You are here:
- Home
- Science
- Math for Kids
- Algebra
Algebra/Questions
| Subject | Date Asked | Expert |
| Math | 1/20/2012 | Suresh Chandra Benjamin |
| Q: What is the equation of the line containing the point 3,7 and parallel to y =2/3-2 A: May I consider your question as this : what is the equation of a line containing (3,7) and parallel ... | ||
| College algebra | 1/19/2012 | Socrates |
| Q: 45-[4-2y-4(y+7)] = -4(1+3y)-[4-3(y+2)-2(2y-5)] having trouble getting the answer to this problem. A: Eliminate the innermost (round) brackets first 45-[4-2y-4(y+7)] = -4(1+3y)-[4-3(y+2)-2(2y-5)] = ... | ||
| word problems | 1/17/2012 | Abe Mantell |
| Q: if 17 girls can plant 51 trees in a day. how many trees could 26 girls plant in an hour? A: 17 girls planting 51 trees in one day ==> 1 girl can plant 51/17 = 3 trees per day. Now divide that ... | ||
| extra credit | 1/16/2012 | Scott A Wilson |
| Q: this is Megan, I need some help with this extra credit problem below: Fifty percent of what number ... A: Lets start with 10. It is known that 60% of 10 is 6, so 6 more than 10 is 16. Now 25% of 16 is 4, ... | ||
| rectangle | 1/16/2012 | Scott A Wilson |
| Q: Area of a rectangle is 50m2 Diagonal is 10m Perimeter? A: All measurements are in meters, so I'll just use numbers. The area is 50 and the diagonal is 10. If ... | ||
| Word Problem | 1/16/2012 | Frederick Koh |
| Q: can you please show the process for the following problem: A wrecking ball suspended from a chain ... A: log (base: x+3) [(x^3+x-2)/x]=2 log (base: x+3) [(x^3+x-2)/x ]=2 log (base: x+3) (x+3) [ ... | ||
| Can you please help me with this word problem | 1/15/2012 | Richard J. Raridon |
| Q: Given the length and width (in feet and inches) of a rectangular room and the price per square yard ... A: 1. length and width, cost per sq. yard, 6.5% tax 2. square yards, cost of carpet, amt. of sales tax, ... | ||
| Algebra I/Elimination using Multiplication | 1/10/2012 | Abe Mantell |
| Q: I'm stumped on a word problem with elimination using multiplication. It's adding in percents and ... A: This can be done with only one variable, but since you mentioned elmination, I gather you need to ... | ||
| Algebra | 1/10/2012 | Scott A Wilson |
| Q: I have the followingIs the following equation unique: A**n + B**m = C, where A, B,C, n and m are ... A: Perhaps if we take 36, which is 6^2. It is known that 3^3 + 3^2 = 27 + 9 = 36. It is also known that ... | ||
| Algebra/Trigonometry | 1/8/2012 | Frederick Koh |
| Q: Topic: Solving Exponential Equations and Inequalities Can you please show me the process to attain ... A: (A) (1/2)^(4x+1)=8^(2x+1) (2^-1)^(4x+1)= (2^3)^(2x+1) 2^(-4x-1)=2^(6x+3) [ ... | ||
| Algebra | 1/8/2012 | Scott A Wilson |
| Q: I have the followingIs the following equation unique: A**n + B**m = C, where A, B,C, n and m are ... A: I found some examples using Excel. Take 2^3 + 3^2 and that is 8+9=17. Take 1^4 + 4^2 and that is ... | ||
| Algebra | 1/6/2012 | Scott A Wilson |
| Q: I have the followingIs the following equation unique: A**n + B**m = C, where A, B,C, n and m are ... A: If we have A, B, n, and m as 1, 1, 1, 1, then 1^1 + 1^1 = 2, and that's C. In fact, if they are 1, ... | ||
| math | 1/6/2012 | Frederick Koh |
| Q: a man rowed 30 km downstream. it took him 2 hours more time in going back than in going downstream. ... A: Let his speed in still water be x kph Then his speed going downstream = x+2 (since he is going with ... | ||
| Quadratics | 1/6/2012 | Abe Mantell |
| Q: I've got a test for quadratics in a few days, and I don't understand the homework we are doing ... A: The equation governing the motion of an object subject to acceleration is: y(t)=(1/2)at^2+vot+yo, ... | ||
| Polynomial expressions | 1/6/2012 | Scott A Wilson |
