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The area of a triangular garden |
2011-10-31 |
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From tasha:
a garden has sides of 6m,8m and 10m find the area
Answered by Chris Fisher. |
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A scale drawing |
2011-10-30 |
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From aretha:
i have a scale drawing of a house floor plan, don't understand how
to find the answer. the drawing is 1in: 3ft. need to find the length /
width/and the actual length/width of the living room,kitchen, 3bedrooms
deck,sitting room, entry, and closet
Answered by Penny Nom. |
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Three consecutive terms of an arithmetic sequence |
2011-10-30 |
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From Juliette:
Find X when x, 1/2x + 7, 3x -1 are consecutive terms of an arithmetic sequence.
Answered by Penny Nom. |
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Modular arithmetic |
2011-10-30 |
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From Kim:
Hello,
I am editing a resource for students, and I think some of the answers may be incorrect.
The text I was given and my questions are in the attachment.
Any help you could give would be appreciated.
Thanks,
Kim
Answered by Harley Weston. |
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The LCM of 6,15 and x is 90 |
2011-10-30 |
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From Richie:
Hi there,
There are 2 parts to the question.
#1. Factorise 90. This is easy, 90=2x3x3x5
#2
LCM of 6,15 and x is 90. What are possible values of x if x is odd?
From #1, since 90=6x15, how can this be used to work out possible values of x?
Thanks in advance,
Richie
Answered by Penny Nom. |
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The average speed for the whole journey |
2011-10-30 |
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From Shahzad:
a train travels 68 Km at an average speed of 51Km/h. It then travels another 20Km at an average speed of 40Km/h before reaching its destination. Calculate the average speed for the whole journey?
Answered by Penny Nom. |
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Factor |
2011-10-30 |
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From Dawn:
x^2 -6x+9-4y
Answered by Penny Nom. |
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A vector geometry problem |
2011-10-28 |
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From aishwarya:
hi...my name is Aishwaarya and i am a student from India..
My problem is in vector geometry which i am sending u my an attachment
including a diagram..
Thanks
Aishwarya
Answered by Chris Fisher. |
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A mythical soccer ball |
2011-10-27 |
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From Joel:
We've been working on this problem diligently and can't seem to come up with the answer book's answer. We think it may be wrong, yet want to check it with an expert. Here goes.
The school's new soccer balls are covered with 64 regular hexagonal panels. Each hexagon measures 2 inches between opposite corners and 1.5 inches between opposite sides. What is the total surface area of the soccer ball?
Answered by Robert Dawson and Lorraine Dame. |
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The square root of z=3+4i |
2011-10-27 |
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From dianah:
how to find the square roots of complex number, z=3+4i
Answered by Robert Dawson. |
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Problem solving |
2011-10-27 |
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From keelan:
a number is divided by 5. then 3 is added to the quotient. after subtracting 10, the results is 30.what is the number.t
Answered by Penny Nom. |
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3 fish |
2011-10-27 |
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From Ann:
You have 3 fish weighing a total of 21 lbs. The largest fish weighs twice as much as the second fish and the third fish weighs half the amount of the second fish.
So how much does the third fish weigh?
Answered by Penny Nom. |
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A spherical ball in a conical wine glass |
2011-10-26 |
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From Jules:
A heavy spherical ball is lowered carefully into a full conical wine
glass whose depth is h and whose generating angle (between the axis
and a generator) is w. Show that the greatest overflow occurs when the
radius of the ball is (h*sin(w))/(sin(w)+cos(2w)).
Answered by Claude Tardif. |
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1 divided by 0 and infinity |
2011-10-24 |
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From ritika:
we say that one divided by zero gives us infinity, then why zero multiplied by infinity does not gives us one?????????????
Answered by Robert Dawson. |
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The number of People who Know Each Other |
2011-10-21 |
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From Ted:
I'm trying to prove that at a party
where there are at least two people,
there are two people who know the
same number of other people there.
Answered by Robert Dawson and Penny Nom. |
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