular lot into 2 equal pens. Find ... A: When a pen is AxB, the fencing used is 2A + 2B. There are two pens of this size that share a side ... | |
| Differential Related Rates | 9/15/2010 |
| Q: A baseball diamond is 90 feet on a side. A man runs from first base to second base at 25 feet per ... A: The pole is 20' high. The person is 5' high and walking away at 5'/sec. If the distance from the ... | |
| Finance Math | 9/15/2010 |
| Q: I just need need help with this problem, thank you so much. Huni puts 35% down on a $200000 home ... A: a) The amount financed if 35% is put down is the remaining 65%. Now 65% of $200,000 is 0.65(200,000) ... | |
| Differential Related Rates | 9/14/2010 |
| Q: A baseball diamond is 90 feet on a side. A man runs from first base to second base at 25 feet per ... A: Speed = 25ft/s from 1st to 2nd. Since he is 30 feet from 1st base, he is 60' from 2nd base. This ... | |
| rt=d word problems | 9/14/2010 |
| Q: nedra and latonya are 12miles apart hiking toward each other.how long will it take them to meet if ... A: If Nedra walks at 3 mph and Latonya walks 1 mph faster, Latonya is walking at 4 mph. This means the ... | |
| rt=d word problems | 9/14/2010 |
| Q: how long will it take a bus traveling at 60mph to overtake a car traveling at 40mph if the car had a ... A: The car has a 1.5 head start at 40 mph. This means the car has a 1.5*40 = 60 mile head start. Let ... | |
| chemistry word problem | 9/13/2010 |
| Q: A graduated cylinder id filled to the 40.0-mL mark with a mineral oil. The masses of the cylinder ... A: Hope you read this, for my answer was in error. I found out upon rereading that it could be done. ... | |
| math | 9/13/2010 |
| Q: On a255-mile trip,Gary Alessandrini traveled at an average speed of 70 mph, got a speeding ticket, ... A: The speeding ticket took half an hour, so travel time was 4 hours. At 70 mph he would have gone 280 ... | |
| Word Problem | 9/13/2010 |
| Q: How many gallons of 5% alcohol solution must be mixed with 90 gallons of 1% solution to obtain a 2% ... A: The amount of 5% alcohol is x. The amount of alcohol is 0.05x. The amount of 1% alcohol is 90. The ... | |
| word problem | 9/8/2010 |
| Q: How do I set up this problem to find the answer. A passenger train leaves a depot 1.5 hours after a ... A: The freight train is travelling at x mph. The total time for the freight train was 2.5 + 1.5 = 4 ... | |
| Accounting help | 9/8/2010 |
| Q: ANSWER: The term credits is used for the money you owe to someone else. The term debits is used for ... A: From the perspective of the buyer, credits are negative and debits are positive. From the ... | |
| Math Problem help | 9/6/2010 |
| Q: I just need help with this math problem thankyou I appreciate it! A circular water stain on your ... A: If was 4 inches across on Monday and 5.5 inches across on Tuesday, that is an increase of 1.5 units ... | |
| Math - Algebra | 9/4/2010 |
| Q: Hey Scott, I just stumbled across this question in my homework assignment and cant seem to nail it. ... A: Let x be the height. Claire knows that the width is 1+2x. The area is known to be height * width, ... | |
| Set theory-venn diagrams | 9/2/2010 |
| Q: There are 54 students in a class.30 of them take Maths,20 take Economics and 21 take Geography.13 ... A: The total number is N=54 30 in Math; 20 in Economics; 21 in Geography; 13 in Math and Economics; 12 ... | |
| math | 9/2/2010 |
| Q: which is greater the number that is 1000,000 less than 16,892,000,or the number that is 10,000,000 ... A: 1,000,000 less than 16,892,000 implies computing 16,892,000 -1,000,000 and that is doing the ... | |
| Word problem | 8/30/2010 |
| Q: Sir Kindly help me with this maths problem. Thanks a million in advance. Regards Kumar 1)17 ... A: 1) There are 17 papayas and 96 guavas. Since it takes 6 guavas to have the same weight a 1 papaya, ... | |
| Algebra | 8/6/2010 |
| Q: A grasshopper is perched on a reed 5 inches above the ground. It hops off the reed and lands on the ... A: The equation is h = -2x²/5 + 3x/2 + 5. It agrees with the start, for at x = 0, the height h is 5. ... | |
| Math | 8/3/2010 |
| Q: Jupiter revolves around the Sun about once every 12 Earth years. Saturn revolves around the Sun ... A: This problem involves finding the smallest number the 12 and 30 both go into. The prime factors of ... | |
| trig word problem | 7/29/2010 |
| Q: A plane is traveling directly towards you at a speed of 200 mph and at an altitude of 3000ft,and you ... A: If the plane is at an angle of 20° and an elevation of 3,000', that means that the horizontal ... | |
| i need help with this word problem | 7/29/2010 |
| Q: i need help with this, i havent done math like this in 23 yrs: thea computer user receives a joke ... A: This is one person, so that counts for 1. There are 50 people in his address book, so that counts ... | |
| Word Problem | 7/22/2010 |
| Q: I kind of had a hard time figuring out this word problem do you think you can help me with it, if ... A: If there was one cook, he would make pizza every 15 minutes, and after one hour, since 15 minuts is ... | |
| College Algebra | 7/20/2010 |
| Q: The base of a triangle is four more than twice its height. If the area of the triangle is 42 square ... A: The height is h. The base is 4+2h. The area is bh/2 = (4+2h)h/2, and is also 42, so we have ... | |
| profit and loss | 7/12/2010 |
| Q: A vendor buys 100kg apples at the rate of Rs.20 per kg. He sold 40kg at a loss of 7%.At what price ... A: I'm not sure what Rs. is, but does, "Rs.20," mean, "20 Runescape"? I'll go with that. At 100kg ... | |
| stat | 7/11/2010 |
| Q: this question is giving me a hard time. 'We want to know the probability of flights arriving on time ... A: Yes, the first statement of 86% being on time is correct. So when you get to the airport, 86% of ... | |
| Intermediate Algebra | 7/7/2010 |
| Q: A steamboat travels 10km/h faster than a freighter.The steamboat travels 69 km in the same time the ... A: Let the freighter travel at f km/h. This means the steamboat travles at 10+f km /h. Speed = ... | |
| how do i set this up? thanks | 7/6/2010 |
| Q: A fuel tank was app. 1/8 full. after adding 450 worth of fule the tank was 3/4 full. if the fuel ... A: If it was 1/8 full at the start and 3/4 full at the end, then 3/4 - 1/8 was filled. Now 3/4 needs to ... | |
| how do I solve this thanks | 7/6/2010 |
| Q: four pumps begin draining a 5400 gallon pool. at the same time, two pumps begin draing a 4000 gallon ... A: Since the 5400 gallon pool has four pumps and the 4000 gallon pool only has two, the larger pool is ... | |
| Story problem | 7/5/2010 |
| Q: According to the data from the U.S. Census Bureau , The population P of Cleveland, Ohio(In ... A: Putting this in Excel and trying out values, the following table was found: Year Population ... | |
| age problem | 7/4/2010 |
| Q: If wali is twice older than ali.and if kiran is two times elder both of them.the sum of their ages ... A: Wali is age x. That is twice as old as ali, so ali is x/2. The sum of both of them is 2x/2 + x/2 = ... | |
| Algebra | 7/1/2010 |
| Q: A 12-pound puppy is gaining weight at a rate of 2/3 lb per week. How much more time will it take for ... A: The equation to solve is 12 + 2x/3 = 37 2/3. Now 12 = 36/3 and 37 = 111/3, so the equation si ... | |
| solving word problems | 6/30/2010 |
| Q: Marty has a piggy bank that contains $2.25. the piggy bank contains only quarters and dimes. There ... A: There are d dimes and q quarters. Dimes are 10 cents and quarters are 25 cents. The problem gives ... | |
| maths | 6/29/2010 |
| Q: if 150 days are needed to do work part time and the start date is 6th september, what is the end ... A: I did it in Excel. Here are the results: A 6-Sep B 50 A+B 26-Oct Another way is to note that ... | |
| Algebra - rate / distance | 6/29/2010 |
| Q: If Sue is 20 miles ahead when Joe starts. If he catches her in 5 hours and runs twice as fast as she ... A: Sue runs x in 5 hours and Joe runs 20+x in 5 hours. If he runs twice as fast, then for each mile ... | |
| Setting up this equation | 6/21/2010 |
| Q: James has three times the marbles Anne has. Anne has two thirds the marbles Mike has. There are 99 ... A: Yes, but this is the simplest one that involves integers. If it sounded better, it could be said ... | |
| Trig word problem | 6/20/2010 |
| Q: The angle of elevation from the top of a house to a jet flying 2 miles above the house is x radians. ... A: If the plane is 2 miles high and d miles away, these are perpendicular measurements. It is known ... | |
| Setting up this equation | 6/20/2010 |
| Q: James has three times the marbles Anne has. Anne has two thirds the marbles Mike has. There are 99 ... A: The ratios of James to Anne is 3:1, and the ratio of Anne to Mike is 2:3. A good number to choose ... | |
| Worded Equation | 6/16/2010 |
| Q: On a maths test, one of the questions was; A girl was talking to her new friend online and after a ... A: Let the this girl be x and the other be y. Three years ago, they were x-3 and y-3. She was a year ... | |
| physical science | 6/10/2010 |
