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	The discriminant		2010-01-17
		Sonjonnia pose la question : What is the value of the discriminant? 16x^=16x-4 Penny Nom lui répond.
	A push-button padlock		2010-01-17
		Vince pose la question : Hi, I have a push-button padlock using ten buttons (1-2-3-4-5-6-7-8-9-0). Five digits must be pushed in order to open the lock. Each digit can only be used once. Order is not supposed to matter. How many different possible combinations? And what are they? Harley Weston lui répond.
	A linear equation with the variable on both sides		2010-01-16
		dog pose la question : 4x-9=7x+12 Penny Nom lui répond.
	Cubic feet		2010-01-16
		deb pose la question : 1 room 49x24 1 room 18x18 need 6 inch deep can u convert to cubic feet for me thank you Penny Nom lui répond.
	The adjacency matrix of an undirected graph		2010-01-15
		Bhavya pose la question : Let Cn be the undirected graph with vertex set V = {1,2,3,...,n} and edge set E = {(1,2), (2,3), (3,4),.... , (n-1,n), (n,1)}. Let An be the adjacency matrix of Cn. a. Find the determinant of An. b. Find (An)^2 Robert Dawson lui répond.
	Probability, counting and cards		2010-01-15
		Julie pose la question : Hello, Select a card from the deck(card deck of 52 cards). Place the card back in the deck. What is the probability that both cards will be black? Is it 25/104, 24%? Select a card from the deck. Do not replace the card. Select another card. What is the probability that a red and a face card are the two cards you selected? Is it 2/221, .9%? Remove the red cards from the deck and assume that the remaining cards have been shuffled: select a card from the remaining deck. Place the card back in the deck. Select another card. What is the probability that both cards will be black? Is it 26/26 x 26/26= 1 x 1 = 1 , 100%? Select a card from the remaining deck. Do not replace the card. Select another card. What is the probability that a red 3 and a face card are the 2 cards you selected? Is it 0/26 x 6/26 = 0, 0%? Seperate 12 face cards from the rest of the deck. Assume that the face cards have been shsuffled. Select 3 cards from the pile of face cards. How many different arrangements can be made by selecting 1 of each card (jack, king, queen) from the pile? is it 1/4 x 1/4 x 1/4 x 1/4 = 1/64? How many different ways are there of selecting the queen of clubs, then the king of diamonds, and then the jack of hearts from the pile? Is it 1/12 x 1/12 x 1/12 = 1/1728? Robert Dawson lui répond.
	soustraction		2010-01-14
		LUCAS pose la question : comment faire l'operation suivant car je ne me souvient plus tres bien D'avance merci 4h44mn53s-2h52mn45s Pierre-Louis Gagnon et Claude Tardif lui répond.
	A schedule for a pool tournament		2010-01-14
		john pose la question : I need to know how to set up a pool tournament 12-14 players playing once a week, either 10-12 weeks whichever works out the best, what players would play what players week one through week ten or twelve? I hope you can help, I cant figure out the formula. thanks John Victoria West lui répond.
	A circular photo in an octagonal frame		2010-01-13
		Mike pose la question : I have a circle photo 18 and one quarter inches round. I want to cut frame for it in a octagon shape. What would the angle and the length of cut be? Mike Robert Dawson lui répond.
	A triangular prism		2010-01-13
		Breon pose la question : what is the formula for a triangular prism? Robert Dawson lui répond.
	Trigonometry and picture hanging		2010-01-13
		george pose la question : The top of a picture 1m high 0.8m from the ceiling. At a point on the ceiling directly in front of the picture, we wish to install a light so that the angle subtended by the picture equals to the angle of depression of the top of the picture. How far out from the wall should the light be installed? Penny Nom lui répond.
	Mixed numbers		2010-01-13
		Linh pose la question : Perform the indicated operations: 6 1/4 + (- 2/3) x 1 1/2 Penny Nom lui répond.
	What percentage am I reducing it by?		2010-01-13
		Lynda pose la question : I need to calculate the percentage of a total number. If my total is 2.9 million and I take out 187,000 what percentage am I reduing it by? Penny Nom lui répond.
	Related Rates Problem		2010-01-12
		Neven pose la question : A woman raises a bucket of cement to a platform 40 ft above her head by means of a rope 80 ft long that passes over a pulley on the platform. If she holds her end of the rope firmly at head level and walks away at 5ft/s, how fast is the bucket rising when she is 30 ft away from the spot directly below the pulley? (G. F. Simmons, Calculus with Analytic Geometry, pg.142) Penny Nom lui répond.
	A proof by induction		2010-01-12
		Bhavya pose la question : Prove by induction that if Xi >= 0 for all i, then (Summation Xi from 1 to n)^2 >= Summation Xi^2 from 1 to n Penny Nom lui répond.

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