| Subject | Date Asked |
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| Abe, could you please help me with these problem I can't seem to get it right. | 8/13/2009 |
Q: Problem #1 Find the values of x and y that solve the following system of equations: -5x 7y = -14 ...
A: 1. -5x 7y = -14 & -6x 5y = 7...solve by "elimination"...multiply the 1st equation by -6 and the ...
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| Algebra-Quadratic Equations | 7/22/2009 |
Q: : I have no problem solving the equations but I am having difficulty with one of my problems: ...
A: I am not 100% sure I know what you want, but how about this... Suppose I want to construct a ...
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| algebra | 7/20/2009 |
Q: What are the asymptotes of the functions f(x)=4^x" and "g(x)=log5x?" Please explain. I do not have ...
A: f(x)=4^x simply means f(x), or y, is assigned a value for each x-value you can use. So, for ...
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| math | 7/19/2009 |
Q: Ako po ay perplexedly our pinagaaralan now to solve systems of Linear equations by eliminating ...
A: If we simply add the two, we will eliminate the y's: 4x=8, so x=2...now we can substitute x=2 into ...
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| Simultaneous Equations and the Physical World | 7/16/2009 |
Q: Solve the following systems of equations. 1. x-y=3 2x-y=-1 Answer: Show your work: 2. 2x+4y=10 ...
A: 1. x-y=3 ==> x=y+3, now substitute that into the other equation. .. 2(y+3)-y=-1 ==> 2y+6-y=-1 ==> ...
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| HELP! | 7/12/2009 |
Q: I have a few Algebra questions. I really need some help. 1. 2 binomial factors of 6s^2+40s-64 2. ...
A: 1. First look for common factor(s)...in this case a "2" .. ==> ...
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| algebra | 7/11/2009 |
Q: The points (1,3),(2,5),(8,17), (50,101) and (1000,2001) all lie on line M. The points ...
A: b) Simply find the equations of each line,, then solve to solve .. to see where they intersect. ...
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| Algebra | 7/10/2009 |
Q: Plot the graph of the equations 2x-3y=5 and 4x-6y=21. I can't remember how to solve these equations ...
A: You can plot linear functions by either expressing them in the form y=mx+b or simply finding two ...
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| algebra | 7/10/2009 |
Q: having to form equation for 2 lines. I have completed it for one of the lines, but having difficulty ...
A: All we need are 2 points on the line, so use any 2 of the 3 points. How about using the first 2: ...
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| Slope-Intercept Form and Perpendicular | 7/5/2009 |
Q: Write an equation in slope intercept form for a line that passes through the give point and is ...
A: Since y=3 is a horizontal line (with a zero slope), a perpendicular line to it would be vertical ...
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| linear equations | 7/2/2009 |
Q: a fruit grower has 200 acres of land available to raise two crops, A and B. It takes 1 day to trim ...
A: Let x=# of acres of Crop A ... y=# of acres of Crop B "<=" means "less than or equal to" x + y <= ...
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| Simple Algebra Question | 6/11/2009 |
Q: Abe- Hope all is well. My question will probally take you about 30 seconds to figure out. It is not ...
A: You have the right idea! We just need parentheses: (x-2)/x=0.991 Now multiply by x on both sides: ...
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| algerbra | 6/1/2009 |
Q: Tim and Tom mix 2 kinds of feed for pedigreed dogs they wish to make 22 pounds of feed worth .44 per ...
A: Let x=# of pounds of the cheaper feed used, so then 22-x=# of pounds of the other feed used (since ...
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| Right-Triangle Trigonometry | 5/31/2009 |
Q: I'm so sorry to keep asking so many questions, but I have no one else who can help me. I basically ...
A: No problem asking me! :-) You have a right triangle there, so you can use your right triangle ...
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| algebra | 5/30/2009 |
Q: we are doing co-ordinates of the points on a line graph.I an a little confused. The question is The ...