| Q: to complete the table below for a 0.200-kg pendulum bob ("weight") trajectory: height (m) Speed ... A: Variables: ------------------------------------ The Kinetic Enery is mv²/V, and V = 2. Given PE = ... | |
| Algebra Word Problem | 6/9/2010 |
| Q: The Green People of planet Xyz decided that they hate the Blue Folks that share their planet because ... A: This is a quadratic equation and the solution sought is y0 = (-b±√(b²+0.0108))/(-0.0002). I ... | |
| Pre-calc word problem | 6/7/2010 |
| Q: A construction company wants to build a parking lot with a fence around it. The lot will be ... A: The depth of the lot is x, which means that requires 2x fence. This leaves 4200-2x. The area would ... | |
| math-linear equation | 6/3/2010 |
| Q: how much pure alcohol is added to 400ml of a 15% of a solution to make it strenth 32%? A: The amount of alcohol is 15% of 400 ml, which is 60 ml. If we want to add pure alcohol, solve the ... | |
| Wet Mixture Problem | 6/3/2010 |
| Q: If 90 ml of a 40% citrus solution and 20 ml of a 25% citrus solution were mixed with a 60% citrus ... A: If 90 ml of 40% solution is used, this means there is 90(0.40) ml of citrus, which is 36 ml. If 20 ... | |
| Math Problem HELP!! | 5/26/2010 |
| Q: Ryan has three times as many stamps as hal and twice as many stamps as Jimmy. If they have 330 ... A: Problem: Lets start by saying the Ryan has n stamps. This means that Hal has n/3 stamps, since three ... | |
| Word Problem | 5/25/2010 |
| Q: A total of 610 tickets were sold for the school play. There were 60 more student tickets sold than ... A: If tickets to the students is S, then tickets to the adults is S-60. Add together S and S-60 and the ... | |
| Word Problems | 5/24/2010 |
| Q: This question is puzzling me greatly: The total annual interest gained from two investments is $120. ... A: Take some amount of money x as the amount invested at 2.5%. This means that x+400 was invested at ... | |
| System of linear inequalities word problem | 5/23/2010 |
| Q: During an illness Gregory supplements his daily diet with vitamin pills. Each day he needs at least ... A: Doing this involves a linear programming problem. The top row would be Z = -3x-4y. The constraint ... | |
| 4th grade word problem | 5/22/2010 |
| Q: I'm trying to help my grandson. This is supposed to be a 4th grade word problem! There are 180 ... A: If there are four times as many yellow balls as there are of the other colors, this means that there ... | |
| Math | 5/20/2010 |
| Q: Ervin's Garage charges a fixed rate as well as a shop fee per hour. Dave received a bill of $36.00 ... A: Base amount is b; charge per hour is m. This makes the equation y = mx + b. Note that 30 minutes is ... | |
| Word problem using system equation | 5/20/2010 |
| Q: In business studies test 30 more students passed than failed. In the next test, 7 students who ... A: 1st test: x+30 pass, x fail; 2nd test: x+23 + x/3 pass; (x+30)/3 failed; x+23 + x/3 = 4x/3 + 23 = ... | |
| math | 5/19/2010 |
| Q: use the digits 0 thru 9. make the smallest answer you can that is less than 300 in a subtraction ... A: I found 4 ways of doing it. They are This one 30145 - 29876 and this one 70123 - 69854 both are ... | |
| chemistry | 5/17/2010 |
| Q: I have been racking my brain on this one. Could you please help me? A 17.7g aluminum block is ... A: The cooling of the aluminum must be the same as the warming of the water. The new temperature of ... | |
| linear equations | 5/17/2010 |
| Q: The director of a summer camp estimates that 100 children will join if the camp fee is $250, but for ... A: For 100 children, fee is $250. For each decrease of $20, 10 more children will enroll. Thus, for ... | |
| Sinusoidal Functions | 5/16/2010 |
| Q: 1)The diameter of a car's tire is 60 cm. While the car is being driven, the tire picks up a nail. ... A: 1) If the diameter d = 60 cm. The circumference = 2πr, and r = d/2, so the circumference is ... | |
| Problem Solving for Teachers | 5/15/2010 |
| Q: Wilson: John took all the money out of his savings account. He spent $50 on a radio and 3/5 of what ... A: A picture can be drawn for better understanding. Make the original amount of money a circle, and ... | |
| slution | 5/14/2010 |
| Q: A flying company offers trips in Europe. The company flies three kinds of airplanes: the Boeing 757, ... A: I see no charge other than the price of planes. If 7 Airbus 100's were taken, they would have just ... | |
| algebra | 5/14/2010 |
| Q: There is a pool with a sidewalk around it. The pool measures 6m by 10m and the total area of the ... A: Thinking the answer will be a whole number, lets take the walk as 1 ft wide. Since there is walkway ... | |
| Statistics | 5/13/2010 |
| Q: If a club has 35 members which 15 are female & 25 are male, how many different 3 member committies ... A: The total members is 35+15=50. If each person is different, the number of different groups is ... | |
| slution | 5/13/2010 |
| Q: A flying company offers trips in Europe. The company flies three kinds of airplanes: the Boeing 757, ... A: Let X be the number of 757's, Y be the number of 767's, and Z be the number of 777. In the 757, ... | |
| Linear Programming | 5/12/2010 |
| Q: could u please guide me i'm stuck in the interprtation of a liear programming statement and ... A: It took me a few minutes to determine that the equation to optimize is not at the top. There are ... | |
| Permutations | 5/11/2010 |
| Q: Okay so I have a question and it's probably simple but anyway, it's "Find the number of permutations ... A: There are 13 ways to select the 1st letter, 12 ways to select the 2nd letter, 11 ways to select the ... | |
| Algebra | 5/5/2010 |
| Q: A lot is in the shape of a right triangle. The shorter leg measures 60 meters. The hypotenuse is ... A: For right triangles, a² + b² = c², where a and b are the sides and c is the hypotenuse. If we take ... | |
| geometry | 5/4/2010 |
| Q: If I have the dimensions of a sqare or rectangle is there a formula for finding the distance cross ... A: If the dimensions of a rectangle are length x and width y, then the length of the diagonal is ... | |
| word problem | 5/4/2010 |
| Q: In the right figure, AD = 3, BC = 5 and C D = 8. The angle ADC and BC D are right angle. The ... A: Choose a point X on DC. The distance to A from x is the hypoteneuse of the right triangle ADX, ... | |
| multiple variables | 5/2/2010 |
| Q: How do you solve the following problem: Melinda receives an annual income of $234.50 from investing ... A: She had some amount of money A. She split it into amount B and A-B. She invested B at 0.06 and A-B ... | |
| Problem Solving for Teachers | 5/1/2010 |
| Q: I am studying Elementary Education and I just do not understand some of my word problems. I would ... A: a. The cost is 20 base plus 25 per hour, so the equation is 20 + 25h. b. If there are d dimes, ... | |
| distance problems | 4/30/2010 |
| Q: pat and jeff walked to the dock at 3 miles per hour, jumped into the boat, and motored to Dillion at ... A: Let x be the hours he spent in the boat. This means the distance rowed was 11x. That also means ... | |
| math | 4/28/2010 |
| Q: Cheryl has $1.15 made of American coins. With these coins, however, she cannot change a dollar, half ... A: She must have a half dollar, a quarter, and 4 dimes. That is 50c + 25c + 10c + 10c + 10c + 10c = ... | |
| college algebra | 4/27/2010 |
| Q: I have a question that I would like to ask you about college algebra. My question is this: How do ... A: Note that in Fahrenheit, freezing is at 32° and boiling is at 212°, for a difference of 180°. In ... | |
| maths/ lcm | 4/27/2010 |
| Q: A red bulb switches on-off 20 times in 5 minutes. A green bulb switches on-off 30 times in 10 ... A: To swithc on-off 20 times in 5 minutes means there are 4 times in a minute, so it is on for the 1st ... | |
| how to contruct a quadratic equation | 4/26/2010 |
| Q: A retailer spends $48 to purchase a number of mugs. Two were broken in the store, but by selling ... A: Amount spent: 48 for x mugs. She broke 2, so the number left is x-2. She sold them at $3 over the ... | |
| how do you write this question as equation | 4/26/2010 |
| Q: Two peoples ages when multiplied together is 132. If these two people were born within 1 year of ... A: To get the answer, solve n(n+1) = 132. Take n, find n+1, and then find the product. For example, ... | |
| Math | 4/21/2010 |
| Q: If it takes 4 hours to paint 350 sq ft, how long will it take to paint 900 sq ft? ANSWER: 350 ft²/4 ... A: It looks like I slipped up. Lets do it again. If it takes 4 hours to paint 350 ft², then 350/4 ... | |
| Math | 4/21/2010 |
| Q: If it takes 4 hours to paint 350 sq ft, how long will it take to paint 900 sq ft? A: 350 ft²/4 hr is the same as ... well, divide the top and bottom by 4. This gives 350/4 = 85/1, so ... | |
| math | 4/20/2010 |
| Q: in what time will a sum of money treble itself at 8(1/3)% simple interest? A: Suppose we start with 1. It will triple when it is worth 3. The future value is (1 + 25/300)^n = 3. ... | |
| Help please | 4/20/2010 |
