| Subject | Date Asked | Expert |
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| algrebra!!! | 10/9/2008 | Richard J. Raridon |
Q: i need MAJor help trying to get... 0.3x+0.8y=3.6 These are partnered substituntion and ...
A: multiply the 1st eq. by 3 to get 0.9x+2.4y = 10.8 multiply the 2nd eq. by 8 to get 5.6x+2.4y = -45.6 ...
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| algebra-linear equations | 10/3/2008 | Richard J. Raridon |
Q: I have four problems that I cant figure out and need help with. 1. solve the system y=2x=3 y=4x=7 ...
A: 1. I presume you mean y=2x+3 and y=4x+7 so 2x+3 = 4x+7 giving you x = -2 and y = -1 2. multiply the ...
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| Percentages | 9/29/2008 | Richard J. Raridon |
Q: An investor has $1,000.00 to invest. He wants to invest one amount at 5% and another at 2%. What ...
A: You can either use substitution or addition and subtraction. In this case, I multiplied the 1st eq. ...
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| solving by substitution/algebra | 9/28/2008 | Richard J. Raridon |
Q: solving by substitution how do i solve 1/5x-3/8y=2 -5/6y+4=1/3x please respind as soon as ...
A: when you write 1/5x it looks like you could be dividing 1 by 5x. for clarity, you should write ...
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| College Algebra 116 | 9/24/2008 | Richard J. Raridon |
Q: 1. The perimeter of a rectangle is 126 m. The length is 6 m more than twice the width. Find the ...
A: 1. a. 44m, b. 19m 2. a. 36, b. 54 3. If your equation is correct, t has to be between 1 and 9 ...
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| algebra | 9/24/2008 | Richard J. Raridon |
Q: Help! I am trying to help my 10th grader with her homework and we can't figure this out. An ...
A: S(t) = -30|t-6.5|+105 t = 3 to 10 I can't graph it for you but you can do it. Simply put in a value ...
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| slope intercept corrections please | 9/22/2008 | Richard J. Raridon |
Q: what is the slope intercept form of the equation of a line that passes through (4,-6) and (3,2) ...
A: 1. y = -8x+26 2. y = (1/4)x+5/2 or 4y = x+10 3. f(-2) = 17/5 4. Those are both straight lines which ...
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| slope intercept | 9/22/2008 | Socrates |
Q: what is the slope intercept form of the equation of a line that passes through (4,-6) and (3,2)
A: slope = (-6 - 2) / (4 - 3) = -8/1 = -8 y = mx + b is the slope intercept form where m is the slope ...
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| Graphs | 9/21/2008 | Socrates |
Q: A graph passes through the points (0,a) , (b,c) , and (d,e) (b,c) is the vertex. What is its ...
A: The graph looks like a parabola , so suppose the equation is y = rx^2 + sx + t We must figure out ...
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| out of this world desperation !! | 9/18/2008 | Richard J. Raridon |
Q: my name is sammy. im 17 and a aenior in highschool. i am so desperate for how to solve these ...
A: The easiest way to solve is using calculus but you can do it just using algebra. simply calculate ...
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| College Algebra | 9/12/2008 | Richard J. Raridon |
Q: I have like 13 questions i need help with so here they go. 1. In 1991 the life expectancy of males ...
A: 1. E(t) = 70.1+0.625t, E(16) = 80.1 2. y = (4/9)x -50/9 3. S(x) = 272000+109800t where t = years ...
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| algebra word problem | 9/11/2008 | Richard J. Raridon |
Q: The Holiday Hotel has bedbugs. A single bed has 7 bedbugs and a double bed has 13 bedbugs. If there ...
A: This is known as an indeterminate equation since there more unknowns than equations. However, you ...
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| algebra | 9/10/2008 | Richard J. Raridon |
Q: homework for slightly behind 11yr old so basic as poss please:could you simply explain the basics of ...
A: Algebra is the study of numbers, all numbers, positive and negative, whole numbers and irrational ...
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| math | 9/3/2008 | Richard J. Raridon |
Q: What is the shortest distance between the point (5,2) and the line y=2x+3? Also, find the ...
A: First you have to find the equation of the line perpendicular to y=2x+3 and going through (5,2). ...
