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Maximize the area of the yard |
2007-02-08 |
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Andy pose la question : I have 60 m to construct a fence adjacent to my house. What are the values of x and y that maximize the area of the yard? Penny Nom lui répond. |
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Chickens and cows |
2007-02-08 |
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Norman pose la question : My grandson is testing me on a question he recently solved.
The question is "A farmer has cows and chickens - there are 252 heads and 81 legs - how many of each animal does he have?"
I immediately thought of the quadratic equations I learned 50 years ago at school, but cannot remember how to do it. It is further complicated by the fact that 1 animal must have 3 legs as the total number of legs is 81 (or perhaps he his trying to catch me out) Any helpful advice would be welcome.
Many thanks Norman Stephen La Rocque and Penny Nom lui répond. |
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Romeo is throwing pebbles |
2007-02-08 |
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Jessie pose la question : Romeo is chucking pebbles gently up to Juliet's window, and he wants the pebbles to hit the window with only a horizontal component of velocity. He is standing at the edge of a rose garden 4.5m below her window and 5.0m from the base of the wall. How fast are the pebbles going when they hit her window? Stephen La Rocque lui répond. |
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BEDMAS solving for X |
2007-02-07 |
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damian pose la question : Hi, I am having a problem understanding why when using BEDMAS the text book example of the following question has used bedmas and reduced the calculation to 4/3.
Text book formula: X/200,000 = (X - 90,000) / 150,000 X = 4/3 * (X - 90,000) X = 360,000
My solution: I always thought that when you do something to one side you do the same to the other. Why would the equation bring the 200,000 / 150,000 down to 4 / 3 I would think it would look something like this. X/200,000 = (X - 90,000) / 150,000 X = 200,000*((X - 90,000) / 150,000) Stephen La Rocque lui répond. |
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Area of a rectangle |
2007-02-07 |
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kyle pose la question : paul has enough material to make a fence 22 feet long. he will use this material to fence of a rectangular section of his yard. the rectangles sides must all be whole numbers. i am having a hard time finding the greatest and the least area that he can enclose his fece Haley Ess lui répond. |
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The interior angles of a parallelogram |
2007-02-07 |
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jenniffeir pose la question : Can a parallelogram have two 45 degree angles and two 75 degree angles? Haley Ess lui répond. |
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An even positive integer cubed minus four times the number |
2007-02-07 |
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Rachael pose la question : I can't figure out the proof or the method to get the proof for this question: any even positive integer cubed minus four times the number is divisible by 48 Haley Ess and Penny Nom lui répond. |
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Write an equation for this |
2007-02-07 |
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BS pose la question : How do you write an equation for this: The difference when 7 less than a number is subtracted from twice the number is 12. And also, what is the number? Penny Nom lui répond. |
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Find the next 3 terms of the sequence |
2007-02-07 |
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rose pose la question : find the next 3 terms of the sequence 2,3,9,23,48,87 Penny Nom lui répond. |
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Cubic yards |
2007-02-06 |
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Mark pose la question : I have a pile of dirt that is 200ft long, 40ft wide, and 25ft high. How do I figure out how many cubic yards? Thanks Mark Penny Nom lui répond. |
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A triangle inscribed in a semicircle |
2007-02-06 |
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Benneth pose la question : Consider a triangle inscribed in a semicircle with a radius of R. What are th possible perimeters for the triagle? And the areas? Penny Nom lui répond. |
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Dividing money unequally |
2007-02-06 |
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Linda pose la question : I have a total of $13,826.48. It is to be divided by 15 kids - 2 of the kids only get half of what the other 13 do - how much do the 13 get and how much does the 2 get? Thanks Haley Ess and Steve La Rocque lui répond. |
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Equations with fractions |
2007-02-06 |
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Juan and Derek pose la question : 3/4-x=1/2 3/4+1/5x+-1/3=4/5x Penny Nom lui répond. |
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income percentages |
2007-02-05 |
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karen pose la question : I would like to know what percent of a bill each person would pay based on the income differences one person makes 78968.00 and the other makes 52000.00 I believe it is 65% and 35%
so if a bill is 120.00 one person pays 78 and the other pays 42 is this correct thanks Stephen La Rocque lui répond. |
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Nickels, dimes and quarters |
2007-02-05 |
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Avinash pose la question : Mary has 48 coins made up of nickels, dimes and quarters with a total value of $5.10. She has 4 more dimes than nickels and quarters combined. How many coins of each kind does she have? Use matrix to solve the system Stephen La Rocque lui répond. |
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