You are here:

- Home
- Science
- Mathematics
- Advanced Math

Subject | Date Asked | Expert |

linear algebra | 1/13/2017 | randy patton |

Q: i'm having trouble to find the trace in given problem... Que. Let In & On denote n×n identity and ... A: I think the trace of X should be zero. Here's my derivation: Traces have some simple and useful ... | ||

linear algebra | 1/2/2017 | randy patton |

Q: Let S be the subspace of Mn×n (the vector space of all n×n matrices) of the form AB-BA with A,B in ... A: For A and B are in Mnxn, the form S = AB - BA, is called a commutator, made famous by the ... | ||

abstract algebra | 12/7/2016 | Socrates |

Q: Sir,I'am having trouble to solve this question.it's taking much time to solve... Que. Let S10 ... A: I can give you a quick answer , assuming you know a bit about permutations and conjugates. Let C be ... | ||

Randomly dividing a number | 12/3/2016 | Scott A Wilson |

Q: I am working on a restaurant assignment and feel really lost. What number combinations can $355,546 ... A: I used a spreadsheet (by Excel). Note that is the value is in ' ', I only input what is between the ... | ||

Width Follpw-up | 11/29/2016 | Janet Yang |

Q: A wooden plaque (square) has a metal inlay (square) in the center, with a wooden strip of uniform ... A: area of metal = y² area of wood = x²-y² y²:(x²-y²) = 25:39 39y² = 25(x²-y²) = 25x² - 25y² 64y² = ... | ||

Functional analysis | 11/21/2016 | randy patton |

Q: Plz Give me an example of an unitary operator on an infinite dimentional hilbert space...thank u sir ... A: We can take as an example of an infinite Hilbert space the space of complex functions f of a complex ... | ||

Math | 10/18/2016 | Scott A Wilson |

Q: 1. What is the formula to determine the number of squares in a square box divided into 16 squares? ... A: 1. If there are n squares in the box and each square in a box is divided into 16 squares, the ... | ||

approximate value of the sum of two real numbers | 10/11/2016 | Scott A Wilson |

Q: Consider that 3 is an approximation to a real number x with an error below 0.2 and that -4 is an ... A: Thy symbol ± is for plus or minus. As in 1 ± 0.3 is used for a number between 0.7 and 1.3. We are ... | ||

Chemical reactions between acids with acids. | 10/1/2016 | Scott A Wilson |

Q: What will be the chemical reactions between acids mixed together with different Combinations? ... A: From what I remember of chemistry, there is no chemical reaction among acids. Reactions only occurs ... | ||

Logarithms | 9/21/2016 | Scott A Wilson |

Q: What's the point of having natural logarithms when you can just have log to the base of 2.7? (which ... A: The value of the letter e is determined by bankers and mathematicians. For bankers, though in ... | ||

Combinations | 9/21/2016 | Paul Klarreich |

Q: I am learning basic probability. Please help me solve the following probability problem, which seems ... A: Questioner:JohnnyX Country:Norway Category:Advanced Math Private:No Subject:Basic ProbabilityI ... | ||

Rubik's cube variation. | 9/18/2016 | Scott A Wilson |

Q: Will there be any variation in Rubik's cube if instead of six colors, there are three colors say ... A: If three of the sides are colors and three of the sides are numbers, there will be no variation. ... | ||

Uppercase and Lowercase vowels and consonants in Scrabble game. | 9/14/2016 | Scott A Wilson |

Q: Will it be useful to have both uppercase and lowercase vowels and consonants in Scrabble word power ... A: I don't think it would be useful to have lower case letters. If, for example, the word, 'FISH' was ... | ||

Trigonometry | 8/29/2016 | Paul Klarreich |

Q: Find the exact value of the sine, cosine, and tangent of –210°. and Find cot (–290°). Point P ... A: Questioner:adelefair Country:New Jersey, United States Category:Advanced Math Private:No ... | ||

Composition of Functions | 8/25/2016 | randy patton |

Q: Express the function f(x) = 1/(x+1) in the form goh. If h(x) = x+1, find the function g(x). f(x) = ... A: Defining h(x) = 1+x is a good start. Now we want to end up with f(x) = 1/(x+1) which would be f(x) ... | ||

Please help give some comment | 8/11/2016 | Paul Klarreich |

Q: I found this "note" on my school computer and would like to ask if you think it makes any sense, ... A: I am afraid this 'note' is simply incoherent rambling from someone who has nothing to say but loves ... | ||

