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The sum of twice a number and 6 is 8 |
2010-05-12 |
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From MAE:
THE SUM OF TWICE A NUMBER AND 6 IS 8 . FIND THE NUMBER
Answered by Penny Nom. |
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Sammy and his motorboat |
2010-05-11 |
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From Jordan:
Sammy owns a motorboat that travels 4 miles/hour in still water. It goes 12 miles upstream and 12 miles back again (downstream) in a total of 8 hours. Find the speed of the current of the river.
Answered by Penny Nom. |
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The product of two consecutive even integers |
2010-05-11 |
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From Terry:
The product of two consecutive even integers is 14 more than their sum. Find the integers.
Answered by Penny Nom. |
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Modelling an underpass |
2010-05-11 |
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From Sue:
An engineer at the Ministry of Transport is creating the plans for a new road. This road
will cross the path of a busy railway track so it will be necessary to built an underpass for this road.
This underpass will be in the shape of a parabolic arch.
The specifications include:
-the road must be at least 10 m wide and it must have shoulders at least 2 m wide on either
side of the road.
-there must be a clearance of 3 m over all areas of the road.
What quadratic equation could you use to model this bridge.
Answered by Penny Nom. |
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x and y intercepts |
2010-05-10 |
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From connor:
im not sure how to find the x intercept in questions like
2x+3y-12=0
5x-2y-12=0
if you could show me how to find the x and the y intercepts out of this equation that would be great
thanks connor
Answered by Penny Nom. |
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Six numbers from 1 to 20 |
2010-05-10 |
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From martine:
how many different combinations can be made from numbers 1 to 20 using them only once in a six number scale
Answered by Penny Nom. |
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The area of a triangle |
2010-05-10 |
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From Saeed:
Show that:
Area of triangle = half of the perimeter of the triangle times
the radius of the inscribed circle !!!!!!!!!!!!!!!
Answered by Penny Nom. |
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Painting a hemispheric dome |
2010-05-09 |
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From Jone:
If a hemispheric dome has a height of 20m and it take 5 gallons of paint
to paint the floor, how many gallons of pain are needed to paint the
inside of the dome?
Answered by Penny Nom. |
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The nth term |
2010-05-09 |
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From Jessica:
what is the nth term of 3, 9, 19, 33, 51
please help
Answered by Walter Whiteley. |
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The altitude of a triangle |
2010-05-08 |
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From kylie:
the vertex angle of an isosceles triangle is 57 degrees 24 minutes and each of its equal sides is 375.5 feet long. find the altitude of the triangle
Answered by Penny Nom. |
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The dimensions of a driveway |
2010-05-07 |
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From Josh:
Dave and Jane have a new rectangular driveway. The perimeter of the driveway is 168 feet. The length is 12 feet longer than three times the width. What are the dimensions of the driveway?
Answered by Penny Nom. |
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An angle in a triangle |
2010-05-06 |
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From Morgan:
Question from Morgan, a student:
t
8 t t 8
t 78 t
t t
t t
t x t
ttttttttttttttttttttttttt
10
I'm having trouble solving for x I'm not sure where to start ( the ones in the middle of the triangle are both degrees) thanks in advance for your help i really do appreciate it
Answered by Penny Nom. |
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A 22 litre bag of topsoil |
2010-05-06 |
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From Blanche:
I do a fair amount of gardening when the weather permits. Just wondered if anyone call tell me what a 22 litre bag of topsoil would weigh and how to convert that. My husband says 20 lbs. I say noway I think it's more. Thanks to whomever can help me. :)
Answered by Penny Nom. |
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Line of sight |
2010-05-06 |
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From David:
I live in St. Joseph, Michigan and there is an ongoing argument regarding line-of-sight over the horizon.
Standing on a 200 foot high bluff here, people swear they can see the top of the Willis (nee Sears) Tower in Chicago, which is about 1653 feet high.
It is my contention that this is actually a "refracted reflection" and not direct-line-of-sight.
So, to settle the argument, I'd sure like some simple explanation for this, even if-and I hope not-I am incorrect.
David
Answered by Harley Weston. |
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A loop |
2010-05-05 |
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From Amir:
what is loop theory in algebra?
Answered by Chris Fisher. |
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