| Subject | Date Asked | Expert |
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| Algebra | 11/15/2009 | Brian Davidson |
Q: I need a real life application of a linear function. I need to state the application, give the ...
A: Debby, Good question. A useful real-world application has to do with a falling object. Consider a ...
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| ap calculus ab | 11/12/2009 | Brian Davidson |
Q: my problems (set 3): In Exercises 4 and 9, find dy/dx. Use your grapher to support your analysis if ...
A: Asad, Here are my solutions. In case any of my solutions seem confusing, please feel free to ...
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| ap calculus ab | 11/10/2009 | Brian Davidson |
Q: my problems (set 2): In Exercise 19 find dy/dx. 19. y=(x+1)(x+2)/(x-1)(x-2) 20. Use the definition ...
A: Asad, Good questions. Here are my solutions: 19. I would multiply the numerators and ...
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| ap calculus ab | 11/8/2009 | Brian Davidson |
Q: my problems (set 1): In Exercises 16, 17, and 18 find dy/dx. 16. y=(1-x)((1+x²)^-1) 17. ...
A: Asad, My sincerest apologies. Now you see what happens when I answer questions at 3am! :) For ...
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| ap calculus ab | 11/8/2009 | Brian Davidson |
Q: my problems (set 1): In Exercises 16, 17, and 18 find dy/dx. 16. y=(1-x)((1+x²)^-1) 17. ...
A: Asad, Here are my solutions: For many of these problems, we must recall the quotient rule. The ...
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| ap calculus ab | 11/6/2009 | Brian Davidson |
Q: my problems (set 2): For Exercises 9, 10, 11, 12, 13, 19, 21, 22, 23, and 24 find the derivative of ...
A: Good questions. I am more than happy to answer all of them (that's what I am here for!), but please ...
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| ap calculus ab | 11/3/2009 | Brian Davidson |
Q: my problems (set 1): In Exercises 4, 6, 10, 15, 17, 18 use the result of these problems to find ...
A: These questions, I believe, can all be answered with the use of either the product or quotient rule. ...
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| ap calculus ab | 10/30/2009 | Brian Davidson |
Q: My Problems (set 2): [DN1] Find the slope of y=3x² at the point (-2, 12). [DN2] How many vertical ...
A: Asad, For problem #1, we recall the formula for the derivative of an exponential function. The ...
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| math question | 10/27/2009 | Anil |
Q: the length of a rectangle is L. The width is one more than 3 times the length. Find the area of ...
A: Area of a rectangle = Length X Width In this case, Length = L 3 times the Length is = 3 X L = 3L ...
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| ap calculus ab | 10/27/2009 | Brian Davidson |
Q: My Problems (set 1): 22. In Exercise 22, find the formula for the slope of the graph. Use the ...
A: Asad, 22. The function is g(x) x^3. To find the slope of the graph, we must find the formula for ...
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| area of triangles and irregular shapes | 10/23/2009 | silly_dreamer |
Q: I am trying to figure out the area of different triangles and irregular shapes. A regular shape is ...
A: Sorry it's taken me a while to get back to you. I've been sick and unable to access my computer. ...
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| dump it | 10/21/2009 | silly_dreamer |
Q: 1, mark was clearing out his old books and comics. he dumped half of them. he gave half of what was ...
A: Vicky, These are my favorite types of questions. Questions that require problem solving skills. ...
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| urgent math | 10/21/2009 | Brian Davidson |
Q: I REALLY need to know how to go about finding the inverse of a transcendental function. I have no ...
A: Rick, Great question...The equation you mentioned does not have an inverse in terms of ONLY ONE OF ...
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| math | 10/19/2009 | Brian Davidson |
Q: sin(A+B)=sinA cosB+cosA sinB sir please explain it graphically
A: Pratap, Thanks for your question. Without a way of drawing a picture for you, it is very difficult ...
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| ap calculus | 10/14/2009 | Brian Davidson |
Q: My problems (set4): [Ex.6] Find the limit of (3-Radical(x+5))/(x-4) as x approaches 4. 1. Find the ...
A: Asad, Ex #6: I assume that in example #6, the (x-4) is not under the radical? Iam also assuming ...
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| algebra | 10/13/2009 | silly_dreamer |
Q: The width of a rectangle is one half its length. The perimeter of the rectangle is 54cm. What are ...
A: Sorry it took so long for a response. I typed up an answer to this question, but it must not have ...
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| ap calculus | 10/11/2009 | Brian Davidson |
Q: I am 16 and in 12 grade of high school My problems (set 3): 9. Find the slope-intercept form of the ...
A: Asad, Thanks for your questions. My answers are below-- Feel free to reply again if there is ...
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| Least common multiple | 10/10/2009 | silly_dreamer |
Q: Find LCM of 70 & 98?
A: Sorry it took me so long to get back to you. I've been having internet issues. There are several ...
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| LCM or HCF | 9/16/2009 | Anil |
Q: I need to explain the calculation for the smallest 4 digit number that is divisible by 18,24 & 32. I ...
A: take the biggest number 32 and get multiples of that number since you want 4 digit mutiple divide ...
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| Mean & Range | 9/13/2009 | John Zalewski |
Q: My name is Morven i am not home schooled, but i am still finding Mean & Range rather ...
