| Subject | Date Asked | Expert |
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| trigometry | 2/10/2010 | Scott A Wilson |
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 ...
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| LUMBER AND CONCRETE | 2/9/2010 | Scott A Wilson |
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 ...
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| Ratios | 2/7/2010 | Scott A Wilson |
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 ...
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| Matrix Equation | 2/7/2010 | Scott A Wilson |
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 = ...
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| Chemistry | 2/6/2010 | Scott A Wilson |
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 ...
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| Chemistry | 2/5/2010 | Scott A Wilson |
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 ...
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| Ratios | 2/4/2010 | Scott A Wilson |
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 ...
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| College Algebra motion problem | 2/3/2010 | Scott A Wilson |
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 ...
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| word problem | 2/2/2010 | Scott A Wilson |
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 ...
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| train speed | 2/1/2010 | Scott A Wilson |
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 ...
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| CHEMISTRY | 1/30/2010 | Scott A Wilson |
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 ...
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| Math Clock problem | 1/29/2010 | Scott A Wilson |
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 ...
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| word problem | 1/28/2010 | Scott A Wilson |
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 ...
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| Algebra - angle problem | 1/27/2010 | Scott A Wilson |
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 ...
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| Physics | 1/27/2010 | Scott A Wilson |
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 ...
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| math | 1/26/2010 | Scott A Wilson |
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" ...
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| Investment Word Problem | 1/24/2010 | Scott A Wilson |
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 ...
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| Mathematics | 1/23/2010 | Scott A Wilson |
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 ...
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| Business consumer & math homework help pleasee | 1/22/2010 | Scott A Wilson |
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, ...
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| Math-Matrices | 1/22/2010 | Scott A Wilson |
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 = ...
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| dividing up money | 1/21/2010 | Scott A Wilson |
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 ...
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| dividing up money | 1/20/2010 | Scott A Wilson |
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. ...
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| gre -fencing problem | 1/20/2010 | Scott A Wilson |
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 ...
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| Data Maagement question | 1/19/2010 | Scott A Wilson |
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 ...
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| Rates | 1/19/2010 | Scott A Wilson |
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 ...
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| Conversions | 1/17/2010 | Scott A Wilson |
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 ...
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| Help with mph to rpm | 1/16/2010 | Scott A Wilson |
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 ...
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| Asked for information. | 1/16/2010 | Scott A Wilson |
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 ...
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| Mathematics | 1/13/2010 | Scott A Wilson |
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, ...
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| Word problem please help | 1/11/2010 | Scott A Wilson |
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 ...
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| Mathematics | 1/10/2010 | Scott A Wilson |
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 + ...
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| Math Algebra | 1/10/2010 | Scott A Wilson |
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 ...
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| Time distance | 1/7/2010 | Scott A Wilson |
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 ...
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| Time distance | 1/6/2010 | Scott A Wilson |
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 ...
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| angle-algebra problems | 1/6/2010 | Abe Mantell |
Q: find the value of x in triangle xyz if m of x =2x, mof y=64 and m of z=2x-16. I have the anwser ...
A: The sum of the interior angles of a triangle must equal 180 degrees. Thus, 2x+64+2x-16=180, now ...
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| proportion problem | 1/5/2010 | Abe Mantell |
Q: Suppose the regular price of item A is $2.00 and the regular price of item B is $2.50. If we sell 2 ...
A: Let a=the sale price of item A, and b=the sale price of item B. If the proportions are the same, we ...
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| matrix word problem | 1/2/2010 | Abe Mantell |
Q: The snack shop makes three mixes of nuts in the following proportion: mix 1: 7 pounds peanuts, 5 ...
A: Let x=# of lbs of Mix 1, y=# of lbs of Mix 2, z=# of lbs of Mix 3 Thus, we can write a linear ...
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| Algebra Square Problem | 12/31/2009 | Abe Mantell |
Q: The Perimeter of a square garden is 12 meters greater than the perimeter of a smaller square garden. ...
A: Let x=the length of one side of the smaller garden, and y=the length of one side of the larger ...
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| mathematics | 12/30/2009 | Abe Mantell |
Q: At 1000AM a gymnastics team began traveling to its district finals meet 200 miles away. The team's ...
A: Team A had a flat tire after 100 miles...which took them (100 miles)/(65 miles/hr) = 20/13 hrs Team ...
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| porfit and loss | 12/24/2009 | Scott A Wilson |
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 ...
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