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	Slicing an inverted bowl at various heights		2017-04-30
		Joel pose la question : Find a formula to calculate the circumferences of an inverted bowl at various heights. E.g. Take an inverted bowl with a diameter of "x" cm and a depth / height of "y" cm. How can I calculate the circumferences at distances of various heights above the base? Alternately, what would be the formula to calculate the distance of the line segment resulting from a line which intersects both sides of a parabola in which that line is drawn parallel to the tangent of the vertex of the parabola at any given distance from the vertex? Penny Nom lui répond.
	The inverse of y = x(x - 2)		2016-12-21
		Sasha pose la question : Hello, I recently stumbled upon this question and I haven't been able to figure it out. Why is the inverse of y=x(x-2) not a function? Suggest a domain restriction which would ensure that the inverse is a function. Thank You :) Penny Nom lui répond.
	Inverting fractions and percentage		2013-05-18
		Carlos pose la question : If I calculate the percentage change between two fractions, say, 1/100 and 2/100, I get 100% change. Now, if I flip denominator and numerator, 100/1 and 100/2, and repeat the calculation, I get a 50% change. Why are the percentages different? Thank you very much Penny Nom lui répond.
	Proof of a Unique Solution		2009-07-24
		muele pose la question : Find matrix A such that A is not invertible, and b such that Ax=b has a unique solution Robert J. Dawson lui répond.
	Student who is inverting digits		2008-12-09
		Tammie pose la question : Do you have any strategies for addressing inversion of digits in two digit numbers. For example - The student the teacher is working with will write "14" and the number is 41. She has tried highlighting, practice writing numbers, and hundreds charts and finding patterns. Help! Thank you! Robert Dawson and Victoria West lui répond.
	y = log(x) + x. Solve for x.		2005-08-26
		Alain pose la question : I have the following equation: y = ln(x) + x How do I solve for x? Penny Nom lui répond.
	The inverse of a quintic function		2004-07-22
		A student pose la question : I'm really having trouble finding out the inverse of this quintic equation. F(X)= X5+3X3+1.I know that this quintic has an inverse because it is one to one. But I can't find a method to solve this. Finding the inverse of a quadratic or a cubic equation is a lot easier, but with this quintc I am really lost. I even know how the graph of this equation and its inverse looks like, but I'm not sure if Iam getting the right equation. Please help me out. Penny Nom lui répond.
	If the matrix A is inverible and AB =AC, then B = C		2002-03-27
		Vikki pose la question : i hope you can help i am soooo stuck here goes: a) A= 0 1 B= 1 1 c= 2 5 0 2 3 4 3 4 A,B and c are matrices Evaluate AB and Ac (which I can do) then b) I need to prove that if the matrix A is inverible and AB =AC, then B = C. Why does this not contradict what happened in part a)? Leeanne Boehm lui répond.
	Inverting a function		2001-09-30
		Brandie pose la question : Could you please tell me what is the basic guideline for inverting a function Example: S(R)=2PiRal V(R)=PiR(squared)bl R(V)=? Claude Tardif lui répond.
	Dividing fractions		2000-10-18
		Paula pose la question : Why do you have to change the division sign to a multiplication sign and invert the fraction that follows the division sign in order to get the answer to a division problem when you're working with fractions? Penny Nom lui répond.
	Graphing cube roots		2000-04-27
		Heather Jones pose la question : What do the graphs of cube roots look like? Walter Whiteley lui répond.
	Domain and Range of a Function		1999-11-14
		Michelle Mellott pose la question : How do you find the range of the following function: 2y2/(y2+5y+6)?? I know the domain is x not equalled to -2, -3. How can one easily find the range? Harley Weston lui répond.
	Invert and multiply		1999-08-28
		Debbie Walter pose la question : I have another question please, WHY do we invert and multiply when dividing fractions? I know that's what we do but WHY? What is the reasoning behind it? Penny Nom lui répond.

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