| Subject | Date Asked | Expert |
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| Word problems/ Algebra | 7/16/2008 | Abe Mantell |
Q: I am having difficulty creating the formula to solve word problems. For example:A traveling club ...
A: Let x=the number of people initially in the club. Thus, the initial cost per person is $150,000/x, ...
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| Math Word Problem finding current | 7/15/2008 | Abe Mantell |
Q: A motoboat heads upstream a distance of 12 miles on a river whose current is running at 5 miles per ...
A: Let x=the speed of the boat relative to the water. Thus, the actual speed upstream is x-5 miles/hr, ...
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| math | 7/12/2008 | Abe Mantell |
Q: melinda has 3pairs of red socks,2 pairs of black socks and 5 pairs of white socks . how many minimum ...
A: Are you sure you mean what is the "minimum" # that can be removed? Also, I gather she needs to be ...
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| how do i covert in the metric system | 7/11/2008 | Abe Mantell |
Q: I'm having a test monday and I'm having trouble converting.
A: The easiest way to do any conversions is to use what are called "unit fractions." That is, you ...
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| Help Solve | 7/7/2008 | Abe Mantell |
Q: 1.If you earned an average of $25,000 over your working life you retire after 2005 at 62, 63, or 64, ...
A: OOPS! Sorry, disregard my previous reply to this! OK... 1. Let x=age, y=SS benefit. Thus, ...
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| Help Solve | 7/6/2008 | Abe Mantell |
Q: After 2 minutes on a treadmill, Jenny has a heart rate of 82. After 3 minutes she has a heart rate ...
A: Let x=the time (in minutes), y=heart rate. Thus, we get the two ordered pairs: (2,82) & (3,86) ...
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| please tell me how to do it as soon as possible | 7/5/2008 | Abe Mantell |
Q: A salesman drove to portland a distance of 300 miles. during the last 80 miles of his trip heavy ...
A: Let x=the original speed (in miles/hr), thus x-15=the speed during the last 80 miles. Let t=the time ...
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| problem solving | 7/2/2008 | Abe Mantell |
Q: The midpoints of the sides of a square of side 1 inch are joined to form a new square. This ...
A: Clearly, the area of the first square is 1^1 ==> A1=1 The second square has sides sqrt(2)/2, so its ...
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| sine and cosine word problem | 5/23/2008 | Abe Mantell |
Q: Two sailboats leave a harbor in the Bahamas at the same time. The first sails at 22mph in a ...
A: After 5 hrs, the distance they have traveled is: The 22 MPH boat: 110 miles The 29 MPH boat: 145 ...
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| Would you help us with this, please. | 3/11/2008 | Qaiser Khan |
Q: I am hoping you will read this math problem and tell us what you come up with and how, I won't give ...
A: if you are familiar with factorials then you would know the answer is 3! = 3 x 2 x 1 = 6 ways if ...
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| word problem | 3/9/2008 | Soroban |
Q: The hypotenuse of a right triangle has a length of 13 cm. The sum of the lengths of the two legs is ...
A: Anan! >> How did a^2 + (17-b)^2 = 169 become (2a)^2 - 34a + 120 = 0 ? I typed it wrong . . . ...
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| How many EGGS? | 3/8/2008 | Soroban |
Q: An old lady had a vast Quantity of eggs to sell, when asked how many she said if you divide the ...
A: Larry! This is a messy one! It requires some special techniques. Lucky for both of us, I know ...
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| Math | 3/5/2008 | Soroban |
Q: The zoo is ordering bird seed. The keeper of the bird cages knows that two crested cockatoos wil eat ...
A: Michael! >> The zoo is ordering bird seed. >> Two cockatoos eat 2 pounds of birdseed every two ...
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| Inequality word problem | 3/4/2008 | Soroban |
Q: Can you help me to set an inequality to the following: Two liters of an acid of concentration ...
A: Stephanie! This is a tricky one . . . We have 3 liters which is 30% acid. It contains: ...
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| matrix word problem | 3/2/2008 | Soroban |
Q: How do i set up the equations to solve this problem using matrices? You can purchase peanuts for $3 ...
A: Ashley! Let P = pounds of peanuts A = pounds of almonds C = pounds of cashews The mixture ...
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| Heading of a Boat | 3/2/2008 | Soroban |
Q: here is another tough one. (Tough for me at least) A person who can row 2.6 mph in still water ...
A: Richard! We need a diagram. Draw a horizontal line. Label the left end "A", the right end "B". ...
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| ? | 2/27/2008 | Soroban |
Q: (If I already asked you his the other day I aplogize - my internet is sporadic!) I have a set of ...
A: Ali! >> I have a set of 40 separate objects which can be organized in a consecutive >> random ...
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| Matrices word problem | 2/27/2008 | Soroban |
Q: An investment banker wishes to invest 150,000 in US and German Stocks and Bonds. Stocks are not as ...
A: Klee! You have a very good start on this problem . . . >> A banker wishes to invest 150,000 in US ...
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| Algebra Word Problem using AT MOST | 2/27/2008 | Soroban |
Q: You have $19 dollars to buy pink and violet stickers. The pink stickers cost $2.20 per sticker and ...
A: Olivia! Let x = number of pink stickers. Let y = number of violet stickers. The pinks cost $2.20 ...
