| Subject | Date Asked |
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| Process to solve for q? | 11/22/2009 |
Q: 2q^2-20q=1000/q What is the process to solve such equations for q?
A: The first thing you can do is divide by 2 to get q^2-10q = 500/q Next, multiply each term by q to ...
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| algebra 2 | 11/17/2009 |
Q: Write in exponential form: 1. ln 100 = 4.61 2. ln 1/e2 = -2 Write the equation in logarithmic form: ...
A: Here's some of your answers 1. e^4.61 = 100 3. ln(1097) = 7 ln8 -ln2 = ln4 ln7 +0.5ln9 = ln(21) ...
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| Algebre - Parabolas | 11/17/2009 |
Q: I need to find the vertex, the axis of symmetry and the direction in which the parabola opens and to ...
A: The easiest way to answer your questions is to plot the parabola. For y = 0, x = -3 Put in y = +/- ...
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| ap calculus ab | 11/11/2009 |
Q: I am 16 years old and in 12th grade in high school. my problems (set 3): In Exercises 4 and 9, find ...
A: 4. sec(x)+xsec(x)tan(x) 9. -csc^2(x)/[1+cot(x)] -csc^2(x)cot(x)/[1+cot(x)]^2 11. y = -x+3+(pi) 13. ...
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| y=mx+b | 11/10/2009 |
Q: how do you plot y=1/4x + 6?
A: First of all, to avoid confusion, you should write it y = (1/4)x+6 That's the equation for a ...
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| Equation of a Parabola | 11/9/2009 |
Q: I need some help trying to figure this out. I'm going back and taking a college algebra class after ...
A: For a cannon, the range R = V0^2sin(2A)/g and the height h = V0^2sin^2(A)/(2g) where V0 is the ...
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| factoring a polynomial | 11/8/2009 |
Q: I have to factor this polynomial: x^5-5x^4+8x^3-21x^2+45x Im stuck on what steps to take to factor ...
A: You can write it f(x) = x(x^4-5x^3+8x^2-21x+45) If x is a solution, then f(x) = 0. You can see ...
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| Algebraic Fractions | 11/7/2009 |
Q: Good Afternoon, I'm an older working mom planning on returning to school next Spring, and I am ...
A: I'm older than you but you don't need to call me sir. Your corrected problem looks exactly like ...
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| ap calculus ab | 11/4/2009 |
Q: I am 16 and in 12th grade in high school. my problems (set 2): For Exercises 9, 10, 11, 12, 13, 19, ...
A: 9. (1/a)[(1/b)(2x) -(2/a) +d/x^2] 10. 64x^-9 +6x^-1/2 11. 42x^-8 +2x^-1/2 12. -5x^-6 -8x^-9 13. ...
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| ap calculus ab | 10/30/2009 |
Q: I am 16 and a senior in high school. My Problems (set 2): [DN1] Find the slope of y=3x² at the point ...
A: I've never seen these questions before DN1 - ...
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| Quadratic Equations | 10/28/2009 |
Q: I have trouble solving quadratic equations that have a coefficient in front of the x[squared] ...
A: well, you can cancel out 2 to get 2x^2 +5x -3 = 0 and then you might see that you can factor it to ...
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| collage algebra | 10/21/2009 |
Q: !! I'm Leih Marie a 1st year collage student. Please help me solving this problem?? my brain was ...
A: Do you consider that all one problem? Let's look at it in parts 4/x -(6x+9)/(1+x) = [4(1+x) ...
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| sketching a graph | 10/19/2009 |
Q: I've tried to sketch a curve but it doesn't seem to come quite right, but I'm sure all my ...
A: I don't know exactly what you did but you didn't get the x-intercepts right. You get them by ...
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| Math | 10/19/2009 |
Q: I just don't know where to start on these questions just some advanced questions that I didn't have ...
A: 1) that's dishonest to include four decimal places when the information is only given to one decimal ...
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| equation involving rational expression | 10/15/2009 |
Q: Aack! I am a homeschooling mom doing Algebra I w/ my son. We are working on rational expressions. I ...
A: First of all, you can write x squared as x^2. You didn't multiply the right side correctly. Since ...
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| algebra | 10/15/2009 |
Q: The last question I asked, I read it wrong. You asked if it was 625^3/4. I thought it was a ...
A: No, you can only use the radical symbol for square roots. if you call that the index number, in ...
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| fractions with variables | 10/9/2009 |
Q: im trying to help my niece with her homework, and i forgot how to do these fractions. 1/2x + 1/3x ...
A: First of all, it should be written (1/2)x + (1/3)x = (1/6)x -5 to avoid confusion, since 1/2x could ...
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| algebra 2 | 10/4/2009 |
Q: 45,000= 150r + 250s
A: First of all, never, never use a comma in an equation. What do you want to do with that? You can ...
|
| Maths lesson | 10/4/2009 |
Q: I am 14 years old and lv.4 in maths. I am in set 3. A set higher then i should be and i can't ...
A: The only I can help you is to show you how to problems if you want to send me a few. Sorry, but ...
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| Simplifying multiple polynomials | 10/1/2009 |
Q: This is quite puzzling for me as i don't know the exact way to solve this. Simplify: a^2 - a - 12 ...
A: OK, you have (a-4)(a+3)/(9-a) divided by (a+3)/(a+4) You flip over to get the expression I gave you ...
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| Algebra | 9/29/2009 |
Q: -6x - 3x = -1 0.05 + 0.09(1500 - P) = 70 2x + 2/7 - 5x - 2/7 = 5/7 x + 9 = 5(3x - 6) 5(x + 8) = -13 ...