| Q: I have come across a hard question and I was wadering if you could help me ? The formula converting ... A: To find out were they are equal, that means that in centigrade we are at x° and farenheight we are ... | |
| word problem with variables | 4/14/2010 |
| Q: The length of a rectangle is 9 cm more than four times the width. The product of three and three cm ... A: For the length L to be 9 more that 4 times the width W, we get L = 4W + 9. The product of 3 and 3 ... | |
| Solving for unknowns from word problems | 4/14/2010 |
| Q: Staples sells cartons of pens($10) and rubber bands ($4). Leona ordered a total of 24 cartons for ... A: Lets say there are x cartons of pens that are bought. Since she bought 24 total cartons, that is ... | |
| math | 4/13/2010 |
| Q: Pretend that you are a financial consultant. A person comes into your office and says that he wants ... A: The present value is P, the future value is F, and the annuity (monthly payment) is A. The interest ... | |
| algebra word problems | 4/13/2010 |
| Q: Paul has 64 coins in a piggy bank. They are all nickels and dimes. He has a total of $3.65. How ... A: Let us say that he has x dimes. This means that he has 64-x nickels, since all the coins are dimes ... | |
| abstract rate problem | 4/12/2010 |
| Q: If p players could score 5 points in 30 minutes, how many minutes would it take 2 more players to ... A: If p players score 5 points in 30 minutes, then p players score 1 point every 6 minutes. If we had ... | |
| Algebra Word Problem Help | 4/8/2010 |
| Q: Concert tickets cost $25 for the balcony and $40 for the floor. If the total amount collected was ... A: The the number of balcony tickets be B and the number of floor tickets be F. It is given that 25B + ... | |
| algerbra | 4/8/2010 |
| Q: How do you write out the following inequality? Adam and his brother shoot hoops. Adam scores half ... A: Adam makes half as many free throws. It doesn't really matter how many his brother makes, other ... | |
| Math follow up | 4/7/2010 |
| Q: the sum of two numbers is 18 less than twice the first number. their difference is 32 less than ... A: The two numbers are x and y. The 1st sentence says that x + y = 2x - 18. The 2nd says that (a) x - y ... | |
| Bell Curve Question | 4/6/2010 |
| Q: This is a question from the Princeton Review GRE study guide. It is a standard deviation/bell curve ... A: If there are 300 students with a total weight of 21,600 pounds, the average weight of each student ... | |
| Precalculus | 4/5/2010 |
| Q: Two LORAN stations are positioned 300 miles apart along a straight shore. A) a ship records a time ... A: A) It can be seen that 0.00045 * 186000, which is 0.45*186. Now .4 times 186 is 74.4 and 0.05 times ... | |
| inverse ratio | 4/2/2010 |
| Q: we have two different sinks when both are used they fill the barrel in 4 hours when one is is used ... A: Since both sinks fill the sink in 6 hours and one sink fills it in 12 hours.... Take X as the 1st ... | |
| Math word problem | 3/31/2010 |
| Q: There are 3 sorts of chocolates in a box. $2 toffee, $3 cherry and $1.50 chocolates. The number of ... A: Let A be $2, B be $3, and C be $1.50. The equations are A = 2B + 1, C = B - 2, and 2A + 3B + 1.5C = ... | |
| Physical Science | 3/31/2010 |
| Q: 1.)The distance between the earth and the sun is 93,000,000 miles. How far is this in Kilometers if ... A: 1. Take 93,000,000 * 0.6214. Note that that answer should also be rounded to two digits, so it looks ... | |
| Math | 3/30/2010 |
| Q: A circular path around a lake has a diameter of 3,000 feet. Pranotti jogs around the path 5 times ... A: It is known that the circumference of a circle is 2πr, and that the diameter d = 2r, so the ... | |
| am I reading this correctly? | 3/29/2010 |
| Q: A large table for a conference is to be constructed in the shape of a rectangle with two semicircles ... A: Let L = length of the rectangular portion, r = radius of the circle; note that half of the circle is ... | |
| Inequalities | 3/26/2010 |
| Q: There are three basic constraints. the cost of the materials, time for cutting and carving, and time ... A: Let C be the cost, B be cutting time, and A be assembly time (C=Cost, A=Assembly, so other is B). a. ... | |
| Business Math Word Problems | 3/26/2010 |
| Q: The Dallas Morning News on June 12, 2006 reported on saving for retirement. Carl Hendrik is 56 ... A: Age 56 to 65 is 9 years. It doesn't really matter how long he has worked, it only matters that he ... | |
| help with math problem | 3/25/2010 |
| Q: a farmer needs to how many hens to get of each breed. an araucana hen lays 220 eggs a year and needs ... A: The total tickets was 513. The total revenue was $3,988. The price was $10 adult, $8 senior, $5 ... | |
| Permutation & Combination | 3/24/2010 |
| Q: How many three digit numbers can be made out of all the numbers from 1 to 9 with out repeating any ... A: If you start with 9, the other two must be 0, therefore there is a repeat. If you start with 8, the ... | |
| Probability | 3/23/2010 |
| Q: The probability of a bomb hitting a target is 1/3. Two bombs are enough to destroy a bridge. If 5 ... A: This is the binomial distribution with n = 5 and 1/3. Since 2 bombs will destroy the bridge, it ... | |
| Set Theory | 3/23/2010 |
| Q: In a class of 50, 30 are studying BASIC, 25 are studying PASCAL and 10 are studying both. How many ... A: The number in BASIC is 30 and the number in PASCAL is 25, with 10 studying both. Since there are 30 ... | |
| algebra | 3/22/2010 |
| Q: Granddma's age is 8 years less than 7 times Stephanie's age. The sum of their ages is 95. Find the ... A: Grandma is G and Stephanie is S. This says that G = 7S - 8 and G + S = 95. Take the 1st equation ... | |
| college algebra | 3/19/2010 |
| Q: A portion of a roller coaster track is to be built in the shape of a parabolic function. The high ... A: Put the x values -6, 2, 8, 14, 20, 26, 32, 38, and 44 into the equation. This will give you 9 y ... | |
| word problem | 3/16/2010 |
| Q: hey Stephen, A father, being asked by his age and that of his son,said, "if you add 4 to my age and ... A: Let F=father's age and S=son's age. The two equations to solve are (F+4)/4=S and (F-6) = 7.5(S-6). ... | |
| Math | 3/15/2010 |
| Q: Colin typed a six digit number but what appeared on his paper was just 2002. He knew he typed two ... A: Think of the number as 6 different places. We want to known how many locations there would be for 2 ... | |
| intermediate algebra | 3/15/2010 |
| Q: One pump can drain a pool in 10 min. When a second pump is also used, the pool only takes 8 min to ... A: The pool has a volume V. Pump 1's rate is V/R1 = 10. Pump 1 and 2's rate is V/(R1+R2)= 8. This ... | |
| area | 3/14/2010 |
| Q: I bought 36 yards if fence material. We are going to put the fencing around a rectangular garden ... A: This fence has a maximum of the 20' on one side, but if the amount of side needed comes out less ... | |
| college algebra | 3/13/2010 |
| Q: A portion of a roller coaster track is to be built in the shape of a parabolic function. The high ... A: Using x-y graph paper, it can be drawn. We are told the width is 48 and the height is 30. The ... | |
| Permutations | 3/11/2010 |
| Q: In how many ways can the letters of the set {M,N,O,P,W} be arranged to form ordered codes of 4 ... A: Here it makes a difference which order the letters are in, for we all know there is a difference ... | |
| word problems | 3/9/2010 |
| Q: A new employee is hired at a starting salary of $1,000 per month. She gets a $50 raise every month. ... A: Here 1st month will be at $1,000. She will not get a raise until after this month. Her 12th month ... | |
| World Problems - Simultaneous equation | 3/8/2010 |
| Q: could you please provide the steps/working out and answer for this questions below as soon as ... A: The variables are W for time walking and R for time running. Since the total time is 3 and 3/4 = ... | |
| math question using venn diagram | 3/5/2010 |
| Q: A survey was conducted in a library, and 70 people were asked whether they were looking for fiction ... A: We;re given that 7 people read both. This means that there are 50-7=43 people who read only ... | |
| Rate/Distance time Problems | 3/4/2010 |
| Q: A bus travels 387 km in 5 hours. 1 hour of the trip was in city traffic. The bus's city speed was ... A: Take the city speed as S. This makes the traffic speed 2S. Since distance D is rate R times time T, ... | |
| Applications of linear equations | 3/3/2010 |
| Q: the owner of a tea shop wants to mix three kinds of tea to make 100 oz of a mixture that will sell ... A: Goal:83c Orange Pekoe 80c Irish Breakfast 85c Earl Grey 95c Twice as much Orange as Irish is ... | |
| statistics question! | 2/28/2010 |
| Q: Q) In a test given to 2 sections of mathematics course the average grade is 60.98. Section 1 has a ... A: I put the data in a spreadsheet. I know the total is the average * number of people. In the 1st ... | |
| I need help with a Word Problem! | 2/28/2010 |
