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Trigonometry |
2000-09-02 |
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david pose la question : determine the sum of the angles A,B where 0 <= A , B <= 180 (degrees) sinA + sinB = sqr(3/2) , cosA + cosB = sqr(1/2) Chris Fisher lui répond. |
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How many planes contain a line and a point? |
2000-08-30 |
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Harold pose la question : How many planes contain each line and point? Harley Weston lui répond. |
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Adriana's earnings |
2000-08-28 |
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Adriana pose la question : On Friday Adriana earns half as much as she did on Thursday. On Saturday she earns twice as much as she did on Thursday, if her total for 3 days is $63.00 how much did she earn each day? Penny Nom lui répond. |
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Velocity of a pendulum |
2000-08-28 |
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Mekca pose la question : A pendulum hangs from the ceiling. as the pendulum swings, its distance,d cm, form one wall of the room depends on the number of seconds,t, since it was set in motion. assume that the equation for d as a function of t is: d=80+30cos3.14/3t, t>0. estimate the instantaneous rate of change of d at t=5 by finding the average rates for t=5 to 5.1, t=5 to 5.01, and t=5 to 5.001. Harley Weston lui répond. |
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Solving an equation |
2000-08-26 |
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Patrick pose la question : My question is how would u do a problem like this.......... [2x-37] =15?....u have to solve it for absolute value equations....???? Harley Weston lui répond. |
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Cubic yards and cubic feet |
2000-08-26 |
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Rhonda pose la question : have 2.47 cubic yards. what could the dimensions, in feet, be to equal this? Penny Nom lui répond. |
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Subtracting fractions |
2000-08-26 |
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Sarah Stanczyk pose la question : how is this problem solved?? 3/ x+1 - 5/x ( 3 divided by x +1 subtracted by 5 divided by x) Penny Nom lui répond. |
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The sum of the squares of 13 consecutive positive integers |
2000-08-25 |
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Wallace pose la question : Prove that it is not possible to have the sum of the squares of 13 consecutive positive integers be a square. Harley Weston lui répond. |
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Three points on a line |
2000-08-25 |
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Casey pose la question : I am trying to find the slope and y-intercept of an equation. I have THREE x values and THREE y values. How do you do it? Help! Penny Nom lui répond. |
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Three pattern questions |
2000-08-22 |
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Michael Rodriguez pose la question : I have 3 pattern questions that I need help answering, please. - 6 and 7 = 42
2 and 5 = 10 4 and 8 = 8 5 and 9 = ? - 7 and 5 = 1
9 and 12 = 3 10 and 15 = 5 12 and 16 = ? - 1st = 1
3rd = DEF 10th = * 6th = ? Claude Tardif lui répond. |
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Covering 1, 1/2, 1/3,... |
2000-08-22 |
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Wallace pose la question : Consider the points 1, 1/2, 1/3, ... on the real number line. You are given five small bars, all of length p, which are to be placed on the number line such that all points will be covered. What is the minimum value of p that will allow you to do this? Penny Nom lui répond. |
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Slope |
2000-08-19 |
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John K. DePonte pose la question : My question is to why the variable "m" was chosen to represent the slope of a linear equation. I always told my class to think of "m" for "m"ountain slope. But what is the real reason for this? Penny Nom lui répond. |
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Six typists |
2000-08-19 |
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Paula Duncan pose la question : If it takes a typist 4.5 hours to type 860 words, how many hours would it take 6 typist to do 16800 words? Penny Nom lui répond. |
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Three consecutive odd integers |
2000-08-18 |
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Wallace pose la question : A six-digit integer XYXYXY, where X and Y are digits is equal to five times the product of three consecutive odd integers. Determine these three odd integers. Paul Betts lui répond. |
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Two word problems |
2000-08-16 |
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Bridget pose la question : A whale's head is 72 inches long... its tail is as long as its head plus half the length of its body, and its body is half the entire length. How long is the whale? Also, An author published a book every two years. When the seventh one was published, the sum of the years of publication was 13,804. In what year was the author forst published? Penny Nom lui répond. |
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