A: You always need to multiply out and combine terms. -9x = -1 so x = 1/9 0.05 +135-0.09P = 70, -0.09P ...
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| Synthetic division of polynomials | 9/8/2009 |
Q: I was learning about synthetic division of polynomials a while ago, but one thing always puzzled me: ...
A: First of all, if x-2=0, then obviously, x=2. They never taught synthetic division when I took ...
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| Algebra Solution | 8/29/2009 |
Q: I'm having difficulty solving the following. Perhaps you can help. 0.05x + 0.02y = 44 If I let x ...
A: You did use basic arithmetic. This time you put in a lot of extra steps that were not needed. The ...
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| Algebra Solution | 8/28/2009 |
Q: I'm having difficulty solving the following. Perhaps you can help. 0.05x + 0.02y = 44 If I let x ...
A: With only one equation you cannot solve for two variables. For any value of x there's a value for y ...
|
| Projectile Motion in algebra | 8/28/2009 |
Q: I need help with a question about projectile motion found in an algebra packet. "A projectile is ...
A: The equation is H = v0t-(1/2)gt^2 where H is the height, v0 is the inital velocity and g is the ...
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| Simplify by adding or subtracting | 8/27/2009 |
Q: 3(a-6) 4(a+6) ______ _ ______ 10 6 Not sure how to do this one either. He ...
A: Simplier to write it 3(a-6)/10 - 4(a+6)/6 you can multiply each term by 30 to get 9(a-6) -20(a+6) = ...
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| Algebra | 8/23/2009 |
Q: I have a question concerning solving inequalities. "An open box is formed my cutting squares from ...
A: I presume that when you multiplied it out and combined terms you got 4x^3-54x^2+180x-125=0. Since ...
|
| algebra | 8/22/2009 |
Q: age:14 graphing: 1) y=1/3x-2 2) x=-4 3) 3x-4y=12 4) y>2/3x 5) y=2x-3 & y=-1/2x+1 6) y>3 & y<2x-2 ...
A: I presume you have a piece of graph paper. I can't graph for you but you can do it yourself. 1, 2, ...
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| Algebra 2 | 8/20/2009 |
Q: List the possible rational roots for the equation: x3 + x2 - 4x + 4 = 0 {±1, ±2, ±4} No answer ...
A: 1. no answer is correct 2. -1, -2, +/- 3^1/2 3. no answer 4. -1, -0.5, 4 5. no answer 6. no answer ...
|
| Algebra | 7/31/2009 |
Q: Homework check 1.Solve: n4 - 2n2 - 8 = 0 n = ±4 n = ±2 n = ±4 or ±2 n = ±1.41i or ±2 2. Solve: ...
A: It would have been nice, when you listed 4 choices, to label them a,b,c,d 1. n=+/- 1.41i or +/- 2 2. ...
|
| factor a polynomial | 7/26/2009 |
Q: Would you please show me the steps on how to factor: x^3-4x^2-11x-6. From another website I found ...
A: If you multiply (x+1) and (x-6) you get x^2-5x-6. If you then divide that into x^3-4x^2-11x-6 the ...
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| can u please help me? | 7/21/2009 |
Q: 1. How many solutions exist for a quadratic equation? How do we determine algebraically whether the ...
A: 1. 2, use quadratic equation 2. factor to get (x-13)(x+3) so that x = 13,-3 use quad. eq. x = [10 ...
|
| Algebra help | 7/20/2009 |
Q: Raridon, Can you please help with any of these problems? Simplify: 3 square root 2w-5=1 a) w= 7 ...
A: You don't have to write out square root, just ^1/2 Do you mean 3(2w-5)^1/2 = 1 or 3(2w)^1/2-5 = 1? ...
|
| factoring | 7/17/2009 |
Q: i need help on factoring completely one each equation a) x^4-8x^2+16 b) 16x^4-625 c) 27x^3+64 ...
A: a) (x^2-4)^2 = [(x+2)(x-2)]^2 b) (4x^2+25)(2x-5)(2x+5) c) Since 27 and 64 are both cubes, one of the ...
|
| Interest Formula | 7/17/2009 |
Q: How does p + prt = p(1 + rt)? It appears that the "p" has been divide out from p + prt, but that ...
A: That's not a proper interest formula. If the principal is P and the annual interest rate is r and ...
|
| Algebra | 7/17/2009 |
Q: Algebra is i swear my mortal enemy i can't seem to get it at all. I was hoping if you could clairfy ...
A: When you want to factor something like 3x-9xy you look for what's common in each factor. Can't you ...
|
| alg 2 cross check hw | 7/17/2009 |
Q: Find the number of equivalent radians in exact value: 270° 2p 3 2 3p 3p 2 3 2p 2. Find the ...
A: If this was a cross check why didn't you indicate which answers you thought were correct? 1. 3p/2 ...
|
| Polynomials and Factoring | 7/15/2009 |
Q: Please help me with these. I don't understand any of them. I need to show my work on how I came up ...
A: 2. Just combine like terms to get 4x^3-14x^2+8x+7 3. Just multiply it out to get 2x^4-x^3 4. ...
|
| algebra | 7/15/2009 |
Q: Working with Quadratic Equations and I am totally lost. The three techniques used to solve a ...
A: Let's factor it first to get (x-13)(x+3) so x = 13, -3 For competing the square, re-write it x^2 ...
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| math | 7/7/2009 |
Q: one question I remember was this 1 2/5(x)=z+r it was like being in from Houston and landing in ...
