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Divide a circle into eleven parts |
2005-11-07 |
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From Dean:
I would like to know how to divide a circle into eleven parts using only four lines.
Answered by Claude Tardif. |
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3x - 5 - (4x - 8) = 2(2 - 3x) + 29 |
2005-11-06 |
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From Emma:
I do not get how to "solve for x". For example:
3x - 5 - (4x - 8) = 2(2 - 3x) + 29
Answered by Penny Nom. |
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Cubic yards of concrete |
2005-11-06 |
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From Cyndi:
I have a carport that is 20' x 31' and a driveway that is 12' x 18' that requires a 3" depth of concrete.
I need to now how many cubic yard it will need to complete these two areas.
Answered by Penny. |
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Equidistant from the points (2,-1,1) and (0,1,3) |
2005-11-06 |
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From Roy:
Find the point on the y-axis that is equidistant from the points (2,-1,1) and (0,1,3).
Find the point not on the y-axis that is equidistant from the points (2,-1,1) and (0,1,3).
Answered by Penny Nom and Walter Whiteley. |
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A block pyramid |
2005-11-05 |
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From Kyle:
if i make a block pyramid and it puts a new perimeter around it every time, for example the first layer will be 1 block across (area=1), the second layer will be 3 blocks across (area=9), the third layer will be 5 blocks across (area=15),etc. The normal block pyramid. I have figured out that in order to figure out the number of blocks needed for a certain level, the equation is (2x-1)2 or (2x-1)(2x-1), where x is equal to the level. For example, on the fourth level, the equation tells you that it will have an area of 49. How would i make an equation for the total number of blocks up to the level. For example, in order to complete 1 level you need 1 block, for 2 levels you need 10 blocks, for three levels you need 35 blocks, and for 4 levels you need 84 blocks.
Answered by Penny Nom. |
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7000 sq feet = ? acres ??? |
2005-11-05 |
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From Victor:
7000 sq feet = ? acres ???
Answered by Penny Nom. |
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Triangles with integer sides |
2005-11-04 |
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From Tammy:
I am trying to find another pair of integer sided isosceles triangles, not the same as the ones listed below, with equal areas.
(5,5,8)
(5,5,6)
Answered by Chri Fisher. |
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5 digit numbers that include 5 and exclude 8 |
2005-11-04 |
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From Paul:
figure out
how many 5 digit numbers are there that include the digit 5 and exclude the
digit 8.
show me how to do get to the answer. (23816)
Answered by Paul Betts. |
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Percent or percentage |
2005-11-03 |
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From Kenneth:
Which word should be used in the following?
Change a (percent or percentage) to a decimal.
Should the word percent be used only when a number precedes it as in 45 percent?
Answered by Harley Weston and Chris Fisher. |
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The length of a chord |
2005-11-03 |
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From Sue:
How do you determine the length of a chord when given the diameter of the circle (1.6m) and that the angle = 7π/8
Answered by Penny Nom. |
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How many passengers boarded the plane in Phoenix? |
2005-11-03 |
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From Vish:
Passengers boarded a plane in Phoenix. In Dallas 1/2 of the passengers got off and 4/5 of the original number got on. In Memphis 3/4 of the passengers got off and twice the number of remaining passengers got on. In Chicago 2/3 of the passengers got off the plane leaving 39 passengers. How many passengers originally boarded the plane in Phoenix?
Answered by Penny Nom. |
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The sides of an octagon |
2005-11-02 |
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From Royce:
I understand there is a simple calculation to determine the sides of an octagon when you know the distance across the parallel flats. something like .447 . can you help?
Answered by Penny Nom. |
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Brochure cost |
2005-11-02 |
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From Duk:
The organizers of the walkathon want to have brochures printed to advertise the event. They get cost estimates from two printing companies. The costs are given by the equations.
Company A : C= 15 + 0.10n
Company B : C= 0.25n
For what number of brochures is the cost the same for both companies?
Answered by Penny Nom. |
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A tangent to a parabola |
2005-11-02 |
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From A student:
Find the point on the curve y=x2 where the tangent to the curve is parallel to the secant line connecting (-1,1) and (2,4)
Answered by Penny Nom. |
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Writing an equation |
2005-11-01 |
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From Richie:
A man's electric bill is $23 less than his gas bill. The two utilities cost him a total of $109. Find the amount of his gas bill.
Answered by Penny Nom. |
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