Eigen Values | 7/27/2016 | randy patton |

Q: Patton, I am an engineering graduate..I have done vector calculus and matrix algebra. One thing ... A: I agree that eigenvalues and eigenvectors can be a bit of a mystery. I’ve come to think of ... | ||

Confusing Rates | 7/26/2016 | Sombra Shadow |

Q: What is a simple solution to the following? If 20 men can paint 5 houses in 10 days, how many days ... A: 20 men can paint 5 houses in 10 days so that is 4 houses every 10 days per man. At that rate 40 men ... | ||

Ferris/Giant Wheel Electronic toy design. | 7/26/2016 | Scott A Wilson |

Q: Is it possible to design a Ferris wheel electronic toy operated by a remote control and having push ... A: To view a few, just type, "Ferris Wheel," in the search box. I not only answered this question, but ... | ||

T square and Set square construction materials. | 7/26/2016 | Scott A Wilson |

Q: Which of the following can be considered as the best material for constructions T square and Set ... A: I would not use rubber, for that would make the square two flexible. If glass were used, the square ... | ||

Amount Invested | 7/26/2016 | Janet Yang |

Q: A, B, C, and D invest $s. B invests m times as much as A, C as much as A and B combined, and D as ... A: "A, B, C, and D invest $s." A+B+C+D = s "B invests m times as much as A" B = mA "C invests as much ... | ||

Partial Differential Equations comprising of complex numbers. | 7/25/2016 | Scott A Wilson |

Q: Can Partial Differential Equations comprise of complex numbers? Thanks Prashant A: Yes, and I'll give a simple one. It can something as simple as f' - if = 0. In that case, f(x) = ... | ||

Simultaneous equations having complex numbers. | 7/23/2016 | Scott A Wilson |

Q: Can Simultaneous equations have complex numbers and can be solved? Example (1+2i)x+(2+3i)y=5 ... A: Yes they can. For the 1st equation, multiply by the conjugate of 1 + 2i (which is 1 - 2i). For the ... | ||

Symbolic logic and Venn diagrams. | 7/20/2016 | Paul Klarreich |

Q: I want to ask whether my understanding of mathematical statements and their converse, inverse, ... A: Questioner:Apoorv Country:India Category:Advanced Math Private:Yes --- CORRECTED. Subject: ... | ||

Compute exponentiation of two complex numbers. | 7/20/2016 | Scott A Wilson |

Q: Can we compute the exponentiation of two complex numbers? Example - 1+2i and 2+3i I.e 1+2i raised ... A: Yes, it can be done. They have found that complex numbers allow all operations to be done. Note ... | ||

Compute Average of few complex numbers. | 7/14/2016 | Scott A Wilson |

Q: Can we compute average of few complex numbers?. Thanks Prashant A: Yes. If we had the number 1+2i, 3+5i, and 5+5i, the average would be (1+3+5)/3 + [(2+5+5)/3]I. The ... | ||

A level Maths. remainder theorem | 7/4/2016 | Ahmed Salami |

Q: when a polynomial f(x) is divided by (x-3) the remainder is -9 and when divided by (2x-1), the ... A: From the information provided about the remainders when f(x) is divided by each of x-3 and 2x-1, we ... | ||

trignometry | 6/29/2016 | Scott A Wilson |

Q: sec^6x-tan^6x-3sec^2x*tan^2x=1 how to prove A: At 1st I will used the way I know clearly. Note that sec(x) = 1/cos(x) and tan(x) = sin(x)/cos(x). ... | ||

trignometry | 6/29/2016 | Janet Yang |

Q: sec^6x-tan^6x-3sec^2x*tan^2x=1 how to prove this identity A: sec⁶θ - tan⁶θ - 3sec²θtan²θ = (sec²θ -tan²θ) ... | ||

Sequence | 6/21/2016 | Scott A Wilson |

Q: Starting a sequence with these four items: (2,-4);(16,-10); (54,-16);(128,-22) ... The question ... A: The 2nd sequence is -4, -10, -16, -22 ... After looking at this, the difference is -6. This gives ... | ||

Vectors | 6/15/2016 | Scott A Wilson |

Q: The lines l1 passes through the point A whose position vector is i + 3j -4k and is parallel to the ... A: Sorry about the delay, but I just got to the question. The variables to be used are a, b, and c. ... | ||

Solve this equation for x | 6/13/2016 | randy patton |

Q: Trying to solve x*(x^x)=a for x, this is what I tried: $$x*(x^x)=a$$ $$x^{x+1}=a$$ ... A: I don't think this expression has a closed form formula for x. The best you can hope for is a series ... | ||