A: The method of solving an algebra problem depends upon the problem. There are no "cook book" methods ...
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| math | 6/30/2009 |
Q: find abc if (ab+3c)=12 and (ab-3c)=4
A: Since you have only two equations you will have multiple answers. Add the two equations together ...
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| Algebra | 6/24/2009 |
Q: I am stuck on how to find the sum of: (2y over y sqaured + 4y + 4) + (3 over y squared + 6y +8)
A: 2y/y^2 +4y +4 +3/y^2 +6y +8 simply combine terms to get 3/y^2 +12y +12. However, what you really ...
|
| fraction numbers using substitution method | 6/23/2009 |
Q: can u help me solve this, it's for my nephew's assignment for tom.i'll be glad if u can give me the ...
A: First of all, for clarity, you need to write (5/3)x+2y = 1/3 +y and I assume you mean 2x-3 +(y/3) = ...
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| Quadratic equation | 6/23/2009 |
Q: I have a question regarding an example given in a text book. It involves the method for solving ...
A: Well, first of all this one is easy enough to factor to get (x+5) and (x-2) so x = 2,-5. What ...
|
| Linear equations help! | 6/21/2009 |
Q: I am completely lost in the area of algrebra. I am 22 years old. I am hoping you can explain, if ...
A: If Qs = Qd then -5+P (you don't need the 1) = 9-P. You can add or subtract the same thing from both ...
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| algebra | 6/15/2009 |
Q: 23. Determine if the sequence is arithmetic, geometric, both, or neither: 1/12,2/13,3/13,4/14 ...
A: 23. neither 24. -7, -39 25. 56, 92 26. 40.5, 60.75 27. 31250 28. 4181 29. 11600 30. 5675 32. 81 33. ...
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| math | 6/15/2009 |
Q: 1. If a varies directly as b, and a = 75 when b = 40, find a when b = 12. 2. A public opinion poll ...
A: 1) a = 22.5 2) 11,200 3) p = 18 4) You have to realize that if one root is -1+i then another root is ...
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| i dnt understand please help | 6/13/2009 |
Q: 18. Solve: (x^2 - 1)(x^2 + 3x + 2) = 0 19. Solve: x^2(x^4 + 16) = 8x^4 20. Solve: (Hint: ...
A: 18. x = 1,-1,-1,-2 19. x = 0, 2,-2 20. x = 1/2, 5 21. if you really mean (t-2)*3-(t-2), then t = 2 ...
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| math..help | 6/13/2009 |
Q: 1. Factor the polynomial: 121x^2 - 1 2. Factor the polynomial: 16x^2 + 40xy + 25y^2 3. ...
A: Your clue on 1 and 2 is the presence of squares 1. (11x+1)(11x-1) 2. (4x+5y)^2 3. (2p+1)(4p^2-2p+1) ...
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| POLYNOMIALS | 6/12/2009 |
Q: 1. List the possible rational roots for the equation: x^3 + x^2 - 4x + 4 = 0 2. List the possible ...
A: 1. The only way I know to solve this is to write it f(x) = x^3+x^2-4x+4 and then put in values for ...
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| sin,tan,cos....please help | 6/12/2009 |
Q: 1. Choose the correct function value for: cot 81.1° 2. Choose the correct function value for: ...
A: If you had a calculator, you could have answered all of these a lot quicker than typing all of them ...
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| polynomials | 6/11/2009 |
Q: 19. Simplify: (9 - 5t)(5t - 9) 20. Simplify: (p^2 - 2q^2)(p^2 + 2q^2) 21. Simplify: (2z^2 - ...
A: You need to learn to multiply 19. -25t^2+90t-81 20. p^4 -4q^4 21. that's already simplified 22. x^4 ...
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| math | 6/11/2009 |
Q: 1. Simplify, arrange the terms in order of decreasing degree of x and find the degree of the ...
A: 1. 5x^2-7 2. 2x^2yz^2 3. 3n^2-n+6 4. 4a^2+5ab-2b^2 5. -25 6. 24a^2-ab+30b^2 7. f(x)=x+5 8. 3y+2x=0 ...
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| algebra | 6/10/2009 |
Q: 5. Determine the missing roots: Equation: x^4 - 3x^3 + 4x^2 - 6x + 4 = 0 Roots: 1, 2, i sq root 2 ...
A: 5. write sq. root 2 as 2^1/2 here's a clue. imaginary roots always come in pairs so the other root ...
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| Can You Please HELP ME!!! | 6/9/2009 |
Q: 1. One hundred dollars is invested at 7.2% interest compounded annually. Determine how much the ...
A: 1. $107.20 2. $200.42 3. $1126.82 4. $1430.77 5. $3150 6. 0 if it's 10% of the original value. ...
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| algebra 2 please help | 6/9/2009 |
Q: 1. Solve: n^4 - 2n^2 - 8 = 0 2. Solve: c^3 + c^2 - 7c - 3 = 0, given root -3 3. Solve: y^4 - ...
A: 1. 2, -2, +/-(-2)^1/2 2. other roots are 1 +/-(2)^1/2 3. 1+i, 1-i, 3,-2 4. x = +/-2, y = +/-2 5. x = ...
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| algerba | 6/1/2009 |
Q: I have no idea how to do equations they blow my mind i can keep order of operation together i have a ...
A: That's an easy problem. Let x = lb. of 0.22/lb feed and y = lb. of 0.50/lb feed x+y = 22 and ...
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| Perfect Squares | 5/29/2009 |
Q: Why are perfect squares useful in solving quadratic equations?
