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Two problems involving reciprocals |
2008-08-10 |
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From Dee: I have a few questions that im have trouble working out...
1. One number is three times another number; if each is increased by 1 the sum of the reciprocals is 10/21. Find the numbers
2.A tank can be filled by 2 pipes together in 6 hours; if the larger pipe alone takes 5 hours less than the smaller to fill the tank, find the time in which each pipe alone would fill the tank Answered by Penny Nom. |
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The volume of a swimming pool |
2008-08-10 |
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From Ron: What is the volume of a swimming pool when its length is 40 ft, width 20ft, the deep end is 10 ft and the shallow end is 3 ft.? Answered by Penny Nom. |
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Solve for y in terms of x |
2008-08-10 |
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From Rosie: Solve equation for y
-4x=12+3y Answered by Penny Nom. |
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A linear function |
2008-08-07 |
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From Warren: What are the conditions of the numerical coefficients of the standard form Ax+By=C in Linear Function?
How will you transform y=square root of 3 x + 1 in standard form Ax+By=C? Answered by Penny Nom. |
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Angles in a regular tetrahedron |
2008-08-07 |
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From Carla: Hi guys,
A regular tetrahedron has all its edges 8cm in length.
Find the angles which an edge makes with the base.
Thanks.
Carla Answered by Penny Nom. |
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1/X-2 + 3/X+3 = 4/X^2+X-6 |
2008-08-06 |
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From Molly: Hi, I'm beginning pre-calc this semester, and for practice over the summer, the teacher has given us a review packet with algebra 2 stuff. Well, I've forgotten most of the fraction stuff on it. Would you please help?
Here's the question:
1/X-2 + 3/X+3 = 4/X^2+X-6 Answered by Penny Nom. |
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Square miles |
2008-08-06 |
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From Koni: I'm trying to figure out the distance our buses travel throughout our district to pick up students for school. How do you figure square miles?
If our district measures 6 1/2 miles wide and 2 3/4 miles deep, what is our total square miles? Answered by Penny Nom. |
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Arc-length and sector-angle |
2008-08-06 |
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From Benson: If chord length, radius are given, How to find the sector angle and arc-length Answered by Janice Cotcher. |
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Cost of pencil is rising every year since 7 years ago |
2008-08-06 |
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From Mari: Cost of pencil is rising every year since 7 years ago. If the cost of
pencil last year was 60 cents which is the sum of the cost from the
last two previous years, what is the cost of the pencil now, the cost
seven years ago. Answered by Penny Nom. |
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The angle between two faces of a pyramid |
2008-08-06 |
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From Carla: A pyramid has its vertex directly above the centre of its square base.
The edges of the base are each 6cm, and the vertical height is 8cm.
Find the angle between 2 adjacent slant faces. Answered by Penny Nom. |
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24 in by 14 in by 14 in in cubic feet |
2008-08-05 |
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From Tom: I have a box that has internal dimensions of: 24in. H x 14in. W x 14in. D.
How many cubic feet is this internal space? Answered by Penny Nom and Victoria West. |
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A cone on the end of a cylider |
2008-08-05 |
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From Jerry: Hi.
I need to make a plastic cone to fit on the end of a cylinder. The only dimension i have is the diameter of the cylinder.
This 553 mm.
I need to find the formulae required and how much material will be required. Answered by Penny Nom. |
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Why can't you divide by zero? |
2008-08-04 |
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From Donna: Why can't you divide by zero? Answered by Chris Fisher. |
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Is zero an even number, an odd number, or neither? |
2008-08-04 |
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From Donna: Is zero an even number, an odd number, or neither? Why? Answered by Victoria West. |
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Choosing 5 numbers from 39 |
2008-08-04 |
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From robert: Hi,
I am sending you the web page where I found the question of 39 numbers and =
5 choices, please see below.
How does they comes up with the 120 combinations?
How can I comes up with the 120 combinations in a printout form?
Please read all the way to the bottom of there example and see where they talks about the 120 combinations. Answered by Victoria West and Harley Weston. |
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