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mmm4444bot
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mmm4444bot
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10-06-2005
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08-20-2017
10:14 AM
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08-20-2017,
10:11 AM
mmm4444bot
replied to a thread
Integration by variable substitution: how t^2/(1+t) becomes t - 1 + 1/(1+t) ?
in
Calculus
:idea: Another way to see how one expression comes from another is to work backwards. If you were to combine t - 1 + 1/(t + 1) into a single...
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6 replies | 252 view(s)
08-20-2017,
10:06 AM
mmm4444bot
replied to a thread
Urgently need solution of this question as soon as possible
in
Intermediate/Advanced Algebra
What have you tried or thought about, so far? Please also read the forum guidelines. Thank you. :cool:
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3 replies | 159 view(s)
08-19-2017,
11:26 PM
mmm4444bot
replied to a thread
Solve for w. 3/4w=5=1/2w+9
in
Beginning Algebra
An equation has only one equal sign. Please check your typing. What you have posted has no solution. Also, following Order of Operations, your...
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1 replies | 125 view(s)
08-19-2017,
10:38 PM
mmm4444bot
replied to a thread
Ice-cream problem: banana ice-cream and caramel syrup
in
Probability / Statistics
Are you reading the question similar to having all possible combinations available, and a machine dispenses one at random? If so, then I agree...
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7 replies | 314 view(s)
08-19-2017,
07:42 PM
mmm4444bot
replied to a thread
Simplifying the definite integral of a derivative?
in
Calculus
The answer depends upon the function(s) involved. Can you post a specific example of what you have and explain what you desire? :cool:
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1 replies | 84 view(s)
08-19-2017,
07:37 PM
mmm4444bot
replied to a thread
Determine maximum value of a 4th order polynomial function with two variables
in
Intermediate/Advanced Algebra
If the expression a^2 + 4ab represents a constant, then symbols a and b are not variables.
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3 replies | 164 view(s)
08-19-2017,
07:32 PM
mmm4444bot
replied to a thread
Solving -3 + (100)(29*10^{-12})(e^(V_D/(27*10^{-3})) = V_b
in
Calculus
The given equation represents an equality between a transcendental function and an algebraic function. This type of equation cannot be solved in...
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5 replies | 183 view(s)
08-19-2017,
07:22 PM
mmm4444bot
replied to a thread
System of equations help
in
Beginning Algebra
The exercise statement as posted is flawed. Your equations are correct, using the given information, but the solutions don't make sense. Make...
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3 replies | 137 view(s)
08-18-2017,
02:42 AM
mmm4444bot
replied to a thread
Multiply radical and rational exponents problem
in
Intermediate/Advanced Algebra
If the inserted grouping symbols above are missing at khan, that's their oversight. :cool:
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4 replies | 225 view(s)
08-17-2017,
03:57 PM
mmm4444bot
replied to a thread
Divisibility Question!
in
Intermediate/Advanced Algebra
Factor ax + 15x. You'll then see the quantity multiplying x as a binomial expression. As b is a constant, think of the binomial expression b - 7...
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8 replies | 316 view(s)
08-17-2017,
03:23 PM
mmm4444bot
replied to a thread
GRE Quant part Geometry
in
Geometry and Trig
What is the volume of a solid sphere with radius 6 meters? That's the volume of the wire, too. Think of the wire as a very long cylinder. Use...
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10 replies | 362 view(s)
08-17-2017,
03:12 PM
mmm4444bot
replied to a thread
GRE Quant part Geometry
in
Geometry and Trig
This question could be better-worded. I'm thinking that the building is a cylinder resting on its circular base, and that the staircase winds it's...
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10 replies | 362 view(s)
08-17-2017,
03:00 PM
mmm4444bot
replied to a thread
GRE Quant part Geometry
in
Geometry and Trig
The base of a cube is a square. The base of your cone is a circle. What is the radius of the largest circle that will fit inside a square...
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10 replies | 362 view(s)
08-17-2017,
02:55 PM
mmm4444bot
replied to a thread
GRE Quant part Geometry
in
Geometry and Trig
The formula for percent change is: (NewAmount - OriginalAmount) / OriginalAmount As you were not given the value of the original radius or...
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10 replies | 362 view(s)
08-17-2017,
02:38 PM
mmm4444bot
replied to a thread
GRE Quant part Geometry
in
Geometry and Trig
You can, if you access image software (like MS Paint) that rotates images. The server does not alter the orientation of image files. The images...
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10 replies | 362 view(s)
08-17-2017,
02:02 PM
mmm4444bot
replied to a thread
Integer solutions of log equation: log_4(X^{27}) = [log_4(X)]^4
in
Intermediate/Advanced Algebra
Agree!! I would add it to my list -- if I could find the darn thing.
