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Subhotosh Khan
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Subhotosh Khan
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Join Date
06-18-2007
Last Activity
Today
03:15 PM
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Today,
11:09 AM
Subhotosh Khan
replied to a thread
Why is this statement true? Circle algebra
in
Intermediate/Advanced Algebra
Hint: discriminant of a quadratic equation.
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1 replies | 50 view(s)
Today,
05:32 AM
Subhotosh Khan
replied to a thread
a compound interest problem
in
Intermediate/Advanced Algebra
I am not sure - but I think the formula for future value is (1) FV = D*- 1]/(r/n)
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3 replies | 48 view(s)
Today,
05:20 AM
Subhotosh Khan
replied to a thread
Solve for x please -2e^-x = ??
in
Beginning Algebra
As posted this problem statement is incomplete. Please post the complete problem - exactly.
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3 replies | 64 view(s)
Yesterday,
07:52 PM
Subhotosh Khan
replied to a thread
how does the author get this answer
in
Intermediate/Advanced Algebra
That is incorrect. How did you derive those? Let the speed of the swimmer = s the speed of the current = c
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4 replies | 86 view(s)
Yesterday,
01:41 PM
Subhotosh Khan
replied to a thread
Find the value of z complex: z^2+3z(conjugate)=4/z
in
Intermediate/Advanced Algebra
use y^2 = 3x^2 x^3 - 3xy^2 = 4 - 3(x^2 + y^2) x^3 - 9x^3 = 4 - 3(x^2 + 3x^2) 2x^3 - 3x^2 + 1 = 0 (x-1)(2x^2 - x - 1) = 0
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7 replies | 153 view(s)
Yesterday,
10:44 AM
Subhotosh Khan
replied to a thread
Finding Coefficients in Standard Form: (1-2x)^3 = ax^3 + bx^2 + cx + d
in
Calculus
Hint: (a + b)^3 = a^3 + 3 * a * b^2 + 3 * b * a^2 + b^3
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3 replies | 79 view(s)
Yesterday,
10:41 AM
Subhotosh Khan
replied to a thread
Help Please on Data Ranges: want to change "60% to 80%" top "60% to 95%"
in
Probability / Statistics
If you look at the equation for calculating standard deviation, you will see that it does not change due to addition of constant to the data points....
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4 replies | 117 view(s)
Yesterday,
09:10 AM
Subhotosh Khan
replied to a thread
Rearrange to solve G/(x*F)=H for x
in
Intermediate/Advanced Algebra
You are absolutely correct. 7/(x*3)=5 multiply both sides by (x*3). You get: ......................................edited 7 = 5 *...
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5 replies | 120 view(s)
Yesterday,
09:01 AM
Subhotosh Khan
replied to a thread
Fuel Economy is terrible, at 0.65L per km; develop linear model for remaining fuel
in
Beginning Algebra
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
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2 replies | 81 view(s)
Yesterday,
08:59 AM
Subhotosh Khan
replied to a thread
Business Calc: sells 2000 units/month at $10 each; 250 more per $0.25/unit reduction
in
Calculus
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
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2 replies | 54 view(s)
04-22-2018,
04:57 PM
Subhotosh Khan
replied to a thread
Find the value of z complex: z^2+3z(conjugate)=4/z
in
Intermediate/Advanced Algebra
So start: ( x + iy)^2 + 3 * (x - iy) = 4/(x + iy) simplify and equate the real and the imaginary part - independently to zero. You will get...
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7 replies | 153 view(s)
04-22-2018,
04:48 PM
Subhotosh Khan
replied to a thread
Gas Station Loss: cost 3.23/gal, but only charged 2.49/gal; rcpts were $396.20
in
Finance/Business Math
Calculate: How many gallons of gas did you sell for 396.2? How much did you pay for those gallons of gasses? And then loss......
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1 replies | 86 view(s)
04-22-2018,
11:37 AM
Subhotosh Khan
replied to a thread
Find the value of z complex: z^2+3z(conjugate)=4/z
in
Intermediate/Advanced Algebra
What do you exactly mean by: Find the value of z complex: Is it : calculate the "magnitude" of \ z?
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7 replies | 153 view(s)
04-22-2018,
09:54 AM
Subhotosh Khan
replied to a thread
Rearrange to solve G/(x*F)=H for x
in
Intermediate/Advanced Algebra
Can you solve for 'x' from the following equation: 7/(x*3)=5 Can you please discuss the steps?
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5 replies | 120 view(s)
04-22-2018,
09:52 AM
Subhotosh Khan
replied to a thread
What is 1st order homogenous differential equation? (x^2+y^2)dx-2xy dy=0
in
Differential Equations
In your class (or in your textbook) this question must have been discussed. What did those (your classnotes and/or textbook) say?
