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Identify the graph |
2008-05-05 |
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From A parent:
Refer to the graph given below and identify the graph that represents the corresponding function. Justify your answer.
y = 2x
y = log2x
I can figure out what line on the graph is which equation but unsure what is meant by justify your answer.
Answered by Penny Nom. |
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Un tetraèdre régulier |
2008-05-05 |
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From delabroye:
La figure ci-contre est un tetraèdre régulier :
AB = AC = BC = AD = 6cm
1) Représente un patron de ce tetraèdre
2) Calcule le volume de ce tétraèdre
Answered by Thierry Moisan. |
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BEDMAS |
2008-05-04 |
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From Bernie:
Can you please solve one mathematical equation for me which is as follows. 3 squared - (5 + 16 divided by 4 times 2)
Answered by Penny Nom. |
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The distance from the chord to the centre |
2008-05-04 |
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From sle:
What is the method for figuring this type of question out?
in a circle whose radius is 25, a chord has a length of 40. find the distance of this chord from the center of the circle
Answered by Penny Nom. |
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How many presses should be used? |
2008-05-04 |
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From Sarah:
Hi! I am in Calculus and this problem is on my study guide and i just cant figure it out!?
A printing company had eight presses, each of which can print 300 copies per hour. It costs $5.00 to set up each press for a run and 12.5+6n dollars to run n presses for an hour. How many presses should be used to print 6000 copies most profitably? Let h equal the number of hours used to print the 6000 copies.
Answered by Harley Weston. |
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Zero divided by infinity |
2008-05-03 |
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From ANNE:
There was a question about what do you get when you divide Zero by infinity. There was an example using Potatoes. Could someone please explain a little bit more in detail, so that I can help my son who has Schizophrenia understand. He is big into Mathematics and is consumed by this question.
Thankyou so much,
Anne
Answered by Penny Nom. |
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A root of a polynomial |
2008-05-03 |
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From john:
here is a word problem that my teacher gave us to do can you help me understand it
Give possible formulas (in factored form) and sketch the graphs for two different polynomials that have roots -3, -1, and 2, but cross the x-axis only at x=2 and have y-intercept 4.5. What is the lowest degree such a polynomial can have? Can it have an even degree? An odd degree? Explain why.
her term "root" has completely thrown me off, i've reviewed my book and cant find what she is referring to. can anyone help?
Answered by Penny Nom. |
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Four cookies |
2008-05-03 |
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From tashera:
if a serving is 5 cookies. how many servings can i make from 4 cookies?
Answered by Stephen La Rocque. |
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The inverse of a function |
2008-05-03 |
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From keith:
please help me find the inverse of this function:
h(t) = 2 + 4 ln(1-5t)
Answered by Stephen La Rocque. |
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(1-i)ln(1+i) |
2008-05-02 |
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From Kim:
I am stuck on the expansion of (1-i)ln(1+i)=(1-i)[ln(square root of 2)+i(3.14/4 = 2n3.14)]
Answered by Harley Weston. |
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Determinants |
2008-05-02 |
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From Henry:
I have a question about solving 3x3 matrices.
The traditional way, or at least the way I've been taught, is that if one has a 3x3 matrix such as:
[ a b c ]
[ d e f ]
[ g h i ]
one solves it according to this formula:
[ei - hf) - (bi - hc) + (bf - ec) = determinant.
According to a book I'm now studying to prepare for the California CSET exam, there is another, easier, way to solve it:
[ a b c ] [ a b ]
[ d e f ] [ d e ]
[ g h i ] [ g h ]
In other words, one repeats the first two rows of the matrix and adds them to the right.
At this point, the determinant is calculated thus:
(aei) +(bfg) + (cdh) - (gec) - (hfa) - (idb).
Is this, in fact, correct?
Answered by Harley Weston. |
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Markup |
2008-05-02 |
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From Sussie:
I sold an item for $75.00
It cost me $17.00
How do I calculate to come up with the Markup %?
Answered by Penny Nom. |
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How many gallons are in 1,500 liters? |
2008-05-01 |
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From bambi:
[How many gallons are in 1,500 liters?
Answered by Penny Nom. |
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Division by zero |
2008-05-01 |
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From Bill:
Why does multiplication have a favored status so as to make division by zero undefined?
Answered by Harley Weston. |
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1/3-5/6=1/x, solve for x |
2008-05-01 |
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From Lavada:
1/3-5/6=1/x How do I solve this problem.
Answered by Penny Nom. |
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