| Q: You and your brother started biking at noon from places that are 52 miles apart. You rode towards ... A: You start out 52 miles apart, and 2 hours later you meet. Therefore the average speed between you ... | |
| math | 2/27/2010 |
| Q: A 49 ft by 55 ft room is tiled with 1 ft squared tiles. Diagonals are drawn. how many tiles do the ... A: Looking at the direction of the larger number, it would cross 1 diagonal at each corner, and then it ... | |
| hy | 2/27/2010 |
| Q: a group of 200 students whose mean height is 60.96 inches is divided into two groups,one having mean ... A: I used Excel. If put 63.4 in A1 and 57.3 in A2. In B1, I put 1 and in B2, I put 1. In C1, I put ... | |
| Tricky Interest Problem | 2/26/2010 |
| Q: I wanted to know if you could help with this tricky problem involving interest: Sara invested some ... A: I will assume simple interest for 1 year. She has x at 5%, so she has 2x at 4%. The equation is ... | |
| algebra | 2/25/2010 |
| Q: at noon a train leaves Washington dc HEADED FOR CHARLESTON SOUTH CAROLINA,A DISTANCE OF 500 MI. THE ... A: I assume there are two tracks, or there's going to be a problem. Now about when that will occur, ... | |
| Help | 2/23/2010 |
| Q: Gretchen has been offered a job with another company doing generally the same work she does now. She ... A: The data is $32,000 per year, so divide by 12 to get the amount per month, so x=32,000/12. Add ... | |
| Math | 2/22/2010 |
| Q: Chris can row a boat a distance of 20 miles in 2.5 hours with the current. Chris can row the boat ... A: Calculate the speed in both directions. The current is half the difference between them. For 20 ... | |
| word problem | 2/19/2010 |
| Q: At 20 kilometers from shore the incoming boulders were located at 2800 meters of altitude. At 40 ... A: We need to use three points to determine a parabola. Let x be the horizontal distace and y be the ... | |
| maths | 2/17/2010 |
| Q: A can do piece of work in 5 days and B can do the similar work in 15/2 days.A did work for 2 days ... A: If A can do it in 5 days and B can do it in 15/2 days ... lets see ... Person A has worked for 2 ... | |
| Compound interest | 2/16/2010 |
| Q: Sue wants to invest $20/week for 30 years at 5% interest compounded monthly. How do you write the ... A: I'm sorry I was rushing through the question. You're right - it should be divided by 12, since it ... | |
| Percent | 2/16/2010 |
| Q: A stack of wood that is 8 feet long, 4 feet wide, and 4 feet high is called a cord. Mike has a stack ... A: Correct. Now I tried to just put correct, but that was not enough words for me to send the answer ... | |
| Percent | 2/15/2010 |
| Q: A stack of wood that is 8 feet long, 4 feet wide, and 4 feet high is called a cord. Mike has a stack ... A: A cord of wood is 8x4x4 = 512 ft³. A. The amount of wood in his truck is 6x8x2 = 96ft³. Take 96/512 ... | |
| Compound interest | 2/15/2010 |
| Q: Sue wants to invest $20/week for 30 years at 5% interest compounded monthly. How do you write the ... A: The weekly interest is 0.05/52 = i = 0.000961538 The number of periods is 52*30 = n = 1560. The ... | |
| Math- -Algebra | 2/12/2010 |
| Q: At 11 am. Eric headed West at 4 mph and at 4 pm Jose started East from the same place at 10 mph. ... A: Since they are going in oppositive directions, the total increase in distance between them is then ... | |
| story problem help | 2/12/2010 |
| Q: Mulder and Scully are driving to Georgia to investigate a reptile that inhabits one of the great ... A: Mulder left 15 minutes before Scully, and that is ¼ hours. It is known that d = rt, that is, ... | |
| Fractions & Word Problems | 2/10/2010 |
| Q: 1. If 63 books cost $126, what will 125 books cost? Calculation: ($126 X 125)/63 Explanation: If ... A: Yeah, 1 is right. 2. You would use neither one. Problems like this involve ab = c. In the first ... | |
| trigometry | 2/10/2010 |
| Q: a 20ft ladder is leaning against a vertical wall at an angle of 78 degree. how far from the wall is ... A: If the ladder is 20' long, that is the length of the hypoteneus. The angle is 78°. That means the ... | |
| LUMBER AND CONCRETE | 2/9/2010 |
| Q: We have a garden that measures 17 feet by 20 feet. We want to pour concrete for a 3-foot-wide ... A: The inside of the walk is around the garden, so there are two sides of length 17' and two sides of ... | |
| Ratios | 2/7/2010 |
| Q: Is it possible to determine the answer to a proportion that has three terms? Example: Four ... A: When the ratio is not 1:1, whcih corresponds to the fraction 1/1, that is when the numbers are ... | |
| Matrix Equation | 2/7/2010 |
| Q: You have $18,000 to invest in stocks. The annual return on stock X, stock Y, and stock Z are 10%, ... A: For interest, it is given that (A) 10x + 9y + 6z = 8(144,000). It is also given that (B) x + y + z = ... | |
| Chemistry | 2/6/2010 |
| Q: 1)What is the molarity of a hydrochloric acid solution that has a volume of 1500 mL and contains 441 ... A: I will use the table www.chemicalelements.com/show/mass.html. If you want to look at the table, cut ... | |
| Chemistry | 2/5/2010 |
| Q: 1)What is the molarity of a hydrochloric acid solution that has a volume of 1500 mL and contains 441 ... A: 1) The atomic mass of chlorine is 35.4527 and the atomic mass of hydrogen is 1.00794. These give an ... | |
| Ratios | 2/4/2010 |
| Q: Is it possible to determine the answer to a proportion that has three terms? Example: Four ... A: Take the carpenters C by the days D and the answer will be some constant times the houses H. That's ... | |
| College Algebra motion problem | 2/3/2010 |
| Q: David gets to work in 20 min when he drives his car. Riding his bike (by the same route) takes him ... A: Let distance be D, rate be R, and time be T. The equation is D = RT. For the car, call them R1 and ... | |
| word problem | 2/2/2010 |
| Q: a 200 gallon container contains 100 gallons of water. Water pours in at 1 gallon per minute, but ... A: If water pours out at 5 gallons per minutes and in at 1 gallon per minute, then the overall result ... | |
| train speed | 2/1/2010 |
| Q: a train and a cycle starts from a point.After 10km train passes the cycle.speed of cycle is ... A: Train, Cycle start from same point. After 10km, the train passes the cycle. The speed of the cycle ... | |
| CHEMISTRY | 1/30/2010 |
| Q: i HAVE 2 QUESTIONS ONE GALLON OF GAS IN A AUTOMOBILE'S ENGINE PRODUCES ON AVERAGE 9.5 KG OF CARBON ... A: Now 5,000 miles at 20 miles per gallon is 5000/20 gallons of gas, or 250 gallons. The are 40 ... | |
| Math Clock problem | 1/29/2010 |
| Q: We are trying to figure this out. On July 1, 2007 each of 3 clocks are set to the same time. ... A: Each hour, one clock gains a minute and the other clock loses a minute. My first thought is that ... | |
| word problem | 1/28/2010 |
| Q: on a suduko square with 9 x 9 squares how many squares are there of any size? A: Just looking at the soduko 9x9, there are 81 squares that are seen right way that have a side of ... | |
| Algebra - angle problem | 1/27/2010 |
| Q: 2 angles are complementary if their sum is 180 degrees. The larger angle measures eight degree more ... A: 2 angles are complementary if their sum is 180 degrees. There is an error at the start. If the ... | |
| Physics | 1/27/2010 |
| Q: Throw a ball upward from point o with an initial speed of 42m/s. The acceleration of gravity is ... A: We know the equation for the speed of the ball is 42 - 9.8t. Lets assume the ball was thrown, so ... | |
| math | 1/26/2010 |
| Q: If 4 is added to twice a number and this sum is multiplied by 2, the result is the same as if the ... A: When I read "4 added", I think + 4. When it says "twice a number", that is 2n, and be had a "+ 4" ... | |
| Investment Word Problem | 1/24/2010 |
| Q: Charlie wants to buy a $300 TV in 8 months. How much should he invest now at 9% simple interest to ... A: When the problem states that there is only simple interest, the only interest that needs to be ... | |
| Mathematics | 1/23/2010 |
| Q: the sum of 2 figures of a number is 11. and if the figures are reversed the product will be greater ... A: We are told that x+y = 11 and that 10y+x = 3(10x+y) + 5. The 2nd equation multiplies out to 10y + x ... | |
| Business consumer & math homework help pleasee | 1/22/2010 |
| Q: Fred’s net monthly income is $3933.12 Rental: $700 Car Payment: $363.75 Car Insurance: $46.16 Life ... A: Adding up the rental, car payment, and car insurance gives $1109.91. Addind up the $100, $240, $60, ... | |
| Math-Matrices | 1/22/2010 |
| Q: Amanda is decorating her new home and wants to buy some house plants. She is interested in three ... A: Since the number of each plant is x, y, and z, and she want 13 of them, the eqation is x + y + z = ... | |
| dividing up money | 1/21/2010 |
| Q: G.I. Joe is called up for action. Before he leaves for duty, he writes a will stating how his estate ... A: Suppose that there was some other man with a wife and son. They just received money through an ... | |
| dividing up money | 1/20/2010 |
| Q: G.I. Joe is called up for action. Before he leaves for duty, he writes a will stating how his estate ... A: A son is to get twice as much as the mother, so the son gets 2/3 of 14,000 and the mother gets 1/3. ... | |
