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Set up two simultaneous equations |
2007-05-21 |
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From Admire:
The cost of producing windscreen wipers blades at a factory ais partly fixed (due to operating overheads) and partly dependent on the number of blades produced. It costs $300 to produce 1000, and $600 to produce 5000 blades. How much would it cost to produce 24000 blades?
Answered by Penny Nom. |
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A push button lock |
2007-05-21 |
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From Werner:
I have a push button lock (the numbers entered does not have a start and end i.e. 1234 = 4321 or 2341 = 3241 ...)
So if it is a 4 digit code and you have 10 buttons (0 to 9) there should be 5040 (?) possibilities and how would I list these unique combinations
Answered by Penny Nom. |
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Constant rate of sand falling in a cone |
2007-05-20 |
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From Nhi:
Sand is falling into a conical pile . After 5 min. the pile has radius 24 and height 26 . After 7 min. tell how far the point c. is from the top of the cone (A).
Answered by Stephen La Rocque. |
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Total of 100 with 1, 2, 3, 4, 5, 6, 7, 8, 9 |
2007-05-20 |
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From Tyler:
use all the numbers shown, any of the following four operations +,-,x, and division
and parentheses to make a total of 100. You may not change the order of the
numbers, or use them more than once.
1 2 3 4 5 6 7 8 9
Please help asap I can't figure this out.
Thank you
Tyler
Answered by Stephen La Rocque. |
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Areas of polygons |
2007-05-20 |
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From kendra:
i have questions on how to find the area of pentagons, hexagons, and nonagons.
i was asked to find the area of all of them and they gave me either the length of one side or the perimeter.
Answered by Stephen La Rocque. |
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Probability tree |
2007-05-19 |
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From Patrick:
My question involves a video game called Guild Wars. In the game you can have modifications(mods) on items. One such mod is that you have a 20% chance to halve the casting time of a spell. You can have 2 of these mods available to you. Now, it is to my understaning that combined, you would have a 32% chance to halve the casting time and a 4% chance to quarter the casting time. Is this correct?
Answered by Stephen La Rocque. |
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Base seven |
2007-05-19 |
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From Dan:
A number X is converted to base 7 and becomes a four digit number. Its leftmost digit is removed and written again as the rightmost digit. The number thus obtained is twice X. Find the decimal representations of all such numbers X.
Answered by Penny Nom. |
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Parabolas in the real world |
2007-05-18 |
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From Katherine:
Hi, my name is Katherine, and my mean old math teacher just assigned us a test in which
we have to write two examples of how parabolas are used in the real world, each one page
single spaced, size 12!! I know you have already answered some questions like this, but
I still don't understand the whole baseball thing, and any other way parabolas are used.
And how I can write a whole page on it. But that's my problem, not yours, I just need help
with a little explanation on how parabolas are actually used today. I know this might be kind
of confusing for you, but imagine how it is for me!!
Answered by Stephen La Rocque. |
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If I know the total is 15% over cost, what is the cost? |
2007-05-18 |
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From Theresa:
I have a job that is $25,250 total to complete the job. The customer asked how
much am I charging. I told him I was charging 15% over the Cost. What is the
formula to calculate the cost of the job?
Answered by Stephen La Rocque. |
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Using FOIL for (2x - 6)^2 |
2007-05-18 |
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From TONI:
I am having a problem finding examples of how to solve (2x-6)^2.
Answered by Stephen La Rocque. |
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Divisibility |
2007-05-18 |
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From Ashish:
A number is divisible by 2^n if the last n digits of the number are divisible by 2^n.
Why?
Answered by Penny Nom and Claude Tardif. |
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(3x-2(x-3)+2)(3x-2(x-3)+2) |
2007-05-17 |
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From Jeff:
(3x-2(x-3)+2)(3x-2(x-3)+2)
Answered by Penny Nom. |
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Finding square roots |
2007-05-17 |
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From Chandler:
I would like an easy way to find the square root of a number.
Answered by Gabriel Potter. |
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Students in rows |
2007-05-17 |
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From Ashi:
the student of three classescan be made to stand into rows having same number of students. there are 24,36 and 60 students in the classes. how many maximum number of student will stand in each row.
Answered by Stephen La Rocque. |
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Lateral area of a right cone |
2007-05-17 |
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From Crystal:
In my homework the question says the lateral area of a right cone is 226.08 cm cubed.
the slant hieght is 12 cm. Find the total surface area. How do I do that?
Answered by Stephen La Rocque. |
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