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Today,
05:09 PM
Subhotosh Khan
replied to a thread
word problem
in
Arithmetic
So the combined data usage charge = 125 - 82 = 43 How would split this bill? What are your thoughts? Please share your work with us ...even...
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1 replies | 16 view(s)
Today,
04:58 PM
Subhotosh Khan
replied to a thread
Factorize x^5-16x- how do u do questions like this?
in
Intermediate/Advanced Algebra
x^5 - 16x ....................... Is there a common factor ← yes → factor that out. = x * (x^4 - 16) = x * (x^4 - 2^4) What is special...
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1 replies | 18 view(s)
Today,
04:45 PM
eddy2017
started a thread
word problem
in
Arithmetic
Hi, my name is Eddy. I am struggling with this here word problem. I would appreciate any help which include steps and rationale behind the steps....
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1 replies | 16 view(s)
Today,
04:41 PM
Denis
replied to a thread
Volumetric Displacement Question (3,000 barrels of toxic chemicals)
in
Geometry and Trig
Easier with beer barrels: https://playback.fm/charts/top-100-songs/video/1939/Will-Glahe--his-Orchestra-Beer-Barrel-Polka-Roll-out-the-Barrel
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10 replies | 589 view(s)
Today,
04:30 PM
Denis
replied to a thread
Hard discriminant question
in
Beginning Algebra
a = k + 1 b = -4k c = 3k discriminant = b^2 - 4ac = Your discriminant calculation is not correct. Please try again.
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2 replies | 52 view(s)
Today,
03:14 PM
shapoey
started a thread
Factorize x^5-16x- how do u do questions like this?
in
Intermediate/Advanced Algebra
Hi, I wanted to ask how to do questions like the one that I put in the title,\- would you o, in the first step, separate the equation into x^2.5...
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1 replies | 18 view(s)
Today,
02:23 PM
yma16
replied to a thread
Help (proving quadrilateral is a parallelogram).
in
Geometry and Trig
This problem should be in words, not in a picture like that. If you need a proof, let me know and I'll write one for you.
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4 replies | 103 view(s)
Today,
01:24 PM
kinosh
started a thread
When does infinity apply?
in
Calculus
Problem: Find the asymptotes of the hyperbola 4x^2 + 5xy + y^2 = 10. The book says to rearrange this equation to y^2 + (5x)y + (4x^2 - 10) = 0,...
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0 replies | 31 view(s)
Today,
01:20 PM
j-astron
replied to a thread
How Often Will It Occur
in
Probability / Statistics
This is a tricky problem to answer. To me it sounds like an application of a Poisson random variable, which is a random variable describing the...
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1 replies | 46 view(s)
Today,
12:13 PM
j-astron
replied to a thread
Frequency for rolling a die (without replacement)...and finding expected value
in
Probability / Statistics
When you are counting it out brute force, what you are trying to do is list all possible unique pairings: 1+2 = 3 1+3 = 4 1+4 = 5 1+5 = 6 1+6...
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2 replies | 75 view(s)
Today,
11:56 AM
j-astron
replied to a thread
Frequency for rolling a die (without replacement)...and finding expected value
in
Probability / Statistics
Hello earthman, Here is my first thought, on the counting of the possible outcomes. The ordering doesn't matter. The problem doesn't even say that...
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2 replies | 75 view(s)
Today,
11:44 AM
Falcon9
started a thread
interquartile range from frequency table
in
Probability / Statistics
I have attached a word document here (https://drive.google.com/open?id=1pFk14mHGyzVa33b1RH7OLaGMio1BpmWt) with the frequency table along with my...
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0 replies | 28 view(s)
Today,
11:28 AM
Subhotosh Khan
replied to a thread
Volumetric Displacement Question (3,000 barrels of toxic chemicals)
in
Geometry and Trig
200*50 = 10000 m^2 Each barrel thrown in water will actually lower the water level of the lock by 1/10000 m (0.1 mm). The barge will rise 1 mm...