| gre -fencing problem | 1/20/2010 |
| Q: length of wire fence around a circle flower bed is 100pi feet.what is area of two foot concrete ... A: The radius of the flower bed is 100/(2*pi). The radius of the bigger circle that includes the ... | |
| Data Maagement question | 1/19/2010 |
| Q: a basketball team has 14 players in total, 3 first year, 5 second year and 6 third year players. a) ... A: There are only 3 first year. It is known that 14-3=11, so that is how many non-first year there ... | |
| Rates | 1/19/2010 |
| Q: If two house painters, working at the same rate, can paint one small house in one day, one house ... A: Your ways of doing it looks right. If two painters take a day to paint a house, that means they ... | |
| Conversions | 1/17/2010 |
| Q: Okay, I got where you said the pedals go about 1/5 the speed of the front wheel, but does the 2.79 ... A: If the front wheel is rotating at 13.96 rotations per minute and the back wheel is 1/5 of the ... | |
| Help with mph to rpm | 1/16/2010 |
| Q: Okay, so say we are talking about a tricycle. The front wheel has a diameter of 17 inches. And is ... A: I did the conversion and got close to 1/5 as well, but just a little off. Given, we have the ... | |
| Asked for information. | 1/16/2010 |
| Q: Will ordered 2 times as many boxes of ballpoint pens as boxes of felt pens. Ballpoint pens cost ... A: Let X be the number of felt pens. Then 2X is the number of ball point pens. The total price would be ... | |
| Mathematics | 1/13/2010 |
| Q: After two weeks, the total money saved in the jar is $7.65. How many dimes and how many quarters ... A: There must be at least 4 dimes, so what is left over is $7.25. There must be at least 1 quarter, ... | |
| Word problem please help | 1/11/2010 |
| Q: SO here is my question... You are running a factory that makes widgets, gizmos, and thingees. You ... A: Solve the set of equations 2w + 4g + 1t = 46 5w + 2g + 4t = 77 3w + 5g + 2t = 68 This gives ... | |
| Mathematics | 1/10/2010 |
| Q: A manufacturer has two plastic molding shops and must produce at least 1500 model cars and 900 model ... A: Let x be the hours A is worked. Let y be the hours B iw worked. The number of model cars is 120x + ... | |
| Math Algebra | 1/10/2010 |
| Q: The perimeter of a square garden is 12 meters greater than the perimeter of a smaller square garden. ... A: The garden was given as square, so each side is x on the small garden and y on the bigger. This ... | |
| Time distance | 1/7/2010 |
| Q: It takes Alan six minutes to run up the staircase of a block of flats and one minute to run down. ... A: The slow one takes off and flies for 15 minutes, which is a quarter of an hour. In this time, at 100 ... | |
| Time distance | 1/6/2010 |
| Q: It takes Alan six minutes to run up the staircase of a block of flats and one minute to run down. ... A: Alan: 6 up, 1 down, 6+1=7 minutes total, so every 7 minutes he is at the bottom. Barbara: 8 up, 1 ... | |
| porfit and loss | 12/24/2009 |
| Q: a wholesaler bought 20 sacks of wheat for Rs. 24000.he sold 8 sacks at a gain of 10%.at what percent ... A: Since he bought 20 sacks for 24000, that means they were for 24000/2 = 1200 each. A 10% profit would ... | |
| Calculus | 12/21/2009 |
| Q: The volume of the can is 1000 cubic centimeters. The cost of the material is $1.00 per square meter ... A: I forgot to take into account the units involed; in the following, V is in cm³ and cost of material ... | |
| Impossible? | 12/19/2009 |
| Q: You have probably seen this problem before. My friends and I have been trying to figure out if it is ... A: The men paid $30, but got back $1 dollar each, so they paid $27. Of this $27, $25 went to the front ... | |
| stuck on investment question | 12/17/2009 |
| Q: The difference bewteen two loans is $10,000, both loans have 5% annual interest rate. If the total ... A: Let the loan amounts be X and Y. The difference is $10,000, so X - Y = $10,000. Both have a 5% ... | |
| equations for graphing | 12/16/2009 |
| Q: Please help! I need to graph two equations for this problem. If you can help me with the equations ... A: The 1st equation is a line y = 2x + 75 where y is the total cost and x is the number of movies. The ... | |
| Fractions | 12/15/2009 |
| Q: Liz baked cookies for a holiday party. 3/8 of the cookies were chocolate chip, 5/16 were oatmeal ... A: This leads to the equation 3x/8 + 5x/16 + 7x/32 + 6 = x. Convert the first two terms on the left ... | |
| Parabola/quadratic function word problem | 12/14/2009 |
| Q: In my pre-calc class I was assigned to write an in depth word problem with a real-set of data, with ... A: Use numerical analysis to find the answer. That is, the data is given in x-y format. A good place ... | |
| Math | 12/13/2009 |
| Q: Prepare 2 word problems on percentages involving base, amount and rate (%). A: 1. If a box of crackers normally sells for $3 and is discounted to $2.25, what is the percent ... | |
| chemistry w/ math | 12/11/2009 |
| Q: An aluminum skillet weighing 1.58 kg is heated on a stove to 173 oC. Suppose the skillet is cooled ... A: The change in temperature is (173-23.9)°C = 140.1°C. The weight is 1,580g. This means that it ... | |
| math | 12/10/2009 |
| Q: leanne is making a box to collect paper for the school paper drive. she cuts a 5 inch square from ... A: The sheet of cardboard will have length L and width W. If she cuts out 5 inch sqares, that means the ... | |
| Word Problem | 12/9/2009 |
| Q: A farmer has 8,000 feet of fencing. He wans to enclose a rectangular plot and then divide it into ... A: The pasture will be L by W. Note that 2L + 2W = 8000, or, dividing by 2, L + W = 4000. The area of ... | |
| arithmetic sequences | 12/8/2009 |
| Q: In an arithmetic series, the terms of the series are equally spread out. For example, in ... A: The sum from 1 to n by 1 is n(n+1)/2. The sum from a to n by 1 is n(n+1)/2 - a(a+1)/2. Subtract 3 ... | |
| linear word problems | 12/8/2009 |
| Q: How do you know which value is x and which value is y? or does it matter? example: crikets produce ... A: Take x1=70 and y1=120, x2 = 80 and y2 = 170. Note that m = (y2-y1)/(x2-x1). The equation is then ... | |
| math | 12/2/2009 |
| Q: The weather during Phil Possum's vacation was strange. It rained on 15 different days but it never ... A: From what's given, it was never raining for a whole day. The following is just an explanation of ... | |
| Math | 12/2/2009 |
| Q: I would appreciate much if you would help me with this. If 4 worker creates 5 slides in 4 ... A: If 4 create 5 slides in 4 minutes, it is known that 1 person creates 5/4 slides in 4 minutes. In ... | |
| compound interset | 12/1/2009 |
| Q: $6250 is compounded semiannually at a rate of 16% for 15 years. A: Since the yearly interest is 16%, and the compounding is semiannual, that is 8% per period. Since ... | |
| Math Word problem | 12/1/2009 |
| Q: I hope you caqn help with this: I planned to buy a used car, One car I liked was priced at $3,211, ... A: The possible choices are A) 7 1's, but that is over a million, and that is to high. B) 5 1's and ... | |
| using equations in solving number problems | 11/30/2009 |
| Q: the sum of the two numbers is 60. Represent in terms of x the larger number if the smaller number is ... A: If the smaller number is 5x-4+x, that is 6x-4. If the sum is 60, the other number is 60-(6x-4) = ... | |
| Solving Linear Equations in 3 variables | 11/29/2009 |
| Q: Help!!!! Suppose you are the director of purchasing for a large commercial airline company. Several ... A: Let A = # OF 747, B = # OF 777, and C be the number of European planes. The equations turn out to be ... | |
| Math-Alegbra word problem | 11/29/2009 |
| Q: I am unable to answer the following question and need your assistance: A man has 20 coins ... A: The number of coins is 20, and they are quarters and dimes. Let Q be the number of quarters and D be ... | |
| prealgebra word problem | 11/26/2009 |
| Q: A homeowner's mortgage payment for one month for principal and interest was $949. The principal ... A: If the principal was $204 less than the interset and the total was $949, ... Well, let P be the ... | |
| direct & Inverse proportions | 11/25/2009 |
| Q: AB can do a work in 35 days. A alone can do the same job in 60 days. How many days does B require ... A: Since A&B can do the job in 35 days, that means in one day, A&B can do 1/35 of the job. Since A can ... | |
| Trig word problem | 11/23/2009 |
| Q: Hey Scott, I am having trouble figuring this problem out. I would really appreciate it if you could ... A: Since 500' is given as the height, that is vertical. Since the distance on the ground is horizontal, ... | |
| compound interest | 11/22/2009 |
| Q: $807.00 for 9 years in an account that gives 4% annual interest compunded monthly. A: There is $807 in an account. The account pays %4 interest. The interest is compounded monthly, ... | |
| math problem | 11/21/2009 |