A: a) All we need are two points to determine a line. Let's use the - the first two: (1,3) & ...
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| Math | 5/29/2009 |
Q: By looking at an equation, how do you decide if it is a linear equation (graph is a straight line) ...
A: A linear equation is one that can be put into the following form: Ax + By = C ... i.e. the variables ...
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| Algebra 2 Questions | 5/27/2009 |
Q: Could you please help me with these problems? I have an idea of how to do these, but am not entirely ...
A: Wow, you have many questions there...looks like a HW list! How about I do 3 of them so you get the ...
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| Long Algebraic Method (square roots) | 5/24/2009 |
Q: I'm attempting to tutor a seventh grade student in finding the square root of large numbers using ...
A: Here are some links that should be helpful: http://math.arizona.edu/~kerl/doc/square-root.html ...
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| Linear/Graphing problems | 1/12/2009 |
Q: I have this question which I just can't figure out how they got the solution. Q. The equation of ...
A: Since we can express it as y=mx+b, we first need the slope... slope, ...
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| 7th grade algebra | 1/9/2009 |
Q: David started across a lake 15 miles wide in his fishing boat at 10 miles per hour. He had to row ...
A: Since distance = rate X time, we can set it up as follows: Let t = the total time the trip took, ...
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| Algebra | 1/6/2009 |
Q: I have one bucket and 2 faucets. One faucet can fill the bucket alone in 6 minutes. The other ...
A: Since work = (rate of work)x (time), we get: The rate of work for the first faucet is 1 bucket in 6 ...
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| algebra | 1/4/2009 |
Q: question factoring question 1 x2-6x-16=0 question 2 6x2+42x=0
A: I gather you mean by "x2" "x squared" - yes? It is usually written x^2. So... 1. x^2 -6x - 16 = ...
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| Algebra Distance Word Problems | 1/2/2009 |
Q: This is an example of the type of problem I'm having trouble with. I'm looking for more than just ...
A: Sorry to hear this problem, or ons like it, have been causing you so much grief! I hope I can help! ...
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| Area | 12/29/2008 |
Q: A spider web has an arc of a quarter circle and is 20 inches in length. Calculate area covered by ...
A: We need to know the radius of the arc...since it has a length of 20 inches, and we know it is 1/4 of ...
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| Pre-Cal | 9/1/2008 |
Q: Getting the zero of a function. 4X^3-24X^2-X+6
A: So, you want to solve 4X^3-24X^2-X+6=0... Factor by grouping: 4x^2(x-6)-1(x-6)=0 Now factor out the ...
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| algebra | 7/24/2008 |
Q: how can solve this : E like the greek symbole divided by square root of 10. E/V10
A: I do not understand the problem. What is "E" supposed to be? Do you mean "e" the base of the ...
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| Algebra | 7/23/2008 |
Q: I'm new to algebra, word problems are difficult for me to understand. Ex: Sally wishes to mix ...
A: Let x=the # of lbs of raisins needed, and let y=the # of lbs of granola needed. So... x+y=6, and ...
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| Algebra | 7/21/2008 |
Q: For all x>0 and y>0, the radical expression of the square root of x/3 square root of x- square root ...
A: I do not understand what you have written...is it supposed to be an equation? If so, there should ...
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| interval notation | 7/20/2008 |
Q: How do you know when to use interval notation for numbers on a number line? And when it is simply ...
A: Interval notation is used to spcecify a range of values, not just 1 or 2 values. For example: 1. ...
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| college algebra | 7/18/2008 |
Q: I'm not understanding factoring. My instructor wants us to factor these problems completely and I am ...
A: The first thing to look for when factoring is common factors. 1. x^10 y^3 - 4x^9 y^2 - 21x^8 y, ...
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| writing a system of equation | 7/15/2008 |
Q: How can i write a system of equation with a unique solution, an infinite number of solutions, and ...