A: Morven. The mean is simply the average for a set of numbers. For your question, the mean for A, B, ...
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| 8th grade Ratio Strategies | 9/6/2009 | Anil |
Q: I have searched the internet and can not find a site that can help. I need to explain how to work ...
A: If you are can solve it with fractions, I guess you already know the underlying theory. When you are ...
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| 8th grade Ratio Strategies | 9/6/2009 | silly_dreamer |
Q: I have searched the internet and can not find a site that can help. I need to explain how to work ...
A: Fractions are certainly the easiest way to do it. As long as the fractions are set so the ...
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| 8th grade Ratio Strategies | 9/6/2009 | silly_dreamer |
Q: I have searched the internet and can not find a site that can help. I need to explain how to work ...
A: I'm not positive what you're asking. As an eighth grade math teacher, I teach my students to solve ...
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| Pre-Algebra | 9/4/2009 | silly_dreamer |
Q: Having a problem understanding how to solve this complex fraction: 2/3-1/6 / -3/4-1/2...can you ...
A: From what you wrote, the complex fraction reads, in words, two-thirds minus one-sixth divided by ...
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| pls.answer this | 8/31/2009 | Brian Davidson |
Q: what is the meaning of LCM?
A: Great question! "LCM" stands for the "Least Common Multiple". Any two numbers have a ...
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| 8th grade math | 8/26/2009 | Anil |
Q: My daughter brought home a math paper over rational numbers. Not sure how to change the decimal to ...
A: Before I tell you how to convert a decimal number to a fraction, lets do some recap. Rational ...
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| algebra help please | 7/12/2009 | silly_dreamer |
Q: I'm completely lost on these two problems. Please help in any way you can! 18. Solve: k/k+1 + ...
A: These problems look harder than they are. Let's first think about a problem like 1/3 + 1/7. To get ...
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| algebra | 6/2/2009 | John Zalewski |
Q: My name's Danielle and I'm having some trouble on my homework. I was wondering if you could help. ...
A: Danielle. For the first question, you'll notice a pattern. A+B = 1+-2, which is -1. -1 + C (3) = 2, ...
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| Algerbra | 5/19/2009 | silly_dreamer |
Q: Jenny wants to utilize a portion of her garden for growing flowers. Being a designer herself, she ...
A: This is a problem where it seems like we would use inequalities. It's actually not. What we're ...
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| Question! | 5/8/2009 | Anil |
Q: Should I tell my techer about it though,she's understand?
A: I don't see any harm in telling the teacher. But again, my message to you would be "Continue to be ...
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| Question. | 5/7/2009 | Anil |
Q: I have a math question.I am in the 8th grade,A/B student,only 5 b's this year, but I forgot how to ...
A: Since you did not give her the permission to copy you have not done anything that amounts to ...
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| pre- algebra | 4/29/2009 | silly_dreamer |
Q: teacher goes threw these pronlems so fast i can loose my head but heres the problem: 1. 3x-5=2(2x+5)
A: The goal here is to isolate the variable to one side of the equation. We must be careful to follow ...
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| Question. | 4/26/2009 | eileen |
Q: I have a math question.I am in the 8th grade,A/B student,only 5 b's this year, but I forgot how to ...
A: Hey, I am sorry I answered so late, percent of increase = (new amount - original amount)/ original ...
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| Question. | 4/26/2009 | Anil |
Q: I have a math question.I am in the 8th grade,A/B student,only 5 b's this year, but I forgot how to ...
A: This is how you would approach the problem: Examine the given data Population in 1990: 207619 ...
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| Question. | 4/26/2009 | silly_dreamer |
Q: I have a math question.I am in the 8th grade,A/B student,only 5 b's this year, but I forgot how to ...
A: Sorry it took some time to get back to you. My internet's been out all weekend. Congrats on the ...
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| Word problem | 4/25/2009 | Anil |
Q: Could you please check my work and explanation for this word problem? Erin's average for six math ...
A: I am guessing it is too late for you to get this reply. But I will reply anyway. Lets the score in ...
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| Card Word Problem | 4/24/2009 | eileen |
Q: How many cards must be drawn from a standard 52-card deck to be certain that at least two cards ...
A: Hey! Ok to answer this problem draw a model. Draw four suits SUIT 1 SUIT 2 SUIT 3 SUIT ...
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| Length and width | 4/19/2009 | silly_dreamer |
Q: My name is Tyler. I am in 8th grade and in Algebra 1. I need help on this question. The length Of ...
A: Hey Tyler, I love these kinds of questions and it's great that you already have the perimeter ...
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| Alegbra - length of a rectangle | 4/3/2009 | Anil |
Q: I haven't done math in a long time and I'm trying to help out my wife with her math homework for ...
A: You have it right. In fact I am surprised that you solved it quite well and still wanted to ask me ...
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| Home-schoolers do it a bit different... | 3/10/2009 | John Zalewski |
Q: Mr. Zalewski. My name is Emily and I'm an eighth grade home-schooler. I've been home-schooled all ...
A: Emily. Basically, pi = 3.14, r is the radius, h is the height, B is the base, l is the length, and ...
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