| Q: willson, in an elevator 12 adults or 20 enfants can be in at the same time .If there are 9 adults ... A: Say the total amount of space is in the elevator is A. It is given that 12 adults can fit in A, so ... | |
| Percentages | 11/21/2009 |
| Q: An investor invests $3000 into two accounts earning 2% and 5% simple interest for one year. How ... A: Taje $x abd invest it at 2%. That leaves $(3000-x) to be invested at 5%. The equation to solve is ... | |
| maths problem | 11/20/2009 |
| Q: a bicycle dealer allows 10% discount and still makes a profit of 20% on his bicycle if the total ... A: Let me see if I understand the problem. A bicycle dealer allows 10% discount on his bicycles. He ... | |
| Math | 11/20/2009 |
| Q: ok if i have a 6 digit number how many possible codes can it be using the numbers 0-9 and you can ... A: Since the numbers go from 000000 (which is 0) to 999999, which is 999,999, that looks like a million ... | |
| Solving Systems of Linear Equations in Three Variables | 11/19/2009 |
| Q: I am so confused. For homework this week my teacher gave us a critical thinking activity on 'solving ... A: Suppose you are the director of purchasing for a large commercial airline company. Several years ... | |
| Math Story Problem | 11/18/2009 |
| Q: The halftime marching band (football) must stand in a formation meeting these requirements: 1. ... A: If a 5 pointed star is made with the top point on the 50 yard line and 21 people on each sides, this ... | |
| sinusoidal function | 11/18/2009 |
| Q: The motion of a clock's hour and minute hand around the clock face can be modelled by a sinusoidal ... A: 1a) The height of the end of the hands above the middle looks just like a cos() curve. The distance ... | |
| Math-word problem help | 11/17/2009 |
| Q: The Cougars played two games against the Bobcats. In the games, the Cougars scored a total of 96 ... A: 1. The Cougars could have scored 48 points each game, and the Bobcats would have scored 44 for the ... | |
| Umm | 11/17/2009 |
| Q: Well I was doing a practice test for my exams and I did most of the other questions but this one is ... A: Now I use hamburger in my spaghetti, and here we are going to add bologa. That way, no minced beef ... | |
| math | 11/11/2009 |
| Q: calculate the monthly payment by loan amortization table: loan 26,000 down payment 5,000 11% 36 ... A: I don't have a load amoritization table, but I know the formula. The payment would be on 26,000 - ... | |
| Area of Rectangular | 11/10/2009 |
| Q: A rectangular dog pen pen is to be made with 116 feet of fence wire. An existing property fence will ... A: Perimeter P = 2W + L, since one L is already had, so L = P - 2W. Area A = WL, and L can be put in. ... | |
| inequality word problem | 11/9/2009 |
| Q: I have the following two questions that are stumping me and many others to no end. Any help with ... A: For David, he wants the total to be %150,000 + $80,000 = $230,000 after he pays the realtor 7%. That ... | |
| maths | 11/8/2009 |
| Q: 1.find a fraction which reduces to 2/3 when 3 is added to both its numerator and denominator, and ... A: 1. Let the fractioin be x/y. (x+3)/y = 2/3 and (x+1)/(y+1) = 3/5. The first one says that 3(x+3) = ... | |
| Missing digits | 11/7/2009 |
| Q: Problem: The sum of unused digits is 16 T E N T + S I T E __________ S L E E P ANSWER: S ... A: The three sets of numbers I gave you were A) 0,1,3,6,7,8,9 B) 0,1,2,4,5,8,9 and C) 0,1,4,5,6,8,9 ... | |
| Trig | 11/7/2009 |
| Q: I need help with this word problem, please: A building contractor is planning to use a ladder to ... A: Most the time if the ladder reaches the bottom of the window that's OK, so if the ladder is 18' and ... | |
| Word Problems | 11/7/2009 |
| Q: 1. Find the two real numbers whose sum is 18 and whose product is a minimum. 2. Find the two real ... A: 1. x+y=18, so y=18-x; maximize f(x) = x(19-x) = 19x - x² by solving f'(x) = 0. 2. x+y=24, so ... | |
| need a solving | 11/6/2009 |
| Q: britney steals Jill's skateboard and the skateboard is going 35 mph and it takes Jill 20 seconds to ... A: You've got to look at the units. 35 mph is 35 miles/hour. Now there is 1 hr/60 min and 1 min/60 ... | |
| Rate Distance problems | 11/6/2009 |
| Q: This is a question my son cant figure out and I cant help can you please. At 9:30 a.m. Andrew left ... A: At 10, A has gone 6 miles, so there are 14 miles left between them. The speed combined is 12+16 = ... | |
| word problem | 11/5/2009 |
| Q: a student has 100 coins totaling $5.00. The student has no nickels, what coins does the student ... A: This would mean that 60 of the coins are pennies, so that leaves 40 coins and $4.40. 40 dimes would ... | |
| Missing digits | 11/4/2009 |
| Q: Problem: The sum of unused digits is 16 T E N T + S I T E __________ S L E E P A: S has to be a 1, since there is 1 more digit in the answer and the sum of two distinct digits is no ... | |
| need help getting the equation | 11/4/2009 |
| Q: The feed company sells 1 ounce package containing a mixture of lettuce seeds. Green stem seeds sell ... A: Let p be the percentage in that one ounce package of green stem seeds. This makes 1-p the percentage ... | |
| Transformations | 11/4/2009 |
| Q: For y=3f(2pheta-90')-1 , f(pheta)=sin pheta Evaluate for 30' A: Is that y = 3f(2Θ-90°)-1? By the way, Θ is alt-233 (numbers on the right) and ° is ... | |
| 8th Grade Math word prblem | 11/4/2009 |
| Q: Need help with how to set up following equation. Fred begins walking towards John's house at ... A: It would be the same as if we asked how long it would take on to get across if they walked at (3+2) ... | |
| Linear programming word problem | 11/3/2009 |
| Q: Matt is trying to determine the correct amount of fertilizer that should be applied to his lawn. A ... A: I have put the answer in the attachment. Note that I put a +1 and a -1 where the rows have to have ... | |
| Math | 11/3/2009 |
| Q: A principal of $2100 was invested in the stock market. Some shares of World Oil were bought at ... A: Let the shares of World Oil be W. Let the shares of Zinco Mines be Z. What we are given is that ... | |
| story problem | 11/3/2009 |
| Q: *etra bought gasoline when the odometer read 15,345.4 After the next filling, the odometer read ... A: To get the number of miles that she drove take the ending value on the odometer - start value on ... | |
| fraction story problem please help | 11/3/2009 |
| Q: 1. A recipe for strawberry punch calls for 1/5(qt) of ginger ale and 3/5(qt) of strawberry soda. a) ... A: a) Well, it calls for one fifth of a quart and three fifths of a quart. Since the fractions are 1/5 ... | |
| Ask You somethg. | 11/2/2009 |
| Q: one thing that always come to my mind and still its not being answered yet. To what extend truth in ... A: With basic math, no. In graduate math, there might be one, though I can't recall studying sanything ... | |
| Trig | 11/1/2009 |
| Q: I need help with this problem, please: Two hikers leave a tent at a campground and go separate ... A: Put the campground at the origin on an x-y graph. This would put one town at (-15,0) and the other ... | |
| Fractions | 11/1/2009 |
| Q: I sent you this question recently, and I have a follow-up question that follows your answer to my ... A: I assume second Mary is supposed to be a different person. After all, the first one is 10 and the ... | |
| Trig | 11/1/2009 |
| Q: I need help with this word problem, please: A building contractor is planning to use a ladder to ... A: The ladder is the hypoteneuse of a right triangle. The ground is the horizontal edge and the ... | |
| Fractions | 11/1/2009 |
| Q: I sent you this question recently, and I have a follow-up question that follows your answer to my ... A: If Mary is M and Ruth is R, is this to say that M/2 + 2R/5 + M/4 = 14? That would say that 3M/4 + ... | |
| Algebra i | 10/30/2009 |
| Q: grace dilutes 4.8 fl. oz. of pure hydrogen peroxide with 27.2 floz. of water to make 32 fl oz of a ... A: What would happen if we added 1 oz of hydrogen peroxide, in theory only: 4.8 oz hydrogen peroxide ... | |
| Uniform Motion Problem | 10/30/2009 |
| Q: A passenger train leaves a train depot 2 h after a freight train leaves the same depot. The freight ... A: Time for P is time for F + 2. Both meet after 3 hours. Speed of F is speed of P - 20. This says ... | |
| Fractions | 10/29/2009 |
| Q: 2/3 of Mary’s age equals Sarah’s age and 3/4 of Ruth’s age equals Sarah’s age. If the total ages ... A: 2M/3 = R, 3R/4 = S, so putting R in gives 3(2M/3)/4 = S, so M/2 = S, so M = 2S. Also, it can be seen ... | |
| Uniform Motion Problem | 10/29/2009 |
| Q: a car and a bus set out at 2 p.m. from the same point headed in the same direction. The average ... A: Let C = car spped and B = bus speed. It is known that C+30=2B. Distance in 2 hours is 2C and 2B. It ... | |
| systems of equations | 10/28/2009 |
| Q: a collection of nickels and dimes is $3.30. there are 42 coins in all. how many of each kid of coin ... A: If they were all dimes, that would be $4.20. For each nickel added and dime subtracted, that makes ... | |
| Speed, time & distance | 10/28/2009 |