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10 replies | 589 view(s)
Today,
10:22 AM
Subhotosh Khan
replied to a thread
I need help to find det of this matrix
in
Calculus
Did you calculate the expressions for (dx/dΘ), (dy/dΦ), etc. ?
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1 replies | 41 view(s)
Today,
10:17 AM
Subhotosh Khan
replied to a thread
Hard discriminant question
in
Beginning Algebra
If the equation was: A * x^2 + B * x + C = 0 ..................(Where A, B & C are constant) what would have been your discriminant?
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2 replies | 52 view(s)
Today,
10:03 AM
Alpha6
replied to a thread
Help (proving quadrilateral is a parallelogram).
in
Geometry and Trig
Yes, I know in an isosceles trapezoid the 2 legs can be congruent and not parallel but the isosceles trapezoid looks like this: With the 2...
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4 replies | 103 view(s)
Today,
09:42 AM
lev888
replied to a thread
Simplification of Product Rule
in
Calculus
Do you see 2x+1 in both terms?
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1 replies | 52 view(s)
Today,
09:07 AM
Hama
started a thread
I need help to find det of this matrix
in
Calculus
Hi I know how to find the determinant of matrix with numbers but I dont understant anything from this problem! Can you help? Here is the link (I...
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1 replies | 41 view(s)
Today,
03:32 AM
radnorgardens
started a thread
Simplification of Product Rule
in
Calculus
Hi all, I'm learning the rules of differentiation, specifically the product rule. I understand the steps to obtain an answer, but am stuck when...
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1 replies | 52 view(s)
Today,
02:53 AM
yma16
replied to a thread
Help (proving quadrilateral is a parallelogram).
in
Geometry and Trig
If you draw two vertical lines at the corners, the two line segments have equal length. Therefore, the two triangles formed by the two vertical...
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4 replies | 103 view(s)
Today,
12:18 AM
Dr.Peterson
replied to a thread
Help (proving quadrilateral is a parallelogram).
in
Geometry and Trig
Have you ever seen an isosceles trapezoid?
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4 replies | 103 view(s)
Today,
12:06 AM
Alpha6
started a thread
Help (proving quadrilateral is a parallelogram).
in
Geometry and Trig
I said "yes" but got it wrong. An explanation someone told me was that we do not know for sure that the 2 legs are parallel or that the top and...
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4 replies | 103 view(s)
Yesterday,
11:21 PM
earthman
started a thread
Frequency for rolling a die (without replacement)...and finding expected value
in
Probability / Statistics
Credit for this math problem goes to the Cirrus Test Prep company's book Praxis Mathematics Content Knowledge 5161. I took it from the book...
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2 replies | 75 view(s)
Yesterday,
10:53 PM
bennyJ
replied to a thread
Volumetric Displacement Question (3,000 barrels of toxic chemicals)
in
Geometry and Trig
Correct you are. And, yes, there will be some fine tuning required for the solution, it seems. Thanks for the direction.
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10 replies | 589 view(s)
Yesterday,
10:39 PM
cainweb
started a thread
How Often Will It Occur
in
Probability / Statistics
I'm working on a paper, and want to express how often something will occur. I'm not a math guy (obviously): If there are 131,800 homes and one...
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1 replies | 46 view(s)
Yesterday,
10:16 PM
phillipa
started a thread
Hard discriminant question
in
Beginning Algebra
Hi, I have the following problem and have little idea how to go about doing it: For which values of k does (k+1)x^2-4kx+3k=0 have: (i) one...
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2 replies | 52 view(s)
Yesterday,
06:04 PM
Dr.Peterson
replied to a thread
Looking easy but hard question on geometry
in
Geometry and Trig
You're my kind of person! You took the challenge. I'm sure that work can be shortened a bit, but it's definitely a proof.
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15 replies | 453 view(s)
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