A: It's generally called "completing the square." Suppose you had x^2+6x+3 = 12 You could re-write it ...
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| A problem | 5/18/2009 |
Q: 30h-2h=12-7h
A: First of all, combine terms to get 28h = 12-7h You can add or subtract the same thing to both sides ...
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| Algebra II | 5/11/2009 |
Q: I don't understand how to do any of the following problems Could you please help. Directions: Find ...
A: 1) x+3 = 2x^2, 2x^2-x-3= 0 = (2x-3)(x+1) so x = 3/2,-1 y = x+3 = 9/2 or 2 2) y^2 = 49-14x+x^2 so ...
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| Elem & Intermediate Algebra 3e | 5/9/2009 |
Q: 104. Time to swing. The period T (time in seconds for one complete cycle) of a simple pendulum is ...
A: Well, the standard way to write it is T = 2(pi)(L/g)^1/2 where g is the acceleration due to gravity. ...
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| Foiling | 5/7/2009 |
Q: I was wondering if you could show me how to get to this answer in steps. 3x^2 + 7x + 2 Thats what I ...
A: Well, I never learned foiling when I took algebra 60 years ago. However, the factors have to be ...
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| Algebra | 5/6/2009 |
Q: Could you please tell me it theses are correct. Thank-you! Divide. 1.Then simplify by taking root, ...
A: For a cube root, instead of writing root3:sqrt(54) you just write (54)^1/3 For a fourth root, it's ...
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| math...please help | 5/4/2009 |
Q: 8. At the grocery mart, a 575g can of green beans cost $0.39. How much will an 810 g can of green ...
A: 8. 575/0.39 = 810/x so x = 0.55 14. 32(1.5) = 8r so r = 6 15. 12(36)^1/2 = p(16)^1/2 so p = 18 16. ...
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| Fractions in algbraic equations | 5/2/2009 |
Q: In the following questions how do we remove the fractions?We are supposed to use the addition method ...
A: Don't you know about LCM's, lowest common multiple? You pick the smallest number that you can ...
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| Algebra | 4/29/2009 |
Q: Could you please tell me and tell me if these are correct Thank-you! 1. Simplify Root:3 ...
A: 1. (-512x^3)^1/3 = -8x 2. ok 3. you can write it 10x^2(5)^1/2 4. (162)^1/2 = 9(2)^1/2 5. ...
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| Parallel and Perpendicular Lines | 4/27/2009 |
Q: How to you write an equation of a line that is parallel to a given line and passes through a point? ...
A: One standard equation for a line is y=mx+b where m is the slope and b is the y-intercept. Any ...
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| Algebra | 4/23/2009 |
Q: Could you please tell me if these are correct, I want to make sure I do well on this test. I am not ...
A: 1. All those slashes are confusing. Your answer is not correct. I would assume it's really ...
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| algebra | 4/22/2009 |
Q: I do not know how to find the zero's of this function. 1/3x^3-x^2-3x+2 please help
A: For clarity you should write it (1/3)x^3-x^2-3x+2. You can't factor it so write it f(x) = ...
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| Algebra | 4/22/2009 |
Q: I been working on these problems and having some trouble. Problem 1. 4/5+1/6=1/x ...
A: 1. 4/5 +1/6 = 1/x 24/30 +5/30 = 29/30 = 1/x so x = 30/29 2. 9/(2v) +1/v = 1 9 +2 = 2v so v = 11/2 3. ...
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| pre-algebra | 4/15/2009 |
Q: 7m-12=2.5m+2 m= ?
A: You can add or subtract the same thing from both sides of an equals sign without changing the ...
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| algebra | 4/13/2009 |
Q: 1.The perimeter of a rectangle is 22 m. The length of the rectangle is 1 m less than 3 times the ...
A: All you have to do is put into an equation what you have in words. 1. 22 = 2L+2W and L = 3W-1 so ...
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| Related to applicaton of exponential functions | 4/11/2009 |
Q: A certain species of deer is to be introduced into a forest, and wildfire experts estimate the ...
A: I am using a TI-35 Plus calculator that I've had for years. Every key has two functions. The first ...
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| algebra | 4/9/2009 |
Q: 1. Two isosceles triangles have the same base length. The legs of one of the triangles is 3 times as ...
A: 1. (8,7,7) and (8,21,21) 2. 8 hold 30, 16 hold 25 3. air speed = 350mph, wind speed = 50mph 4. base ...
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| college algebra | 4/6/2009 |
Q: Can you help me with the following. This test is due today and I only have these 4 left to finish. ...
A: #1You could have written it[(16-x^2)/(6x+12)][(x^2+5x+6)/(x^2-8x+16)] so then you have ...
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| help...i am confused! | 4/5/2009 |
Q: the table lists data regarding the average saleries of several professional atheletes in the years ...
A: 1. S(t) = 265000+109500t where t is the number of years since 1991 2. S(14) = $1,798,000 S(19) = ...
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| College algebra question | 4/4/2009 |
Q: Richard, I am taking college algebra and have a few question on an assignment. These are sample ...
A: The standard equation for an hyperbola is (x-h)^2/a^2 -(y-k)^2/b^2 = 1 where the center is at (h,k) ...
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| Algebra | 3/26/2009 |
Q: Decreasing cube. Each of the three dimensions of a cube with sides of length s centimeters is ...
A: Your problem states that the dimensions are decreased by a whole number of centimeters. So the new ...
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| Help Please | 3/21/2009 |
Q: Richard are you able to put this on a graph. I ordered a graph but I don't know how to put ...