| Q: Two cars left points A and B simultaneously, traveling towards each other. 9 hours after their ... A: One of the basic physice equation is d = rt, where d=distance, r=rate, and t=time. I will try to ... | |
| Algebra i | 10/28/2009 |
| Q: Grace dilutes 4.8 fluid oz. of pure hydrogen peroxide with 27.2 fluid oz. of water to make 32 fluid ... A: Currently, we have 4.8/32 = 24/160 = 3/20 = 15/100 = 15% as the concentration of hydrogen peroxide. ... | |
| math word problem | 10/28/2009 |
| Q: many of my teachers disagree with the answer some say -10 some say-16 What do you think? Rachel ... A: R and L are swimmers. When L has 2 laps, R has 4 laps. Since they swim at the same rate, this means ... | |
| Math word problems | 10/27/2009 |
| Q: I need help doing these two problems. I have a software of SAT Prep and it gave me these two ... A: The distance from A to B is x. At 40 mph, this takes x/40 hours to drive. At 60 mph, this takes x/60 ... | |
| Advanced algebra | 10/26/2009 |
| Q: A math teacher has a ream of 500 sheets of graph paper. Each week the advanced algebra class uses 90 ... A: a. There are 90 used per week, so that is -90w. They start with 500, so the number of sheet left is ... | |
| Question about figuring inflation | 10/26/2009 |
| Q: The equation S=C(1+r/100)^5 is to find the inflated cost S, in five years of an item, where C is the ... A: If the inflation rate is -0.3%, that means that next year the product will only be worth 99.7% of ... | |
| Problem about two lottery winners | 10/26/2009 |
| Q: Two winners of lottery tickets had a payoff of $3.65 million. If they receie monthly payments over ... A: There is $3.65 million, which is 3,650,000. Divide by 20 to get the amount per year. Now 3.65/2 = ... | |
| Quadratic Function Story Problem | 10/26/2009 |
| Q: Big Bertha, a cannon used in World War I, could fire shells incredibly long distances. The path of a ... A: To find out how far, solve for y = 0. The equation factors into x(-0.0196x + 1.27). The 1st ... | |
| math | 10/23/2009 |
| Q: plane flying at 500 miles per hour leaves chicago. 1/2 hour later, second plane leaves flying in the ... A: Since only half an hour has passed, the one flying at 500 mph is only 500/2 = 250 miles ahead. ... | |
| Probability Word problem | 10/22/2009 |
| Q: If you can help with this problem also, it would be greatly appreciated. I have been banging my head ... A: Let G=goalie, B=back, M=midfielder, and F=forward. The soccer team has 16 members. Now to go ... | |
| Algebra i | 10/22/2009 |
| Q: An alloy containing 30% gold is mixed with a 60% gold alloy to get 300 kilograms of an alloy that is ... A: If N kilograms of alloy 1 were used, then 300-N kilograms of ally 2 were used. Using this, there ... | |
| algebra 1-b | 10/22/2009 |
| Q: Sally wants to buy some accessories for her hair. She can buy two scrunchies and four barrettes for ... A: Let S be the scrunchies and B be the batteries. We are given that 2S + 4B = $12.50 and that S + 6B ... | |
| word problem | 10/21/2009 |
| Q: please bear with me, i' a slow typist M is 8 more than a second number. which of the following ... A: B, since M is 8 more, the second number is M-8. 1) If you had 5 and you had one more than your ... | |
| welding/math | 10/20/2009 |
| Q: A tensile test was performed on a 0.505 inch diameter standard tensile bar machined from a weld ... A: If the diameter of the bar was d = 0.505, the radius is r = 0.505/2 = .2525. This makes the area = ... | |
| Math Word problem | 10/19/2009 |
| Q: Help please. Problem = A five digit number with 5 different digits. Place a 2 in front of number to ... A: I thought about how to do this, and then decided to let the computer figure it out. I wrote a quick ... | |
| Math | 10/19/2009 |
| Q: As Hybrid car sales rise in the united states, automobile manufactures are expected to increase the ... A: A linear equation since 2000 is to be found. The two years gives are 2015 and 2006, and they have a ... | |
| time problem in algebra | 10/17/2009 |
| Q: At what time between 3 to 4 o'clock will be the hands of the clock be together. Please help me to ... A: The hands on a clock depend on the time. There are (360/12)° per hour, so 30° per hour. There are ... | |
| word problems college algebra | 10/15/2009 |
| Q: question 1. the speed of sound is 760 mph in air. a gun is fired 1/2 mile from you. how long will ... A: question 1. the speed of sound is 760 mph in air. a gun is fired 1/2 mile from you. how long will ... | |
| Mixture/Motion | 10/15/2009 |
| Q: I've been asked to create a chart, write an equation and to solve problem: At a spring concert, ... A: The equation would be given S = the number of student tickets and A = the number of adult tickets, ... | |
| math | 10/14/2009 |
| Q: how do i find the hypotenuse and leg of a right triangle when one leg is 4 in.? A: When the legs are A and B, and the hypoteneuse is C, A² + B² = C². In this case, we have A = 4, so ... | |
| Word math problem? | 10/13/2009 |
| Q: The wildcat was chasing a jackrabbit, which was 60 leaps ahead. The cat took six leaps to the ... A: The cat leaps 2/3 as often, but in each leap, goes 7/3 as far. If the cat take 6 leaps, the rabbit ... | |
| quantitative methods in planning(linear programing | 10/12/2009 |
| Q: The Star Heights Developer Company owns 800 acres of prime, but undeveloped, land on a scenic lake ... A: This is a linear programming problem. The variables are s, d, t, and r for, respectively, single, ... | |
| word problem with inequalities | 10/8/2009 |
| Q: a car rental company offers two plans. Plan a charges $32 per day with unlimited mileage, and plan b ... A: The equation is 32 = 24 + 0.15m, where m is miles. That solves by first subtracting 24 from both ... | |
| math word problem terms | 10/8/2009 |
| Q: In the following problem, which I used from the AllExperts website the actual units (days in part 1, ... A: Yes, the answer is correct if the person only walks at 1/2 mile per hour, but that's some pretty ... | |
| Word problems | 10/8/2009 |
| Q: Old Mac Donald raises ducks and cows.The animals have a total of 32 heads and 72 feet. How many ... A: Ducks have 2 feet and 1 head. Cows have 4 feet and 1 head. If we take D as ducks and C as cows, the ... | |
| inequalities | 10/8/2009 |
| Q: Laura sells candies half a dollar each. How many candies must she sell to make a profit of at least ... A: Assuming the half a dollar is profit for her, since it gives no cost, we need to see how many half ... | |
| story problem | 10/7/2009 |
| Q: My guess: P=(10/1000)(18/20) because its probability any species will invade X probability that an ... A: Of the invasive, 18 had high fecundity, 2 did not. Ot those not invasive, only 3 had high fecundity ... | |
| word problem / inequalites | 10/7/2009 |
| Q: A publisher has orders for 600 copies of a certain text from SanFranciso and 400 copies from ... A: Since Sacramento needs 400, and Lodi has 'em cheaper that the other place, ship 'em from Lodi to ... | |
| possible combinations | 10/6/2009 |
| Q: I have a lock with 4 number spots. I was told the combination is a combination of either 0's %26 ... A: From what I understand, there are 4 spots that can have a 0, 1, or 2. That's 3 choices for each ... | |
| scale factor | 10/6/2009 |
| Q: If a rectangle has an area of 4 and is enlarged by a scale factor of 4, then the enlarged rectangle ... A: If a rectangle has area A1 = 4 and is enlarged by a scale factor of 4, that means the length L and ... | |
| Scale Factor | 10/6/2009 |
| Q: A rectangle has area of 30 square feet. A similar rectangle has area of 270 square feet. What is the ... A: The problem gives us the area is 30, and if the triangle has base x and length y, then xy = 30. The ... | |
| math | 10/6/2009 |
| Q: Eggs are bought at Rs 15 a dozen and sold at Rs 2.50 per egg.What is the selling price per dozen ... A: There is a problem with the units. The buying price is per dozen and the selling price is per egg. ... | |
| Mathematical Expression | 10/5/2009 |
| Q: How can a situation be reduced to or expressed as the following: $1.50, per person, per day? Would ... A: (1) $150 per ? person(s) for 10 days If ? was known, $150/? would be the price for one person for 10 ... | |
| Mathematical Expression | 10/5/2009 |
| Q: How can a situation be reduced to or expressed as the following: $1.50, per person, per day? Would ... A: Yes, it is. I think that problem was trying confuse you in there being ten of each. For example, ... | |
| word problem | 10/5/2009 |
| Q: A cellular phone company currently has three towers: one in Tampa, one in Orlando, and one in ... A: Now laying the line would probably have cost due to who's land you were crossing, so it might be ... | |
| Trains | 10/5/2009 |
| Q: Two persons walk along the train tracks at a constant speed. The train reaches the first person and ... A: Since there first train past the person in 10 seconds. The second train the person 20 minutes later ... | |
| algebra word problem | 10/5/2009 |