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1 replies | 89 view(s)
04-21-2018,
08:52 AM
Subhotosh Khan
replied to a thread
Trig. equation: solve 〖cos〗^2 x = 1.5 ×〖sin 〗^2 x on 1st period
in
Geometry and Trig
You can confirm your answer by substituting the calculated values in the given equation and check for "equality".
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1 replies | 106 view(s)
04-21-2018,
08:49 AM
Subhotosh Khan
replied to a thread
Would someone explain how to solve this without brute force plug-n-check?
in
Arithmetic
Let n= the number of attempts and x=the number of successes. then x/n = 0.78 ............(1) and x/(n+1) = 0.7 .......(2) If you divide...
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1 replies | 75 view(s)
04-21-2018,
08:35 AM
Subhotosh Khan
replied to a thread
Formula needed to calculate amount that can be borrowed with max $400 payment
in
Finance/Business Math
Please tell us what formulae you know for calculating mortgage payment
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2 replies | 162 view(s)
04-21-2018,
08:33 AM
Subhotosh Khan
replied to a thread
Formula needed: how to find percentage of interest paid from total amount pd ($4,500)
in
Finance/Business Math
Please share your work in calculating A and B. We can show you then how you can use those processes to compute (C).
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2 replies | 63 view(s)
04-20-2018,
01:07 PM
Subhotosh Khan
replied to a thread
Transformations: Let f(x)=a(x-p)^2+q be a quadratic function, where....
in
Intermediate/Advanced Algebra
What are the differences between f(x) and F(x) ?
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2 replies | 60 view(s)
04-20-2018,
01:00 PM
Subhotosh Khan
replied to a thread
lateral surface area of pentagonal prism; base-edge lengths, height of right prism;
in
Geometry and Trig
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
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3 replies | 119 view(s)
04-19-2018,
01:01 PM
Subhotosh Khan
replied to a thread
Logic Q's: "Beatrice ate 2/3 as many cakes as Annabel would have eaten...."
in
Math Odds & Ends
Nine cupcakes! .... in one sitting!!!
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4 replies | 174 view(s)
04-19-2018,
09:00 AM
Subhotosh Khan
replied to a thread
Finding Equation of plane: (x-1)/-3 = (y-3)/2 = (z+2)/1, w/ point (0,7,-7)
in
Geometry and Trig
There are multiple ways to do perform this task. I would do the following way: Find a point (P) on the given line. Find the equation of the...
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5 replies | 165 view(s)
04-18-2018,
02:07 PM
Subhotosh Khan
replied to a thread
Find values of b so that t^(2)+bt+81=0 has one real solution
in
Beginning Algebra
This is a quadratic equation! How many real solutions can it have? What will be the condition under which it will have ONE real solution?
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3 replies | 167 view(s)
04-18-2018,
09:51 AM
Subhotosh Khan
replied to a thread
Stuck - how to use formula to calculate Marginal costs/ learning curve
in
Finance/Business Math
Did you perform the first task as described in the problem: Assume first that the progress ratio in this industry is 80%. We can then derive the...
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1 replies | 89 view(s)
04-18-2018,
09:47 AM
Subhotosh Khan
replied to a thread
Please help me understand how this works: sqrt[sqrt[sqrt[sqrt[2]]]]=2^x
in
Beginning Algebra
Exactly which step you don't understand? The first step was to re-write the inner-most √2 as 2˝ and continue re-writing from there!
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2 replies | 112 view(s)
04-17-2018,
06:38 PM
Subhotosh Khan
replied to a thread
Polar Coordinates: Writing x^2+y^2+5x=0, x^2(x^2+y^2)=7y^2 as Values of R
in
Geometry and Trig
For problem (1) - rewrite as: (x + 5/2)2 + y2 = (5/2)2 Continue.......
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6 replies | 191 view(s)
04-16-2018,
07:56 PM
Subhotosh Khan
replied to a thread
triangle and trapeze problem pls help
in
Geometry and Trig
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
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3 replies | 131 view(s)
04-16-2018,
09:03 AM
Subhotosh Khan
replied to a thread
Cumulative frequency distribution of past record to calculate estimated P
in
Probability / Statistics
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
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3 replies | 92 view(s)
04-16-2018,
09:02 AM
Subhotosh Khan
replied to a thread
Trajectory problem: Given a 3-dimensional rectangular solid sitting on the earth...
in
Geometry and Trig
What are your thoughts? Please share your work with us ...even if you know it is wrong. If you are stuck at the beginning tell us and we'll...
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1 replies | 58 view(s)
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About Subhotosh Khan
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“... mathematics is only the art of saying the same thing in different words” - B. Russell
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Last Activity
Today
03:15 PM
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06-18-2007
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