A: f(x)=2^x and f(x)=3^x f(x) is the vertical axis on your graph and x is the horizontal axis. Just put ...
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| algebra2 | 3/16/2009 |
Q: 1. Solve:(t - 3)^2 = 8 a.) 1 sqrt2 b.) ±1, ±7 c.) 3 ± 2sqrt2 d.) 2sqrt2 2. ...
A: 1-c 2-b 3-a 4-b 5- none of those, 2 +/-(22^1/2)/2 6-a 7-d (remove the b) 8-d 9-b should be written ...
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| math help I need to see the steps | 3/11/2009 |
Q: 1. How many solutions exist for a quadratic equation? How do we determine whether the solutions are ...
A: For the quadratic equation ax^2+bx+c=0, x =[-b +/-(b^2-4ac)^1/2]/(2a) 1. If D= b^2-4ac is greater ...
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| help! alg/2 | 3/10/2009 |
Q: 31. Simplify: 1 ÷ ^3 sqrt64 32. Simplify: ^3 sqrt48 / sqrt2 33. Simplify: sqrt3 / sqrt4 + ...
A: 31. I presume by ^3sqrt64 you mean the cube root of 64. You should write it 64^1/3. Square roots ...
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| Algebra help step by step | 3/10/2009 |
Q: Richard, can you show me how to do these questions? 1. Solve by substitution or elimination ...
A: Haven't you learned how to solve two equations, two unknowns? 1. multiply 1st eq. by 3 to get ...
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| Algebra help step by step | 3/8/2009 |
Q: Richard, Please help 1. How do we write the equation of a horizontal line? What would be an ...
A: 1. y = 3 2. x = 2 3. I worked these same problems for Susan. Are you in the same class? It only ...
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| point slope + slope intercept | 3/6/2009 |
Q: Can you PLEASE explain to me how to do these equations??? I know how do them as far as setting them ...
A: y=mx+b is the standard equation for a straight line written in slope- intercept form. m is the ...
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| algebra | 3/6/2009 |
Q: Line M is the slope but what is Line N? The problem says to form the equations of both lines, what ...
A: It only takes two points to determine a straight line. One form of the equation for a straight ...
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| algebra homework help | 3/5/2009 |
Q: greatly appreciated. 1.y=2x-7 4x=2y=10 2.y=-6x y=-4x+6 3.2y=2x=8 4y-x=6 4.3x-9y=3 2x=4y=12 ...
A: 1. 4x=2y=10 is NOT a legitimate equation. Do you mean 4x-2y=10? How about 3. 2x-4y=12? Why are you ...
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| maximizing the area of a kite | 3/4/2009 |
Q: I was given a set of math problems, but this was the only one I couldn't figure out. I tried the ...
A: Since I can't see your figure, I'm assuming that the 5 and 12 pieces come together at a right angle. ...
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| I need help on solving these exponents and simplifying | 3/1/2009 |
Q: a.[6x5y3z) + 3x2/(2xy2z5) b.(2)0/3 c.(u5z8)/ (z5u-4) d. -(4a4b7)3 e.[(9a3) (10b4)]-2 f.(6x5y2z4) ...
A: You need to write exponents x^5, y^3, or z^-1. a. If you mean (6x^5y^3z +3x^2)/(2xy^2z^5) you have ...
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| help! algebra2 | 2/26/2009 |
Q: Ö = square root 17. Find the real roots of the equation: y^2 - 7 = 0 a.) y = ± 3.5 ...
A: When typing you write square roots as x^1/2. 17. b 18. 7(1/10)^1/2, not c 19. b 20. c 21. b 22. ...
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| Algebra | 2/22/2009 |
Q: Week 1 Assignment 3C 1. Simplify the algebraic expression 3x2 – 2y + 7x2 – 5y + 3 and evaluate it ...
A: 1. f = 10x^2 -7y +3 for x = 2, y = 14, f = -55 the variables are x and y, the constant is 3, the ...
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| MATH | 2/20/2009 |
Q: TOM HAS A GARDEN IN THE SHAPE OF ARECTANGLE. HE WANTED TO PLANT A TREE IN ASPECIFIC SPOT. HE WANTED ...
A: Tom can stand at one corner and have someone else stand at the opposite corner. Have a third person ...
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| algebra | 2/18/2009 |
Q: Perfect Square Trinomials 1. x(squared)- 16x+64 2.4a(squared)+4a+1 3. 9m(squared)+I'm+25 4. ...
A: Can't you take square roots? 1. x^2-16x+64 = (x-8)^2 2. 4a^2+4a+1 = (2a+1)^2 3. 9m^2+30m+25 = ...
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| Trigonometry | 2/16/2009 |
Q: Book: Algebra & Trigonometry Blitzer Page 478 Name the quadrant in which theta (Θ) lies ...
A: The sine is positive in the 1st and 2nd quadrants. The cosine is positive in the 1st and 4th ...
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| Algebra ? | 2/10/2009 |
Q: I've been out of high school (not in college yet) for 2 years now, and didn't take any math my ...
A: Well, I've been out of college for 55 years but I've used math all my life. I've answered several ...
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| Algebra | 2/3/2009 |
Q: Write a point-slope equation of the line that passes through the points (-2,7) and (8,-4). Use ...
A: slope m = (y2-y1)/(x2-x1) = (-4-7)/(8+2) = -11/10 so 7 = (-11/10)(-2)+b and b = 49/10 and your ...
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| algebra | 1/20/2009 |
Q: the sum of the digits of a two digit number is 6. the number is six times the units digit. find the ...