A: 1. 9/15 = x/202, where x=the number infected out of the 202. -- solving for x: x=(9/15)*202=121.2, ...
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| 9 yr olds strange math questions | 7/12/2008 |
Q: my daughter wants to know,if your driving 60 miles per hour,or really any amount of mph, what is the ...
A: The speed problem is the easy one! :-) 60 miles/hour = 88 feet/sec, in case you want to know how to ...
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| Cost | 7/11/2008 |
Q: A square lot contains 54,756 square feet is to be enclosed by a close board fence 12 feet high. The ...
A: Hmm, $13 per THOUSAND board ft sounds rather unrealistic...perhaps it is $13 per thousand square ...
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| Solving a Pattern | 7/9/2008 |
Q: I am trying to solve the following pattern for y x y 1 8 2 14 3 4 24 5 28 I ...
A: Questions like these often have many different answers...there are lots of different functions that ...
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| linear equation in two variables | 7/8/2008 |
Q: I have a study question and I can't figure out how to approach solving it. I cannot get the correct ...
A: If we want the vertical line x=2 to be perpendicular to the segment, then the segment must be ...
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| Word Problem | 7/6/2008 |
Q: I am stuck on finding a formula to solve the following word problem: If Sam can do a job in 4 days ...
A: Since work = rate x time... The rate Sam can work is 1/4 (of a job/day), Lisa works at the rate of ...
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| algebra- absolutes | 7/5/2008 |
Q: I don't know how to make an absolute sign, so instead I'll use this: / OK? I don't know anything ...
A: You can use "| |" (i.e. the vertical bar for absolute value). It seems to me the problem you pose: ...
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| radical expressions | 1/18/2008 |
Q: How is adding radical expressions similar to adding polynomial expressions? How is it different?
A: It is similer in that you still have like terms: for polynomials, like terms have the same ...
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| algebra help | 1/14/2008 |
Q: i dont understand the elimination method at all.. i need help big time.! 2x-y=2 3x+4y=25
A: The elimination method requires that we multiply one or both equations by a non-zero number so that ...
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| algebra question | 1/13/2008 |
Q: can't figure out how to solve for X. a(x+c)=bx+d thanks
A: a(x+c)=bx+d, now distribute... ax+ac=bx+d, subtract bx from both sides to get ax-bx+ac=d, now ...
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| algebra | 1/12/2008 |
Q: My name is Diashamar. I would like to know how to solve the problem using the ...
A: The idea is to multiply one (or both) equation(s) by numbers so that when they are added together, ...
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| cost equation | 1/10/2008 |
Q: 1. In this problem, we will analyze the profit found for sales of decorative tiles. A demand ...
A: You have quite a few questions here! Please narrow it down some...perhaps only the most important ...
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| polynomials | 1/9/2008 |
Q: How do you determine if a polynomial is the difference of two squares?
A: You look for excactly "the difference of two square"... For example, x^2 - 25...notice that the ...
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| Linear Combinations | 1/8/2008 |
Q: I need help with this particular problem on my math homework! 5e + 4f = 9 4e + 5f = 9 Thank you!!
A: I gather the problem is to solve for 'e' and 'f'... One way is by "elimination"... multiply the 1st ...
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| synthetic divison | 1/2/2008 |
Q: hey im having alot of trouble with this problem. * means to the 3rd in the exponent and ^ means to ...
A: First, the common notation for exponentiation is: x^n = "x raised to the power of n" So, the ...
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| square root | 12/28/2007 |
Q: How do I find the square root of 1152?
A: Depends on what you are allowed to use. If a calculator, then use the "square root" key. If no ...
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| value definitions | 12/26/2007 |
Q: I am studying absolute value inequalities and am experiencing an embarassingly fundamental ...
A: I think the phrase: 'what real numbers are closer to 0 than 4 is?' is quite confusing! To explain ...
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| Algebra | 12/25/2007 |
Q: Simplify the radical:. 63xy11 /7xy Assume that all variables represent positive numbers. ...
