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	Trig identities		2007-07-30
		Suzanne pose la question : I'm a UR University Graduate (with High honours!) but not in math: I'm taking GeoTrig, Sk Learning version, and the text is poorly written. But I was flying through the material until I hit the Trig Identities. I just don't get WHY we have them, why we should know them? What good is this "theory". All that "simplying" rarely yeilds a simple-er version! Also, give me advice for how to study them. Thanks Suzanne Harley Weston lui répond.
	Using the chain rule to solve a derivative		2007-07-29
		Charles pose la question : I need to find the derivative fo the following function.   _______________________ \/ ______________   \/ (x - 1) / (x + 2) + 1 Stephen La Rocque lui répond.
	Permutations and combinations		2007-07-29
		Marcy pose la question : I'm having difficulty teaching my students when to use permutations or combinations. Is there a "catchy" way to teach them that will help them to identify when to use permutations and combinations? Penny Nom lui répond.
	Two chords in a circle		2007-07-29
		Jerry pose la question : Points A and C lie on the circumference of a circle. B is a point inside the circle. When produced, AB and CB meet the circumference at points E and D respectively. Prove that AB = CB, then EB = BD. Stephen La Rocque lui répond.
	The odds of winning a contest		2007-07-29
		Kevin pose la question : I have been asked by a customer in Missisauga to track down some odds of winning a contest. In this contest, the last 4 digits of the winner's driver's license number have to match the last 4 digits of a Harley VIN number. There are 200 people maximum allowed into the drawing, 10,000 total possible VIN combos. Would the odds be 1:50 or something other than that? Harley Weston lui répond.
	Building a garage		2007-07-29
		charles pose la question : I want to build a garage that is 24 feet 4 inches wide by 50 feet long. can you please tell me what the length of one corner is to the other? Penny Nom lui répond.
	320 acre lots		2007-07-29
		melisa pose la question : we are splitting a 320 acre parcel into five 35 acre lots with one 145 ace lot. I have the footage of each side there are eight: 5280 x 2640x2640then out1320x1320up x2640back inx1320upx1320this now would meet back to the 5280foot side i know there is a half of a square mile and 320 acres.what would the measurements be in feet for length to make a square or a rectangle to make a 35 acre lot? Harley Weston lui répond.
	A 20,000 gallon fuel bag		2007-07-28
		Kevin pose la question : I have a 20,000 gallon fuel bag Length 32'x Width 29'x Height 4.2'. I need to build a containment around it. If the bag was to rupture the containment would have to hold the 20,000 gallons of fuel plus ten percent. What size would the containment have to be in order to hold the fuel. Stephen La Rocque lui répond.
	Equation of a perpendicular line		2007-07-28
		Marina pose la question : Find the equation, is standard form, with all integers coefficients, of the line perpendicular to x+3y=6 and passing through (-3,5) Stephen La Rocque lui répond.
	A polynomial equation		2007-07-28
		claire pose la question : Hi I sent this question a while ago but I think I put in the wrong email address. So here it goes again.... If 4x^3 - 6x^2 + 1 = (x-2)(x+1)Q(x) +ax+ b where Q(x) is a polynomial, find a and b. Penny Nom lui répond.
	Solve by substitution		2007-07-28
		Marina pose la question : I am stuck with this substition please help. -3x+y=1 5x+2y=-4 Penny Nom lui répond.
	Solve y'' + y = 0		2007-07-28
		Shih-ya pose la question : How do you solve y’’ + y = 0 Stephen La Rocque and Harley Weston lui répond.
	At what speed does Chuck travel?		2007-07-27
		Jessica pose la question : Chuck and Dana agree to meet in Chicage for the weekend. Chuck travels 224 miles in the same time that Dana travels 204 miles. If Chuck's rate of travel is 5 mph more than Dana's, and they travel the same length of time, at what speed does Chuck travel? Harley Weston lui répond.
	A sequence of numbers		2007-07-27
		Shamik pose la question : Question: A sequence of numbers is defined in the following way. B(1) = 1 B(n) = B(n-1) + {Sum of the digits of B(n-1)} for n > 1. B(1) = 1 B(2) = 2 B(3) = 4 B(4) = 8 B(5) = 16 B(6) = 23 B(7) = 28 B(8) = 38 B(9) = 49 ::::::::: and so on ... Is the number 123456789 a term in the given sequence? Shamik Claude Tardif lui répond.
	More on the cardinality of sets		2007-07-27
		Mac pose la question : Can you please help me to find and verify whether the following are finite, countably infinite and uncountable ? Harley Weston lui répond.

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