A: You can't just say XY = 6Y You have to spell it out and XY = 10X+Y just like 43 = 40+3. Get it? ...
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| trigonometry 1 | 1/19/2009 |
Q: oil flows in a pipeline of diameter 30cm to a depth of 12.05cm,as shown on a diagram ...
A: 1. If you draw lines from the center of the pipeline to the edges of the pipe at the top of the oil, ...
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| algebra quetion | 1/13/2009 |
Q: Hey well my teacher thinks we are in like a geometry class and so im having trouble with this one =( ...
A: You can find the equations of the diagonals which are 2y = x-1 and y = -2x+2 and then find that ...
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| Math- Basic to intermediate algrebra | 1/9/2009 |
Q: The diameter of a u.s. penny is 0.75 inch. Find the circumference and the area(of one side) of a ...
A: The ^ means a power, D^2 means D squared, or D*D. If you were writing it out, you'd just put a ...
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| algebra2 | 1/4/2009 |
Q: 1. 12Ö 40 a.) 24Ö 10 b.) 2Ö 10 c.) 24Ö 40 d.) 2Ö 40 2. Simplify: Ö 225 / Ö ...
A: It took me a little while to figure out that your symbol O with two dots over it meant a square ...
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| simplifying rational expressions with subtraction | 12/19/2008 |
Q: x+4/3x+2 - x+4/3x+2= x+4-x+4/3x+2= 8/3x+2= 4/3x= 1 1/3x Is this correct or did I go to far in ...
A: Even if you would say x-4/3x-2, which is not the same as your original statement, you could cancel ...
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| simplifying rational expressions with subtraction | 12/18/2008 |
Q: x+4/3x+2 - x+4/3x+2= x+4-x+4/3x+2= 8/3x+2= 4/3x= 1 1/3x Is this correct or did I go to far in ...
A: Well, it's obvious that the first term is (x+4)/(3x+2). However, the second term is not clear. Do ...
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| algebra 2- rational exponents | 12/11/2008 |
Q: i need help on my math... and could you tell me how to solve them to? 1. (2)^1/3 simplify the ...
A: 1. (2)^1/3 means the cube root of 2, (2)^1/2 means the square root of 2. (2)^1/3 = 1/2^3 = 1/8 2. ...
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| algebra | 12/10/2008 |
Q: 1. Suppose you are an event coordinator for a large performance theater. One of the hottest new ...
A: You have the equation wrong at the top but correct in part h. a. opens down. plotted it b. they ...
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| Algebra | 12/8/2008 |
Q: I really appreciate the assistance and feedback that you have been providing. It has been very ...
A: Graphing can be helpful to show you at least approximately where the function crosses the x-axis. ...
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| Finding the Slope | 12/7/2008 |
Q: I was wondering how you could write the equation of a line that passes through a given point and is ...
A: If you have a given line such as y = mx+b, the slope of the line perpendicular to that line is -1/m. ...
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| word problems 8 i dnt get | 12/2/2008 |
Q: what is the speed of a car that travels 150km in 3 hrs? & what distance will a car traveling ...
A: 1. 150/3 = 50km/h 2. every hour it will travel 65km 3. the car is traveling 33.3m/s and the sprinter ...
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| Intermediate Algebra | 12/1/2008 |
Q: I was ask to write a system of equations for the following questions and I responded with the ...
A: You got the right answer but you went through a lot more steps than I would have. First of all, I ...
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| slope equations(standard form to slope-intercept form to point-slope form) | 11/24/2008 |
Q: i have a question where it asks me to change a standard equation of a line to a slope-intercept of a ...
A: the slope-intercept form is y=mx+b so you have y = (1/3)x -5/6 For the point-slope form you have ...
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| Algebra II | 11/19/2008 |
Q: Im 16 (jr). i am really bad at factoring, to the point were i just spent over 15 minutes trying to ...
A: For (6d-9) the only factoring is 3(2d-3) For (6-13d+6d^2) you know that the factors are (w-xd) and ...
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| counting problem | 11/16/2008 |
Q: I am 14. This was a problem given to me at class and I am a little confused. P ...
A: You can't look at it that way because of only going diagonally. Number them as follows: L1 L2 U1 U2 ...
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| College Algebra (Factoring) | 11/11/2008 |
Q: My friend Lauren and I are creating an educational powerpoint presentation on the seven types of ...
A: Out in the real world factoring doesn't come up very often. You pick the type of factoring ...
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| Cramer's rule | 10/21/2008 |
Q: Solve using Cramer's rule 2a + 3b = 6 2a + b = -2 and a + b + 5c =2 3a + b + 2c = 3 4a + 2b - c = ...
A: Cramer's rule means using determinants The denominator determinant is |2 3| |2 1| which has a value ...
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| Algebra | 10/19/2008 |
Q: Can anyone help me solve these and show me the step it took to get the answer so I can figure out ...
A: 1. 2(x-4)+2 < 4-x 2x-8 +2 < 4-x 3x < 10 x < 10/3 2. (y-1/3) -1 > y/2 y -4/3 > y/2 y/2 > 4/3 y > 8/3 ...
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| Linear Equations & Applications | 10/15/2008 |
Q: Linear Equations & Applications ? Can anyone hlp me with these problems and show me how to work them ...
A: You need to include parentheses to make your problems clearer. I'm assuming this is the way you ...
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| systems of equations in three variables | 10/14/2008 |
Q: i do dont understand how to do this. here is the problem. if any one can help me i thank you. ...