A: I am not sure I understand...let me rephrrase it and tell me if it is what you mean. I will use the ...
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| Cost of equity w/flotation | 6/7/2007 |
Q: Javits & Sons common stock is currently trading at $30 a share. The stock is expected to pay a ...
A: Wow, I just found this question of yours from the summer! I had "been on vacation" from AllExperts ...
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| algebra question | 6/2/2007 |
Q: Explain how to find the coordinates of a point in the rectangular coordinate system.
A: Check these webaites: http://www.learningwave.com/lwonline/algebra_section2/alg_coord.html ...
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| travel problem | 5/31/2007 |
Q: I know the basic travel problem can be solved through d=rt, but I don't know how to solve the ...
A: Since the speeds are relative to the riverbanks the downstream average speed is 2.75 mi/hr, and the ...
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| problems graphing | 5/28/2007 |
Q: I need to solve each system by graphing for example 3x-6y=9 x-2y=3 and Find values for m and b in ...
A: 3x-6y=9 & x-2y=3 It is tough for me to show here how to solve this by graphing. I'll just briefly ...
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| Exponential problem | 5/24/2007 |
Q: Mantell, My problem is: I would like to be able to produce a list of numbers derived exponentially, ...
A: I think you want to use the sum of a geometric progression. A+Ar+Ar^2+...+Ar^n = A[1-r^(n+1)]/[1-r] ...
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| Zeros of a Function | 1/1/2007 |
Q: f(x)=-x^2+3x+6. I would greatly appreciate the help.Thanks.
A: The usual way is to factor, but since this doesn't factor so well, we just use the quadratic ...
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| Difficult Algebra Problems | 8/6/2006 |
Q: I'm hoping you could help me out with a few of algebra problems I am having difficulty with. I ...
A: a) I gather you mean the "square root"...yes? -- it can be written as: (w-3)^(1/2) = (4w+15)^(1/2) ...
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| Intermediate Algebra | 6/7/2006 |
Q: Help! I need Intermediate Algebra help. I would appreciate any help you can provide. I have ...
A: Check these links for how to use Cramer's Rule...it is tough for me to type all that and make it ...
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| circles | 6/6/2006 |
Q: rhombus ABCD is inscribed in a circle. what is the degree measure of arc AB? explain your reasoning.
A: The only rhombus that can be inscribed in a circle, and have all 4 vertices on the circle, is a ...
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| hello | 6/2/2006 |
Q: ma'am/sir, could you pls help me? i have just conducted my thesis and need to find some related ...
A: Not sure about web-sites...I suggest you ask in related newsgroups for highs school mathematics, ...
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| Algebra | 5/30/2006 |
Q: 1. The monthly revenue achieved by selling x boxes of candy is calculated to be $ x(5-0.05x). The ...
A: 1. Profit=Revenue-Cost=x(5-0.05x)-1.5x=3.5x-0.05x^2 -- which is maximized at ...
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| What is needed to know for 9th grade algebra etc. | 5/20/2006 |
Q: I would like to know what is required to know and what I will learn in the ninth grade algebra ...
A: Algebra is a generalization of arithmetic...so you need to know all your arithmetic very well...like ...
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| ALGEBRA | 1/8/2006 |
Q: 8k - 5n = 8r 3u + 2o = 189 5d + 2c = 6m 5L + 4m = 23b 3r - m = 3u 3k - 4i = 2i 3n - 3o = c o - c ...
A: What is the "answer" for each "letter"? I gather you are to take each equation and solve for a ...
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| Helping my daughter with math homework | 1/4/2006 |
Q: Plane A left the airport at 3:30 p.m. traveling west at 450mph. Plane B left the same airport at ...
A: Let t=the time, in hours, Plane B is in air. Thus, t+1.5=the time Plane A is in air. We want: ...