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| word problem involving fraction | 2/27/2008 | Soroban |
Q: A used car dealer will make a profit on the sale of a car if the cost of the new car is less than ...
A: Stacey! This takes a bit of Algebra . . . We're told: [Cost] < 3/4 x [Selling Price] We are ...
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| help with math word problom | 2/26/2008 | Soroban |
Q: Find the length of the diagonal of a rectangle with a length of 16 inches and a width of 7 inches
A: Joachim! Make a sketch. The length of the rectangle is 16 inches, its width is 7 inches. Draw a ...
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| Word Problem | 2/26/2008 | Soroban |
Q: A 10-Quart radiator has 30% antifreeze. How much of the fluid should be drained and replaced with ...
A: Michelle! This one is trickier than the usual "Mixture Problem." We will consider the amount of ...
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| Inequality Word Problem | 2/26/2008 | Soroban |
Q: A manufacturer of solar heaters finds that when x units are made and sold, the profit (in thousands ...
A: Michelle! We have: P = x² - 50x - 5000 This is an up-opening parabola, shaped like "U". Profit ...
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| word problem help | 2/22/2008 | Soroban |
Q: Cost of Paint. The first coat of paint for the outside of a building requires 1L of paint for each ...
A: Sherrie! We just have to "walk" through this problem. There are two walls that are 20 m long and ...
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| Related Rates problem... | 2/21/2008 | Soroban |
Q: A lighthouse is at point A, 5km North offshpre from the nearest point O of a straight beach. A store ...
A: Kim! This is a classic problem, found in every Calculus book. By the way, it's not "related ...
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| Alegebra Word Problem | 2/21/2008 | Soroban |
Q: find 3 consecutive odd integers such that five times the 1st increased by the second is equal to ...
A: Suncerae! Consecutive odd integers "go up by 2's". Let x = first odd integer x + 2 = second ...
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| Geometry: Pizza Prices | 2/21/2008 | Soroban |
Q: The Pizza Palace has started to make square pizzas. This sounds good to Myra, who wants her family ...
A: Liwie! I think Sam is wrong . . . Mondo's 12-inch round pizza has about 113 square inches. ...
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| algebra | 2/21/2008 | Soroban |
Q: My son has a problem that he is not sure how to work. It is: The distance an object falls is ...
A: Cyndi! "Distance is proportional to the square of the time." This means: d = kt² (where k is ...
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| Table Talk | 2/19/2008 | Soroban |
Q: The Mayberry's circular table has an area of 1256 square inches. The table opens in the middle to ...
A: Stephanie! We must take the given information and work backwards . . . The table has radius R. ...
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| math | 2/19/2008 | Soroban |
Q: if i have the area of a triangle how do i find the base and height?
A: Mia! Without more information, we can NOT find the base and height. There is an infinite number ...
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| Algebra | 2/18/2008 | Soroban |
Q: Casey can travel 8 miles upstream in the same time it takes her to go 12 miles downstream. Her boat ...
A: ShaKelly! We will use: [Time] = [Distance] / [Speed] Let x = speed of current (miles per ...
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| rate of speed in water | 2/16/2008 | Soroban |
Q: A speedboat takes 1 hour longer to go 24 miles up a river than to return. If the boat cruises at 10 ...
A: Melissa! Here's my approach to upstream-downstream problems . . . We'll use: [Distance] = ...
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| Please Help! | 2/16/2008 | Soroban |
Q: If Abby leaves home at 8am and is traveling 55 mph. Two hours later, her mom follows her traveling ...
A: Aris! Abby travels at 55 mph and has a two-hour headstart. She is already 110 miles away. ...
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| algebra systems of equations word problem | 2/15/2008 | Soroban |
Q: My daughter is having difficulty with system of equations word problems like this: The ten's digit ...
A: Lili! These can be tricky if you don't understand how two-digit numbers are constructed. Let ...
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| multi step word problem | 2/14/2008 | Soroban |
Q: Please help me set up the equation to solve the following Algebra word problem: A Pager Company ...
A: Nicole! Let x = number of months. Plan A costs: 25 + 6.50x dollars Plan B costs: 8x dollars ...
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| word problem | 2/14/2008 | Soroban |
Q: the toll to a bridge is $3.00. A three-month pass cost $7.50 and reduces the toll to $0.50. a six ...
A: Juan! Let x = number of crossings in a 3-month period. Plan A: each crossing costs $3. ...
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| Remedial College Math | 2/13/2008 | Soroban |
Q: I can't seem to figure out how to start. A chemist mixed some 15% peroxide solution with some ...
A: Stacy! These "mixture problems" drove me crazy until I learned to organize the information. We ...
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| Algebra 2 | 2/13/2008 | Soroban |
Q: At a chinese dinner party, there was a dish of rice for every 3 guests, a dish of broth for every 4 ...
A: Olivia! Let N = number of guests. Rice was served to every 3rd guest. There were: N/3 dishes ...
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| Math | 2/12/2008 | Soroban |
Q: Suppose that a large pump can empty a swimming pool in 50 hrs and that a small pump can empty the ...
A: Angela! I have a favorite approach to these "Work" problems. I hope you like it. Pump A takes ...
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| word problem | 2/11/2008 | Soroban |
Q: I am not sure how to solve this, I am trying to help my 5th grader with math and its been a long ...
A: Ann! The tricky part is translating Words into Math. Let X = length of one piece. The other is "2 ...
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