A: 1. you know that z=-5 so put that into the first two equations -6x+2y-60 = -90 -4x+y-20 = -40 So now ...
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| need help | 10/11/2008 |
Q: a passenger train and a freight train start at the same time form stationsthat are 405 miles apart ...
A: P = 2F and (P+F)3 = 405 so F = 45mph and P = 90mph If the distance each way is D and his rate going ...
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| algrebra!!! | 10/9/2008 |
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 |
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 |
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 |
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 |
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 |
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 |
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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| out of this world desperation !! | 9/18/2008 |
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 |
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 |
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 |
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 |
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 |
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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| quadratic equation | 8/26/2008 |
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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| Applied Algebra | 8/3/2008 |
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 |
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 |
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 |
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 | 6/25/2008 |
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 |
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 |
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 |
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 |
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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| Slope-intercept | 6/17/2008 |
Q: Write the equation using slope-intercept? Passing through (4,2) and (3,4) and state the standard ...
A: The slope-intercept equation is y=mx+b where m is the slope and b is the y-intercept. So put in ...
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| Justifications for two proofs | 6/16/2008 |
Q: I have two proofs that I am unsure how to do. I need the justifications for each step. What I have ...
A: I'm not used to doing proofs for algebra. Given 3x -1 = 0 You can add the same thing to both sides ...
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| algebra | 6/13/2008 |
Q: 2X/3-5=7 I think i am doing it wrong... I try to sove the 2x first by not using the 3 2x+5=7 ...
A: 2x/3 -5 = 7 you can add or subtract the same thing from both sides of an equals sign without ...
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| Using Linear Combinations to Solve a Linear System | 6/13/2008 |
Q: Help i don't know how to solve this question. Solve the linear system by using linear combinations. ...
A: I don't know what you mean by linear combinations but here's how I would solve it. Divide the 2nd ...
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| Algebra I - Multiplying Fractions | 6/11/2008 |
Q: In multiplying fractions, the solution shows that they inverted the integers within parenthesis in ...
A: They didn't invert the integers which means turning things upside down. They reversed the terms, ...
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| slopes | 6/2/2008 |
Q: define and give four examples of the four basic types of slopes:positive, negative, zero, and ...
A: Do you have any graph paper? It only takes two points to draw a straight line. Just put in a ...
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| question | 6/2/2008 |
Q: i have a question... how do i simplify this? 1/x+y - 1/x-y + 2x/x^2-y^2 how do i add/subtract ...
A: 1. For clarity you should write it 1/(x+y) -1/(x-y) +2x(x^2-y^2). Multiply each term by (x^2-y^2) ...
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| Algebra | 5/28/2008 |
Q: I am trying to help my son solve this: -12x + 10 = 3x + 15
A: You can add or subtract the same thing from both sides of an equals sign without changing the ...
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| logarithms | 5/25/2008 |
Q: @@@@@IMAGE:4232:Algebra-2061/2008/05/jpg.jpg##### ANSWER: What's your question? Sorry, I didn't ...
A: That didn't enlarge it on my screen. I had to use a magnifying glass to answer 18-C and 20-C. For ...
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| negative numbers again | 5/18/2008 |
Q: Richard: One more thing... how can you subtract a negative number anyway? If you have +7 apples, ...
A: +7 apples -4 apples simply means you're taking 4 apples away from seven, leaving 3 apples. There's ...
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| college algebra application problems | 4/27/2008 |
Q: i am 28yrs. i actually have 4 problems i wanted to see if i could get help setting up and get ...
A: 1. This problem is not stated correctly since 1-p would be negative for p greater than 1. You need ...
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| systems of equations/algebra | 4/26/2008 |
Q: You helped me about two months ago with this type of problem. I have gone round and around with this ...
A: Decide on which variable you want to eliminate first. It looks like z is the easiest. Multiply the ...
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| Graphing functions | 4/9/2008 |
Q: I have two problems, the first one is f(b)=|3-4b| I'm pretty sure it is needing to be in Y=mx+b ...
A: No, you can't put it into a y=mx+b format since that's a straight line and this is not. f(b) is ...
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| College Algebra & Trigonometry | 4/8/2008 |
Q: Use Descarte's Rule 0f Signs to determine the possible number of positive and negative real zeros ...
A: 1) there are no real zeros 2) 95-96 13.3%, 96-97 7.8%, average 10.6% 3) 20,184 ft^2 4) 184.6 5) ...
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| Substitution / elimination methods | 4/1/2008 |
Q: I need to see the problems worked out in these two methods. I have got to make sure I have it right. ...
A: 2x+3y=5 and 9y=15-6x using substitution with 2x=5-3y, 9y=15-3(5-3y) so y=0 and x = 5/2 2x-3y = -1 ...
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| pre-algebra (7th grade) | 3/27/2008 |
Q: How do you solve 7 - 5u = -43?
A: you can add or subtract the same thing from both sides of an equals sign without changing the ...
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| College Algebra & Trigonometry | 3/27/2008 |
Q: I need assistance with the following: Find the zeros for the polynomial function and give the ...
A: For the first one, the correct answer is the first one after Possible answers. 2. You could have ...
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| Questions I am stuck on | 3/22/2008 |
Q: I have 60 question internet assignment that requires you to give the exact answer. I keep on getting ...
A: 1. 1/(x+3) -1/x = (x-x-3)/[x(x+3)] = -3/{x(x+3)] 2. [(x+3)(x-1)]/[(x+2)(x-2)][(x+1)(x+2)]/(x+3) = ...