| Q: George and Donna drive by car for 5 hours and travel 258 miles. George drives at 53 mph and Donna ... A: Let the pages read be P. The number not read is 193 - P. One 4th of that number is (193-P)/4. The ... | |
| Mathematical Expression | 10/4/2009 |
| Q: How can a situation be reduced to or expressed as the following: $1.50, per person, per day? Would ... A: The price is $1.50 per person, per day. This is $15.00 for 10 people, per day. For 10 days, it is ... | |
| algebra word problem | 10/4/2009 |
| Q: George and Donna drive by car for 5 hours and travel 258 miles. George drives at 53 mph and Donna ... A: Remember the basic equation distance = rate * time, or d = rt. Note that if they had 250 miles to ... | |
| linear equations with two variables word problem | 10/3/2009 |
| Q: A boat rows to a place 4.8 miles with the stream and back in 14 hours, but finds that he can row 14 ... A: First, we know that distance d is equal to rate r times time t, so d = rt. This means that to go ... | |
| Football word problem | 10/2/2009 |
| Q: one day, fred the football player decided to do a little math activity. he put his ball down on the ... A: When he had not yet moved the ball, it was at 100 yards. Since there are 36 inches per yard, that is ... | |
| algebra word problem | 9/30/2009 |
| Q: Two machines are packing spaghetti into boxes. The smaller machine can package 400 boxes per hour ... A: m @ 400/hr, M @ 600/hr, M on for 2 hours prior to m When m is turned on, M has been on for 2 hours ... | |
| Algebra Word Problem | 9/30/2009 |
| Q: Jonah sells popcorn and peanuts at the game. Each bag of popcorn costs $1.50 and each bag of peanuts ... A: Since both start with P, let C = popCorn and N = peaNuts. It is known that C + N = 300, so C = 300 ... | |
| Linear Word Problems | 9/30/2009 |
| Q: For delivering packages, the Cross Town Courier Service charges a set amount for the first 50g and a ... A: Take the larger, 330g, minus the smaller, 210g and get 120g. Take the larger price, %7.40, minus ... | |
| geometry | 9/29/2009 |
| Q: During an election campaign, a candidate gave away 5000 little advertisments.The pens he gave away ... A: Let P be the number of pens and S be the numbers of stickers. The total is 5,000, so P + S = 5,000. ... | |
| Setting up equations for given situations | 9/28/2009 |
| Q: When getting into shape by exercising, the subject's maximum recommended number of heartbeats per ... A: The first thing it says is to subtract the age a from 220. Doing so would mean that we need 220 - a ... | |
| Matrices- Linear Equations | 9/28/2009 |
| Q: I have been banging my head against the wall on this one. I cam across this question in my Math ... A: Let Q = # of quarters, L = # of loonies, and T = # of toonies. Since she has 53 coins, we can say ... | |
| Word problems using systems of equations | 9/28/2009 |
| Q: Rohando has 1.15 in dimes and nickels. The number of nickles is 5 less than twice the number of ... A: D = the number of dimes. It is also said 2D-5 = the number of nickels. The value of the is 0.10D + ... | |
| ap calculus | 9/27/2009 |
| Q: My Problems (set 1): 6. In exercise 6, find the natural domain of the given function: f(x)=1/(5x+7). ... A: 6. All but where 5x+7=0 => 5x = -7 => x = -7/5. 7. The domain is where |x| >= rt(3). 12. The ... | |
| Word Problem | 9/25/2009 |
| Q: Two kids need to sell candy bars. The 1st customer buys 1/2 the entire stock and 1/2 bar. The next ... A: They had 8 left, and 1 was eaten, so there were 9 left. If half the amount plus 1/2 a bar was given ... | |
| word problems | 9/25/2009 |
| Q: If a car needs its oil changed every 3500 miles and its tires rotated every 6000 miles and she just ... A: Find what number goes into both. Note that 3500=35*100 and 6000 = 60*100. However, it can be seen ... | |
| the 1,000 locker problem | 9/24/2009 |
| Q: There are 1000 lockers and 1000 mischievous students. Student 1 opens all the lockers student opens ... A: Student A (student 1): opens all B (student 2): opens even numbered C (student 3): reverses each 3rd ... | |
| word problem | 9/23/2009 |
| Q: A bus seats 51 people and a van seats 8. With 150 students in 8 vehicles, how many buses and vans ... A: Let the number of busses be B and the vans be V. The equations to look at are 51B + 8V = 150 and ... | |
| Math 111 WordProblem | 9/22/2009 |
| Q: A group of hikers from Tulsa hiked down into the Grand Canyon in 3 hours and 30 minutes. Coming back ... A: I made a silly mistake and forgot to bring down the difference. The real equations are D1 = R1•T1 ... | |
| Math 111 WordProblem | 9/21/2009 |
| Q: A group of hikers from Tulsa hiked down into the Grand Canyon in 3 hours and 30 minutes. Coming back ... A: Let distance = D, rate = R, and time = T, and it is known that D = R•T. I will remember that as D = ... | |
| Word problems | 9/16/2009 |
| Q: How much of 10 gallons of a 30% antifreeze rich coolant has to be drained and replaced by a 70% rich ... A: Say the amount added is x gallons, so the amount of antifreeze would be 70%, or 0.7x. In order to ... | |
| applications | 9/16/2009 |
| Q: sang invested some money at 10% interest. sang also invested $90 more than 4 times that ammount at ... A: The first investment is x and the interest rate is 10%, so the interest is 0.1x. The second amount ... | |
| Problem solving using inequalities. | 9/15/2009 |
| Q: The usuall toll charge to use the Bingham tunnel is 50 cents. If you purchase a special sticker for ... A: The question is, 'Since the charge is $5.50 and the difference is 15c, find the number of times.' ... | |
| math word problem | 9/15/2009 |
| Q: Bill & Jeremy both collect model cars. Bill has 3 times as many as Jeremy. Together they had 64 ... A: Let B = number of cars owned by Bill, J = number of cars owned by Jeremy. B collects 3 times as ... | |
| Gravity | 9/14/2009 |
| Q: Jennifer serves the volleyball to holly with upward veloctiy or 21ft/s. The ball is 4ft above the ... A: I will assume that she should strike it somewhere between 2 to 4 ft off the ground. The equation for ... | |
| precalculus word problem | 9/13/2009 |
| Q: Suppose you would like to make a rectangular storage container with a top to store your beloved math ... A: The variables are L = length, W = width, and H = height. One of the variables can quickly be ... | |
| math question | 9/12/2009 |
| Q: I was wondering how many possible unique combinations(order does not matter here) for four possible ... A: Each condition has 2 choices. There are 4 conditions. The answer would be 4's multiplied together, ... | |
| Maths | 9/11/2009 |
| Q: A woman is 4 years older than her daughter. Six years ago the product of their ages was 136. Find ... A: Woman's age is W, daughter's age is D. We are given that W=4D and (W-6)(D-6)=136. Putting D=W/4 ... | |
| college algebra word problem | 9/11/2009 |
| Q: the parking cost at the local airport (in dollars) is C=2+1.75(h-1), where h is the number of hours ... A: Note that C(h) = 2 + 1.75h - 1.75 = 0.25 + 1.75h = (1+7h)/4. Since C(h) = (1+7h)/4, let C(h) be 37 ... | |
| Math 11 canadian sorry lol !!! | 9/11/2009 |
| Q: need to know the formula for finding the time in days if a deposit is 3,580 the rate is 4.5%and the ... A: I kept the numbers out to as many decimals as possible in Excel, but only printed up to five digits ... | |
| algebra 3 4 | 9/10/2009 |
| Q: A woman is standing 12 feet from a lamp post that is 18 feet tall. How long is the woman's shadow? ... A: It depends on the height of the woman. Since it is not given, lets assume she was 5' tall. There ... | |
| math word problem | 9/9/2009 |
| Q: A farmer has an orchard with five apple trees, five peach trees, five pear trees, five apricot ... A: They are to be planted in a 5x5 block. In row one, make them apple, peach, pear, apricot, and plum. ... | |
| college algebra | 9/9/2009 |
| Q: An investor has $5000 to invest for a period of 1 year. Find the range of per annum simple interest ... A: To find interest rate, take (100(interest)/(original amount))%. That means to calculate ... | |
| word problem | 9/9/2009 |
| Q: a racecar is scaled so that 1 inch on the model car equal 6 1/4 feet. if the model is 2/3 inches ... A: Since 1 inch is that same as 6 1/4, lets convert that number to 4ths. 6 is 24/4, and if 1/4 is added ... | |
| College algebra prep | 9/8/2009 |
| Q: A farmer wishes to enclose a rectangular region with 210 m of fencing in such a way that the length ... A: Let L = length of the field and W = width of the field. Next, note that there will be two fences of ... | |
| quadratic equations | 9/8/2009 |
| Q: a bag has 20 coins all 10c or 50c the value of the coins in the bag is 7.60 find how many of each ... A: The coins with a 10c value I will call D for dimes. The coins with a 50c value I will call H for ... | |
Word Problems
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Scott A Wilson
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Story problems with any relation to math.
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I started doing story problems in grade school and have been helping people ever since.
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