| Q: I don't know how to solve these problems and my hw is due tomorrow - and it's 8 o'clock! The first ... A: Note that the (4m-9) is just 4m-9 and that -(6m+4) is -6m-4. This gives 4m - 9 - 6m - 4. Grouping ... | ||
| Algebra woes. | 1/5/2012 | Abe Mantell |
| Q: 1.) List the possible rational roots of the following equation: 5x4 + 9x3 + 5x2 + 2x + 4 = 0 ... A: The rational root theorem tells us that the possible rational roots of a polynomial with integer ... | ||
| 7th grade algebra | 1/5/2012 | Bobby Soltani |
| Q: If you have the area of a circle how would you find the diameter? A: The area of a circle is pi times its radius squared, or A = pi*(r)^2. The radius of a circle is one ... | ||
| algebra2 | 1/5/2012 | Richard J. Raridon |
| Q: 1. Simplify, arrange the terms in order of decreasing degree of x and find the degree of the ... A: 1. 5x^2+3x-7 2. 2x^2yz^2 3. 3n^2-n+5 4. 4a^2+5ab 5. -25 6. 24a^2-ab+30b^2 7. f(x)=x+5 8. y = (-2/3)x ... | ||
| algebra2 | 1/4/2012 | Richard J. Raridon |
| Q: 13. Determine the range for: g(x) = 1/2(6 + x)(4 + x) 14. Determine the range for: f(x) = 4(x - ... A: 13 & 14. i didn't learn about ranges when I took algebra 65 years ago 23. (x-1/2)^2 = (5/4)(y+5) 24. ... | ||
| algebra 2 | 1/3/2012 | Richard J. Raridon |
| Q: In triangle ABC, c = 10 and Ð A = Ð B = 40°. Find the length of the median to segment AC. 8.3909 ... A: Here's some of them that I had time for. 1. I get 7.42 2. 4.13 hours 3. 388 ft 4. 10.5 (not ... | ||
| algebra2 | 1/3/2012 | Richard J. Raridon |
| Q: 1. Solve: n4 - 2n2 - 8 = 0 n = ±4 n = ±2 n = ±4 or ±2 n = ±1.41i or ±2 2. Solve: c3 + c2 - 7c ... A: You could have saved me some time by labeling your answers a,b,c,d 1. n = +/-1.41i, +/-2 2. c = ... | ||
| Pi | 12/31/2011 | Abe Mantell |
| Q: I don't know if you're the right person to ask but please could you help with this or let me know ... A: I think you mean "is pi still irrational (not perfect) if expressed in another base"...yes? A ... | ||
| Algebra/Trigonometry | 12/27/2011 | Frederick Koh |
| Q: Topic : Rational Exponents I need to write each expression in radical form, or write each radical ... A: A) ³√6x^2/³√5y = [³√6x^2*(³√5y )^2]/ [(³√5y) *(³√5y )^2] ... | ||
| Algebra/Trigonometry | 12/27/2011 | Frederick Koh |
| Q: Topic : Rational Exponents I need to write each expression in radical form, or write each radical ... A: A) ³√5xy^2 = (5xy^2)^ (1/3) = 5^(1/3) x^(1/3) y ^[2*(1/3)] = 5^(1/3) ... | ||
| Algebra/Trigonometry | 12/26/2011 | Frederick Koh |
| Q: Topic: Using a conjugate to rationalize a denominator. Can you please show me the process to attain ... A: I will put this in greater detail for your understanding: (5√2 -15)/ (-7) = (+5√2 ... | ||
| Algebra/Trigonometry | 12/25/2011 | Frederick Koh |
| Q: Topic: Using a conjugate to rationalize a denominator. Can you please show me the process to attain ... A: 1) (4 + √2)/(√2 -3) = (4 + √2)*(√2 +3)/ (√2 -3)*(√2 +3) ... | ||
| converting a word problem to linear programming matrix | 12/23/2011 | Frederick Koh |
| Q: A glass manufacturing company uses two types of raw materials (type A sand and type B sand) to ... A: If you wish to employ the north west corner method, certain information is missing from your given ... | ||
| algebra II | 12/23/2011 | Richard J. Raridon |
| Q: Find the distance between the pair of points: (9, 1) and (2, -1) d = 9.9 d = 7.28 ... A: It would have been quicker to answer if you had labeled your answers a),b),c),d) 1. d=7.28 2. d = ... | ||
| Algebra | 12/21/2011 | Scott A Wilson |
| Q: if x-(1/x)=3 ; now x+(1/x)=? A: Take x - 1/x = 3 and multiply by x, giving x² - 1 = 3x. Subtracting 3x from both sides gives x² - 3x ... | ||
| ALGEBRA II I DESPERATELY NEED HELP BY TONIGHT. | 12/17/2011 | Scott A Wilson |