Garden: Width, Area | 5/18/2016 | Janet Yang |

Q: A rectangular garden is to contain an acre. Length: 80 yards. Determine width. Outside area: ... A: I'm assuming that the "outside area" is not part of the garden. garden area = 80 yd × W yd = 4,840 ... | ||

help | 5/17/2016 | Sombra Shadow |

Q: Sir i want an help from you that in our school there is a skit in ''invention of numbers" . Can you ... A: Numbers began as tic marks on caves where each tic mark represented an item, whether it be a child, ... | ||

Relations( concerning sets) | 4/19/2016 | Ahmed Salami |

Q: I've started doing sums from 11th grade books and in the second chapter concerning relations between ... A: The modulus of a complex number z = a + bi is given by the positive value of |z| = √(a² + b²) ... | ||

Advanced Probability | 4/18/2016 | randy patton |

Q: Ten numbers have a mean of E(X)=12 and a variance of V(X) = 3. If we add 5 to each of the original ... A: This looks like a homework problem, but I'll help anyway. The expected value, E(X), is obtained by ... | ||

Advanced Probability | 4/18/2016 | randy patton |

Q: I have a joint probability mass function: p(x,y)=2xy/108 (for x=1,3,5; y = 1,2,3) How do I ... A: Ricardo, Another HW problem (?!). The marginal distribution for x is obtained by summing p(x,y) ... | ||

Advanced Probability | 4/18/2016 | randy patton |

Q: The density function of a continuous random variable x is f(x) = -(3/4)(x^3 - 5x^2 + 7x - 3) for ... A: Normally I don't like to answer homework problems but let me help you out a little here (in the ... | ||

Number of Revolutions- Solution/Explanation | 4/12/2016 | Janet Yang |

Q: I have attached a problem about number of revolutions with solution. Please explain the solution. ... A: The solution shows only the end result, after converting unit. It doesn't show the previous steps in ... | ||

Finite Mathematics | 4/10/2016 | Paul Klarreich |

Q: Five teachers each attend a dance recital with one of their students. In how many different ways can ... A: Questioner: Nicholas Country:British Columbia, Canada Category:Advanced Math Private:No ... |

Advanced Math

Answers by Expert:

Top Expert on this page

I can answer any question in general math, arithetic, discret math, algebra, box problems, geometry, filling a tank with water, trigonometry, pre-calculus, linear algebra, complex mathematics, probability, statistics, and most of anything else that relates to math. I can also say that I broke 5 minutes for a mile, which is over 12 mph, but is that relevant?

Experience in the area; I have tutored people in the above areas of mathematics for over two years in AllExperts.com. I have tutored people here and there in mathematics since before I received a BS degree back in 1984. In just two more years, I received an MS degree as well, but more on that later.
I tutored at OSU in the math center for all six years I was there. Most students offering assistance were juniors, seniors, or graduate students. I was allowed to tutor as a freshman.
I tutored at Mathnasium for well over a year.
I worked at The Boeing Company for over 5 years.
I received an MS degreee in Mathematics from Oregon State Univeristy.
The classes I took were over 100 hours of upper division credits in mathematical courses such as
calculus, statistics, probabilty, linear algrebra, powers, linear regression, matrices, and more.
I graduated with honors in both my BS and MS degrees.
Past/Present Clients: College Students at Oregon State University, various math people since college,
over 7,500 people on the PC from the US and rest the world.
**Publications**

My master's paper was published in the OSU journal.
The subject of it was Numerical Analysis used in shock waves and rarefaction fans.
It dealt with discontinuities that arose over time.
They were solved using the Leap Frog method.
That method was used and improvements of it were shown.
The improvements were by Enquist-Osher, Godunov, and Lax-Wendroff.
**Education/Credentials**

Master of Science at OSU with high honors in mathematics.
Bachelor of Science at OSU with high honors in mathematical sciences.
This degree involved mathematics, statistics, and computer science.
I also took sophmore level physics and chemistry while I was attending college.
On the side I took raquetball, but that's still not relevant.
**Awards and Honors**

I earned high honors in both my BS degree and MS degree from Oregon State.
I was in near the top in most of my classes. In several classes in mathematics, I was first.
In a class of over 100 students, I was always one of the first ones to complete the test.
I graduated with well over 50 credits in upper division mathematics.
**Past/Present Clients**

My clients have been students at OSU, people who live nearby, friends with math questions,
and several people every day on the PC. I would guess that you are probably going to be one more.