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11 replies | 390 view(s)
08-17-2017,
01:44 AM
mmm4444bot
replied to a thread
Integer solutions of log equation: log_4(X^{27}) = [log_4(X)]^4
in
Intermediate/Advanced Algebra
I don't think you're missing anything, Jeff. You finished one way; stapel finished a different way. Both methods lead to the same solutions. By...
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11 replies | 390 view(s)
08-16-2017,
06:35 PM
mmm4444bot
replied to a thread
Help with area measurements exponent
in
Geometry and Trig
It's the units which are squared or cubed, not the measurement itself. Area = L × W The units for measuring area are square units. It's common...
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2 replies | 142 view(s)
08-16-2017,
06:18 PM
mmm4444bot
replied to a thread
Integer solutions of log equation: log_4(X^{27}) = [log_4(X)]^4
in
Intermediate/Advanced Algebra
You divided by log_4(X), without knowing its value. If you choose to divide by a symbolic number, then you have already decided that it does not...
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11 replies | 390 view(s)
08-16-2017,
05:58 PM
mmm4444bot
replied to a thread
Why does the sign need to change?
in
Beginning Algebra
I cannot recommend the cymath site. Their software seems confused by certain expressions using standard Function Notation, and cymath sometimes...
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4 replies | 226 view(s)
08-16-2017,
05:47 PM
mmm4444bot
replied to a thread
Graphing set theory: graph {(x, x^2/y) : x in reals, y in naturals}
in
Calculus
Yes. This is one of the special factoring patterns; it's called a "Difference of Squares". y^2 - x^2 = (y + x)(y - x) Your graph ought to have...
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3 replies | 203 view(s)
08-16-2017,
02:18 AM
mmm4444bot
replied to a thread
Arithmetic and geometric progression: Tin ore is extracted from a certain mine....
in
Intermediate/Advanced Algebra
Have you studied Geometric Progressions and how to sum a beginning number of terms in such a progression? tkhunny gave you a good hint: If 8000...
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4 replies | 306 view(s)
08-16-2017,
02:01 AM
mmm4444bot
replied to a thread
Induction: There are two one-letter words in English (“I” and “a”),...
in
Intermediate/Advanced Algebra
That's partially correct. We're concatenating "I" and "a" with those 124 two-letter words, but also with the two 2-character strings "Ia" and "II"...
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3 replies | 619 view(s)
08-15-2017,
11:31 PM
mmm4444bot
replied to a thread
Graphing set theory: graph {(x, x^2/y) : x in reals, y in naturals}
in
Calculus
That 2 is a typo, yes? I agree with you, that y=x^2/y means y^2=x^2, but that doesn't lead to just y=x. What kind of values did you substitute?...
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3 replies | 203 view(s)
08-15-2017,
06:30 PM
mmm4444bot
replied to a thread
30 math questions: solve them with details
in
Beginning Algebra
If you're asking whether we need to add only 30 min to the flying time, then the answer to your question is, "Yes". The plane makes only one stop,...
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13 replies | 654 view(s)
08-15-2017,
02:07 AM
mmm4444bot
replied to a thread
30 math questions: solve them with details
in
Beginning Algebra
I think the plane stops only once (halfway through the 2000 km trip). :cool:
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13 replies | 654 view(s)
08-15-2017,
01:41 AM
mmm4444bot
replied to a thread
Factoring with coefficients: 2y2 + 3y -27
in
Beginning Algebra
You're on the right track, for using the Factor by Grouping Method. 2y^2 + 3y - 27 We multiply A*C = -54 We look for factors of -54 that sum...
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4 replies | 239 view(s)
08-14-2017,
06:32 PM
mmm4444bot
replied to a thread
Math test for 7 year old
in
Pre-Algebra
That phrase seems ambiguous. Here's a set of numbers: 111, 444, 777 Here's another set of numbers: 147, 471, 714 If the author was trying to...
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3 replies | 261 view(s)
08-14-2017,
12:52 AM
mmm4444bot
replied to a thread
30 math questions: solve them with details
in
Beginning Algebra
Question #16 requires one arithmetic step: reduce the given ratio (3/12) to lowest terms. Do you know how to do that? :cool:
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13 replies | 654 view(s)
08-12-2017,
03:51 AM
mmm4444bot
started a thread
Cryptic Correspondence?
in
Math Odds & Ends
Write a second letter to cut trees! (4)
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0 replies | 220 view(s)
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March 12, 1951 (66)
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Phototypographer, Bank Courier, Computer Programmer, EMT, ER Physicians Asst, Math Tutor, Retirer, +
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