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18 articles trouvés pour ce sujet.

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	La longueur d'une corde		2003-01-22
		Un eleve pose la question : Existe-t-il une formule permettant de calculer la longueur d'une corde quelquonque d'un cercle connaissant uniquement le rayon de celui-ci? Si oui quelle est-elle? Claude Tardif lui répond.
	La longueur des segments formant un triangle		1999-10-05
		Michel Provencher pose la question : Connaissant la longueur des segments formant un triangle,comment détermine-t-on chacun de ses angles si: il S'agit d'un triangle rectangle Sachant que la somme des angles d'un triangle est de 180 degrés et sachant par conséquant qu'un des angle est de 90 degrés (triangle rectangle) il reste donc, 90 degrés à partager entre les 2 angles restant. Si les 2 segments formant l'angle droit sont de même longueur on obtient un angle de 45 degrés pour les angles restant soit 1/2 angle droit ce qui ne me pose évidement aucun problème. Quel relation, S'il y en a une, y a t-il entre la longueur de ces 2 segments et les angles restants. il S'agit d'un triangle quelconque Claude Tardif lui répond.
	The distance between the origin and a moving point on a graph		2017-10-16
		Paulina pose la question : Find the rate of change of the distance between the origin and a moving point on the graph of y=x^2 +1 if dx/dt=2 centimeters per second Penny Nom lui répond.
	Long division with decimals		2017-06-16
		Kenneth pose la question : Hello: Why is it recommended to move the decimal from a divisor when dividing so that the divisor is a whole number? I know how to divide by moving the decimal from the divisor, but I cannot explain the reason. I thank you for your reply. Penny Nom lui répond.
	Two pieces of rope		2016-05-21
		Render pose la question : Fred cuts a 12- inch piece of rope. Then he cuts a second piece of rope that is 3/2 longer than the first piece. Is the second piece shorter or longer than the first piece? Explain. Penny Nom lui répond.
	How many kilometers to a longitudinal degree?		2014-06-19
		cherrielyn pose la question : Assuming that earth is a sphere of radius 6380 km, what is the difference in the latitudes of two cities 270 miles apart positioned on the same meridian? Thank you in advanced po! :) Robert Dawson lui répond.
	Long division		2012-06-07
		Emily pose la question : Simplify the expression using long division (9x^2-41x-6)/(x-4) Penny Nom lui répond.
	Great circle course		2012-01-25
		Hervé pose la question : On the earth, the mathematical formula giving the distance between two points, and the initial course for a boat on the great circle is well known. I need to find the inverse formula, ie knowing an initial position on earth, and the initial course of the boat, and the distance to run on the great circle, the formula gives the final position (longitude and latitude). Robert Dawson lui répond.
	Explaining the factoring for the difference of cubes		2008-01-16
		Bill pose la question : A student asked me where did the "difference of cubes" and "sum of cubes" come from. I did not have an answer for her. She is very bright and understands how they work but wanted to know where they derived from. Any help you can offer would be great. Thanks Stephen La Rocque lui répond.
	Great circles		2007-11-05
		Lindsay pose la question : Does a sphere have only ONE great circle? Explain? Stephen La Rocque lui répond.
	Finding the center of a circle that goes through three given points		2007-09-16
		Gary pose la question : I am given three points represented by their Latitude and Longitude. How do I determine the Latitude and Longitude of the center of a circle through the three given points? The lat/lon of the three points are: A. N 43 degrees 30.251 min. W 96 degrees 45.695 min. B. N 43 degrees 30.006 min. W 96 degrees 45.082 min. C. N 43 degrees 30.719 min. W 96 degrees 45.410 min. Thanks. Stephen La Rocque lui répond.
	Simplifying a quartic rational expression using long division		2007-06-14
		Megan pose la question : x+2/12x^4+17x^3+0x^2+8x-40= Stephen La Rocque and Penny Nom lui répond.
	How many miles are there in 30 furlongs?		2006-07-22
		Jennifer pose la question : If there are 8 furlongs in a mile, how many miles are there in 30 furlongs? Steve La Rocque and Paul Betts lui répond.
	A long distance call		2005-12-05
		A student pose la question : The Small World long distance phone company charges 55cents for the first minute of a long distance call and 23cents for each additional minute. 1. How much would a 10- minute long-distance call cost? 2. If a call costs $4.55. how long did the call last? 3. Write an equation for the total cost, C, of an m-minute long-distance call. Penny Nom lui répond.
	Cubic furlongs		2004-01-11
		A student pose la question : 1 mile=8 furlongs, how many cubic furlongs in a cubic mile? Penny Nom lui répond.
	Some algebra		2002-05-11
		A student pose la question : /x - 2 ^4/x = 8 / = square root sign ^ = 4th root of x also, dividing 2x3 -3 -6x __________ 4 + 2x the 2x3 is 2x to the third Penny Nom lui répond.
	The repetend in repeating decimals		2001-03-21
		Sharon pose la question : What is the name for the bar over the repetend in repeating decimals? Also, what is the name of the long division "house"? Penny Nom lui répond.
	The Earth's Arc		1998-02-06
		Robert Dyck pose la question : How do I find the arc/mile of the earths surface? What is the arc? Harley Weston lui répond.

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