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| subject of a formula | 9/2/2008 | Richard J. Raridon |
Q: please help me i need answers to 4 questions. 1) S=wd/h(h-d/2) make h the subject 2) I=E/root ...
A: 1) Sh/(wd) = h-d/2 Sh/(wd)-h = -d/2 h = (-d/2)/[S/(wd) -1] 2) (R^2+w^2l^2)^1/2 = E/l R^2+w^2l^2 = ...
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| Pre-Cal | 9/1/2008 | Abe Mantell |
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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| quadratic equation | 8/26/2008 | Richard J. Raridon |
Q: We were given a sample equation and was told that the method to solving quadratic equations came ...
A: First of all, it should be x^2+3x-10=0 Step 1 - x^2+3x = 10 Step 2 - 4x^2 +12x = 40 Step 3 - 4x^2 ...
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| Algebra | 8/21/2008 | Socrates |
Q: How do you simplify problems like this one: (^ means exponent) x^7 - x^5 i have the answer but dont ...
A: Factor out the highest power of x x^7 - x^5 = x^5 ( x^2 - 1) For the second problem, start by ...
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| Applied Algebra | 8/3/2008 | Richard J. Raridon |
Q: I am completely unable to learn through memorization. I have failed Algebra 1, and algebra 2 far ...
A: There are various study guides available in book stores such as the Schaum series. I've never ...
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| Dimensions | 7/31/2008 | Richard J. Raridon |
Q: A town consumes 145,000,000 gallons of water per day. This amount of water is collected in a ...
A: Since you didn't give the depth of the pond or whether it is round or square, I have to make some ...
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| algebra | 7/29/2008 | Richard J. Raridon |
Q: Can you show me how to do this please? Plot the graphs of the following functions 1. f(x)=7x ...
A: I cannot graph them for you but it's simple to graph them. The first three are straight lines and ...
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| simplifying fractional equations | 7/27/2008 | Richard J. Raridon |
Q: knew this 36 years ago in high school darn. won games plus (how many more) divided by total games ...
A: 1) I assume you want to solve for X. So multiply each term by T to get wT +X +XT = PT, then X = ...
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| algebra | 7/24/2008 | Abe Mantell |
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 | Abe Mantell |
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 | Abe Mantell |
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 | Abe Mantell |
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 | Abe Mantell |
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 | Abe Mantell |
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 | Abe Mantell |
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 | Abe Mantell |
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 | Abe Mantell |
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 | Abe Mantell |
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 | Abe Mantell |
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 | Abe Mantell |
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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| Algebra | 7/2/2008 | Joe Engels |
Q: Paula has a $1.50 in nickels and dimes. The total number of coins she has is 18. How many of each ...
A: X = # of Nickels and Y = # of Dimes (Equation 1) X + Y = 18 (Equation 2) X*.05 + Y*.1 = 1.50 ...
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| Algebra | 6/25/2008 | Richard J. Raridon |
Q: a man dies and leave his estate to his heirs. The estate is divided as follows. 1st son gets 100 ...
A: Let E = amt. of estate 1st son gets 100+(1/10)(E-100) = E/10 +90 2nd son gets ...
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| elimination method | 6/25/2008 | Richard J. Raridon |
Q: I am an older student and while the younger whipper snappers are doing this really fast I am going ...
A: from the first eq. W = (3Z+1)/2 put that into the second eq. to get 3(3Z+1)/2 +4Z = 24. multiply ...
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| Polynomials and Binomials | 6/24/2008 | Richard J. Raridon |
Q: What is polynomial divison and can you give me a real life example? This all seems confusing. Also, ...
A: Suppose you want to divide 2x^3+3x^2-11x-6 by x+3. It's very similar to long division. You look at ...
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| Exponents | 6/24/2008 | Richard J. Raridon |
Q: Can you please explain the different rules of exponents. I am having a hard time understaing them. ...
A: first of all you can write exponents as x^2, y^1/2, z^3, w^5/3, etc. 1/x^2 = x^-2, a negative ...
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| Finding zero's algebraically | 6/22/2008 | Richard J. Raridon |
Q: I dont know why, but im totally stomped on this one. find the zeroes of the function ...
A: 1. x = 4,7,-7 2. f(x) = (x-6)(x^2+4x+6)+4 3. 305 4. x=3,-3,-5 5. f(x) = (x+3)(x+2)(x-1) 6. I don't ...
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