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| Algebra Equation | 1/3/2006 |
Q: I am trying to help my neice find the answer to this equation 3 1/3x + 1 5/6 =4 1/2, but I do not ...
A: I'd change the mixed numbers to improper fractions: 3 1/3x + 1 5/6 = 4 1/2 becomes (10/3)x + 11/6 = ...
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| finding the roots............... | 1/1/2006 |
Q: find all the roots of the equation: x^3-343=0 solve the following equation for x and y: ...
A: 1. x^3=343 ==> x=343^(1/3)=7[cos(2PI*k/3)+i*sin(2PI*k/3)], for k=0,1,2 ==> x= ...
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| Systems of Equations | 12/28/2005 |
Q: Which expression can be substituted for x in the top equation of the sytstem below to solve the ...
A: If we take the 2nd equation and solve for x, we get x=4y-4...then substitute that into the 1st ...
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| Simple equation needed | 9/19/2005 |
Q: I am looking for a simple equation. If I have 1,000,000 widgets and need to figure out how many ...
A: I gather you mean split up your 1,000,000 widgets into a 3 to 2 ratio...yes? If so, then we want ...
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| radius of a circle | 9/13/2005 |
Q: I have the chord length (84) and the height of the sector (11) but need the radius. I believe the ...
A: So, the formula is: c=sqrt[4h(2r-h)] So we square both sides: c^2=4h(2r-h) Distribute: c^2=8hr-4h^2 ...
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| inverse functions | 9/7/2005 |
Q: I am taking Calc. 1 and we just started. We are reviewing right now and I am having trouble ...
A: Sure...check these sites: http://www.purplemath.com/modules/invrsfcn.htm ...
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| why | 9/5/2005 |
Q: why abstract algabra is important? do it has real applecition?
A: What good is "Abstract Algebra"? At first, it may seem like this class is only an exercise in ...
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| algebra | 9/3/2005 |
Q: Write an equation using four 4's where the answer is 31. You may use any operation, parenthesis, ...
A: Here are some solutions: 1. ((4+sqrt 4)!+4!)/4!=31 2. 4!+(4!+4)/4 3. ...
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| two nearest number to ten thousand | 8/28/2005 |
Q: determine the two nearest number to 10,000, which are exactly divisible by 2, 3, 4, 5, 6, 7.
A: Al we need to do is check the multiples of 12*5*7=420 (since 12 is a multiple of 2,3,4 and 6) ...
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| algebra | 8/23/2005 |
Q: solve by elimination or substitution method? 2x-y+z = 10 x+2y-z = 12 x+y-2z = 6
A: The system can be solved either way... I'll use substitution only because it is easier to type. ...
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| Simultaneous Equations | 6/1/2005 |
Q: Please could you assist me in solving Simultaneous Equations, currently I have no idea how to do ...
A: Check these sites for help & examples: http://www.allaboutcircuits.com/vol_5/chpt_4/14.html ...
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| gold coin algebra/fraction problem help! | 5/27/2005 |
Q: I have a word problem I can't figure out... hank had to give a guard 1/3 of his coins to leave town. ...
A: I gather you mean that at each stage he gave that fraction of money he had left...yes? If so, then ...
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| given f(t)=(2t-3)^2 find the... | 2/2/2005 |
Q: given f(t)=(2t-3)^2 find the sum of all values t that satisfy f(t)=3/4. is the answer o?
A: We have: (2t-3)^2=3/4 ==> 4t^2-12t+9=3/4 ==> 16t^2-48t+36=3 ==> 16t^2-48t+33=0 ==> t^2-3t+33/16=0 ...
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| marcia Kleinz hikes down to... | 2/1/2005 |
Q: marcia Kleinz hikes down to the bottom of Bryce Canyon, overnight, and returns the next day. her ...
A: Seems to me there is not enough info! Here's is what I set-up: let x=the one-way distance t1=the ...
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| algerba | 1/30/2005 |
Q: could you please soleve this for me: 1/3x + 17y=43 10x+3/7y=32 i don't know where to start.