| Q: I need major help with algebra. I'm doing a project in which I have to create a quadratic equation. ... A: Sorry the answer is so late and I'm not even sure this is on time, but that equation looks correct. ... | ||
| Multinomial theorem | 12/15/2011 | Frederick Koh |
| Q: Sir plzz tell me how to find coeffecients of terms of multinomial expansion and how to find the no. ... A: Sorry but you are not making things any clearer. If you are intending to enquire about how to find ... | ||
| algebra | 12/13/2011 | Frederick Koh |
| Q: 15.For the given vertices what type of triangle is formed: Vertices: A(4, -5), B(-2, -8), C(-8, 4) ... A: 15. If you plot out the coordinates, you will get a <b> right angle triangle </b> where angle ABC is ... | ||
| Linear system of equations | 12/13/2011 | Frederick Koh |
| Q: Suppose that in one week, your company takes in $2,220 in sales at one of its cell phone stores. The ... A: a. Let the quantity of cellphones (A4 model) sold be x. Let the quantity of smartphone (Z20 ... | ||
| Linear System of Equations | 12/13/2011 | Suresh Chandra Benjamin |
| Q: Suppose that in one week, your company takes in $2,220 in sales at one of its cell phone stores. The ... A: Here are the simultaneous equations : x + y = 51 ............ (1) 35 x + 50 y = 2220 ........ (2) ... | ||
| Multinomial theorem | 12/13/2011 | Frederick Koh |
| Q: Sir plzz tell me how to find coeffecients of terms of multinomial expansion and how to find the no. ... A: your question is rather vague. You did not mention the dimension of the multinomial distribution, ie ... | ||
| math | 12/12/2011 | Frederick Koh |
| Q: Mrs. Sanchez invested a part of Php 30,000.00 at 10 % and the remaining money at 20 % per annum. If ... A: Let amount invested at 10% interest be x, then amount invested at 20% interest=30,000-x Since income ... | ||
| Linear equations | 12/12/2011 | Frederick Koh |
| Q: I'm not sure about how to solve thisThe line connecting A (-18, 8) and B (-10, -8) is divided in the ... A: Using the concept of vectors to solve this would be extremely efficient. Let the coordinates of C be ... | ||
| Algebra/Trigonometry | 12/11/2011 | Frederick Koh |
| Q: United States, High School- Grade 9. I am not quite sure with the result I got for this problem. ... A: (a) (3a)^2(7b)^4 = (3a)^ 2 (2401 b^4) (Note that 7^4= 2401) = ... | ||
| math | 12/10/2011 | Frederick Koh |
| Q: sir how many natural numbers can be formed lying between 1000 and 10000 out of the digits ... A: Numbers that are divisible by 2 or 5 must end with the digits 0, 2 or 5. For a 4 digit number XXXX ... | ||
| math | 12/8/2011 | Frederick Koh |
| Q: sir how many natural numbers can be formed lying between 1000 and 10000 out of the digits ... A: For this particular question, observe that all possible natural numbers which can be considered ... | ||
Algebra
Answers by Expert:
Frederick Koh
Top Expert on this page
Expertise
I can answer questions concerning calculus, complex numbers, vectors, statistics , algebra and trigonometry for the O level, A level and 1st/2nd year college math/engineering student.
Experience
3 years helping out in a singaporean youth forum: http://forums.sgclub.com/math_help/ (under the moniker whitecorp)
You can also visit my main maths website http://www.whitegroupmaths.com where I have
designed "question locker" vaults to store tons of fully worked math problems.
Peace.
Organizations
IEEE(Institute of Electrical and Electronics Engineers )
Education/Credentials
Former straight As A level student from HCJC (aka HCI); scored distinctions
in both C and Further Mathematics
B Eng (Hons) From The National University Of Singapore (NUS)
©2012 About.com, a part of The New York Times Company. All rights reserved.