Voici les articles les plus récents de notre base de données:
nouvelle recherche

		Page 639/886

	A 3 by 3 block on a calendar		2006-01-18
		A student pose la question : Choose two different blocks of nine numbers arranged 3 across and 3 down on a calendar, and check that this rule holds: For any block of nine numbers the average of the four corner numbers is equal to the middle number. Show your work and explain why the rule works. Penny Nom lui répond.
	I need to order sand for playgrounds		2006-01-18
		Jody pose la question : I need to order sand for playgrounds. I have their square footage and the various depths of sand needed for each, but sand comes in tons. What is the formula for converting square footage and depth to tons (for example: 6 inches of sand needed for a 200sq ft area = how many tons?) Penny Nom lui répond.
	The centroid of a triangle		2006-01-18
		Andrea pose la question : I am trying to find the centriod of a triangle. I have been given the three vertices of the triangle: A (-25, -20), B (-5, -40), and C (15, 30). I believe I calculated the correct midpoints: AB(E) (-5, 5), BC(D) (5, -5), and AC(F) (-15, -30). When I graphed these points I came up with the solution (-5, -10), but I can't seem to write the answer out (equations of the lines, etc) correctly. Any help would be greatly appreciated! Penny Nom lui répond.
	What are math arrays?		2006-01-18
		Jeff pose la question : What are math arrays? Penny Nom lui répond.
	Interior and external angles of a polygon		2006-01-17
		Anthony pose la question : In a regular polygon, the ratio of the interior angles to the exterior angles is 3:1. (a) Find the measure of the interior angle. (b) How many sides are there Penny Nom lui répond.
	A sequence of circles and tangents		2006-01-16
		Paul pose la question : Consider a circle whose center is (2,2) and whose radius is 1, and the straight line that goes through the origin and that is tangent to this circle so that the intersection between them is as shown in the attached picture. With this new point we make a new circle whose radius is half of the first one, and we calculate the corresponding intersection point with the same suppositions as in the first case. We repeat the process to the infinite. Find the distance between the center of the circle in the infinite and the origin (point (0,0)). Chris Fisher lui répond.
	The height of a triangle from the lengths of the sides		2006-01-16
		A student pose la question : How do you figure out the height of a triangle when all you have is the length of the sides of the triangle? Claude Tardif lui répond.
	Intercepts and slope		2006-01-15
		Anthony pose la question : Given -1.7x + 0.8y=7.1: (a) state the intercepts and slope for the graph (b) Draw the graph Penny Nom lui répond.
	51 acres		2006-01-15
		A landowner pose la question : i just wanna know how many miles are surrounding my 51 acres? a simple answer will do. thanks:) Penny Nom lui répond.
	Polar to Cartesian coordinates		2006-01-15
		Linden pose la question : How do you convert six units at 30 degrees Polar Coordinate into a Cartesian Coordinate? Penny Nom lui répond.
	Percentage discount		2006-01-15
		Louise pose la question : Avril is buying a computer. She finds two places with a discount."Classy Computing" is selling a computer that was £650 and NOW it has £50 off. "WWW.CHEAPO.COM" is also selling a computer that is £650 but it NOW has 10% off. WHICH IS CHEAPER? Penny Nom lui répond.
	12100 sq ft is how many acres?		2006-01-14
		Sydney pose la question : If there are 12100 Sq. Ft in property what would that be acre wise? Penny Nom lui répond.
	Who is lying?		2006-01-14
		Diane pose la question : A business man was working in his home office when he realized he had left a five-dollar bill in the book he had been reading. He called his butler to bring him the book from the library. When he got the book, the bill was no longer there. He then questioned the maid and the butler. The maid remembered seeing the bill between pages 99 and 100 in a book to the left of a business book. The butler did not recall seeing the bill, but was sure the book was to the right of the business book, because to the left of it there was a statistics book. Who is lying? Penny Nom lui répond.
	Concrete tubes		2006-01-14
		Paul pose la question : I have 15 tubes. Each tube measures 12in.x 48in. I have to fill each one with concrete. How do I figure how many cubic yards of concrete I will need? Penny Nom lui répond.
	What initial velocity is required to double the maximum height		2006-01-14
		A photographer pose la question : A body is thrown into the air with an initial velocity V ft./sec. What initial velocity is required to double the maximum height previously obtained? Penny Nom lui répond.

		Page 639/886