A: I gather the equations are: (1/3)x + 17y=43 10x+(3/7)y=32 ....Yes? If so, then we can solve either ...
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| help | 1/29/2005 |
Q: need help how many sides does a dodecagon have if it is regular what are the interior and exterior ...
A: 12 sides... the interior angle measure of an n-sided regular polygon is 180(n-2)/n degrees...so, ...
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| y-intercept | 1/26/2005 |
Q: Ok i have this really big math test tomorrow and i really need your help and fast! Please! Ok i need ...
A: I am not sure what you mean by "...take a whole number and turn it into a fraction so i can multiply ...
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| algebra | 1/23/2005 |
Q: what is the answer to n[n+11(y-1)]= and [n+(y-1)][n+10(y-1) please help i am really ...
A: What is the question? Simplify or solve? If solve, they are incomplete... If simplify, then: 1. ...
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| Linear Algebra | 1/19/2005 |
Q: We have this system, and we are trying to solve it. x+2y-z=2 2x+5y-3z=1 x+4y-3z=3 We have tried ...
A: What did your calculator give? What way(s) did you try? Gaussian elimination? Inverse matrix? This ...
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| a GRE question | 1/17/2005 |
Q: Average of Test Scores in Class R Average score for the boys 90 Average score for the girls 81 ...
A: Since the average for the class is closer to the average for the girls, there must be more girls in ...
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| Word Problem(Algebra 1) | 1/16/2005 |
Q: I'm having trouble answering this word problem. I hope you could help me sove it ASAP. I hope you ...
A: Let x=the number of 5 point questions, and y=the number of 2 point qustions. So, x+y=38 AND ...
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| Elimination method of solving a linear equation | 1/12/2005 |
Q: I am having trouble understanding how to solve linear equations by using the elimination method. I ...
A: We make the selection based upon which variables we select to eliminate and what the least common ...
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| Polynomial Long Division | 1/9/2005 |
Q: I'm having trouble with Polynomial Long Division, especially with this problem. How do you do it? ( ...
A: ..what is it?), Long division of polynomials is similar to ordinary long division. Here are some ...
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| algebra | 1/6/2005 |
Q: the dowry of francis wife is 100 aurie more than the property, the square of the dowry is 400 more ...
A: Let x=the dowry amount, y=property (value?) Thus, x=100+y and x^2=400+y^2 substituting x=100+y into ...
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| clearing equatioms | 1/4/2005 |
Q: i'm homeschooled and my mom doesn't know how to do algebra, i get the basics but i need help with ...
A: ..where are you from?), 1. x/2+x/3-x/4+3x/10-5x/12=7 the LCD (LCM of 2, 3, 4, 10, and 12) is 60 so ...
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| The substitution, addition, or subtraction method | 12/30/2004 |
Q: I have this problem that i could really use soem help with, I understand the problem but I dont ...
A: One way to solve this is to take one equation and solve for one of the variables, then substitute ...
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| Graphs | 12/27/2004 |
Q: 8. Your are shopping for cassettes and CDs. Cassettes cost $7, CDs cost $14, and you have $28 to ...
A: Let x=# of cassettes you buy & y=# of CD's you buy. Thus, 7x+14y=28 (assuming no tax, and you spend ...
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| d^2y/dx^2 = 2 which is positive... | 1/26/2004 |
Q: d^2y/dx^2 = 2 which is positive hence the turning point is a minimum, can you find the turning ...
A: a) I'll use 't' instead of '0'...so, x=t(6-t)=6t-t^2 dx/dt=6-2t=0 ==> t=3, with x''=-2, thus t=3 ...
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| Quadratic equations | 1/22/2004 |
Q: How do I start to solve the equation (7t + 6)^2 = 19
A: Two ways of doing this that are OK... 1. expand the left hand side to get: 49t^2+84t+36=19 then ...
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