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| College Math | 3/22/2008 |
Q: 7.) A motorboat travels 162km in 3 hours going upstream and 882km in 9 hours going downstream. What ...
A: Your answers for #7 are distances when you want velocities. Call the boat speed b and the current ...
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| Steps to solving | 3/16/2008 |
Q: I have the follwing equation (2x+3)^3 - 64. The book gives the answer (2x-1)(4x^2 + 20x +37). I ...
A: That's an expression, not an equation, since you don't have an equals sign. ...
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| Parabolas - Finding Vetex & Opening Direction | 3/14/2008 |
Q: I'm Emily and I'm currently 16 years old. I have these 4 problems and I have absolutely no clue how ...
A: the y=ax+b form applies to a straight line, which these are not. the standard equation for a ...
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| algebra II (number problems) | 3/11/2008 |
Q: im a home school parent and i was directed to this site by another parent and i have a daughter she ...
A: 1. 19,8 2. 38,39,40 3. 9,10,11 4. 700,500 5. 2 3/4, 8 1/4 6. 43,47 7. 150,30 8. 12,12,8 9. 15,30 10. ...
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| Merging Exponents and Roots | 3/6/2008 |
Q: Good Morning, I was hoping you would be able to help me with two problems and check my work on the ...
A: You used exponents. A square root is simply ^1/2. ((-64)/(27)^(-1/3) = ((27)/(-64))^1/3 = 3/-4 = ...
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| College Algebra | 3/1/2008 |
Q: I have two . (1)How do you multiply exponents when the base is the same but one exponent is positive ...
A: (1) you add the exponents so 7^2 times 7^-5 = 7^-3 or 1/7^3 which is 1/343 You can write square ...
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| math project question | 2/29/2008 |
Q: I know that project question might be weird, but i would REALLY like to pass this marking period. ...
A: If the original length is L, the blue length BL = L -(L/6)t RL = L -(L/3)t and PL = L-(L/12)t so ...
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| Never made a graph before! | 2/28/2008 |
Q: Okay, so here is theWhen an object suck as a bullet or a ball is shot or thrown upward with an ...
A: First of all you have to find out how long the rocket will continue upward. For that you need V = ...
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| Equation Involving Radicals | 2/28/2008 |
Q: I am really struggling with these few. Is there anyway you would be able to check my work and help ...
A: For 2(x-8)^1/2 +(x-5)^1/2 = 2(y^1/2), when x=9, y=4 1) you need to realize that, when x=8, ...
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| Equation Involving Radicals | 2/27/2008 |
Q: I am really struggling with these few. Is there anyway you would be able to check my work and help ...
A: You can also indicate square root by ^1/2 1. x^1/2 +(x+8)^1/2 = 2, no solution 2. 2(x-8)^1/2 ...
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| rounding square roots without a calculator | 2/25/2008 |
Q: Find the distance between the points. (√7, -√3) & (-√10, √5) The ...
A: It's difficult to estimate square roots since they're non-linear. For 70^1/2, for example, you know ...
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| algebra | 2/25/2008 |
Q: A bag of M&M candy has 5 brown, 6 yellow, 4 blue, 3 green, and 2 orange colors. What is the ...
A: You start with 20 M&M's and there are 6 yellow ones so the chances of pulling out 1 yellow one is ...
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| math | 2/23/2008 |
Q: please help me, my teacher gave me an homework about verbal problems this last February 18 2008 and ...
A: Here's a few problems. 1) If Mary can paint a room in 5 days and John can paint the same room in 3 ...
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| Rational Expressions | 2/11/2008 |
Q: I am working on Rational Expressions and I just don't get it. The factoring thing has me totaly ...
A: Factor each part x^2-4 = (x+2)(x-2) x^2-x-6 = (x-3)(x+2) x^2x-2 do you mean x^2-2x which would ...
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| Algebra | 2/7/2008 |
Q: Multiply and express the product in the simplest form: 1. (x-3/2)^3 x(1/x-3)^2 2. x^2-9/x+2 x ...
A: I presume you're using x for multiplication. Not a good idea 1. [(x-3)/2]^2[1/(x-3)^2] = 1/4 2. ...
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| Algebraic Questions | 2/6/2008 |
Q: In some of the problems I am to reduce, find the illegal values with algebraic fractions,and I am ...
A: 10. [m^2n^3/p^3]/[mp/n^2] = [m^2n^3/p^3][n^2/mp] = mn^5/p^4 11. ...
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| Some math problems I am not sure about | 2/5/2008 |
Q: A survey asked a random sample of U.S. adults if they favored abolishing the penny. The circle graph ...
A: 1. Let Y = % yes and N = % no so Y+N = 78 and N = Y+37 giving Y = 20.5% and N = 57.5% 2. 5X = 6 ...
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| Algebra 1 | 1/31/2008 |
Q: my question is about Division Properties of Exponents. They're 3 problems and they are all word ...
A: It looks like all of them are graphs. I can't sketch them for you. You can plot a few points and ...
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| quadric formula and such | 1/30/2008 |
Q: can you please explain to me how to solve word problems using both the quadric formula and the ...
A: The Pythagorean theorem states that for a right triangle, x^2 +y^2 = h^2 where x and y are the two ...
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| very basic algebra | 1/28/2008 |
Q: I am a Math major and I tutor in Math while I am in school. I am currently tutoring someone who is ...
A: C(ost) = 8 +4H where H is the no. of hours You should have been able to explain that it's a linear ...
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| help! | 1/17/2008 |
Q: I was asked to graph 3x-2y=o using y=mx+b, and i am completely confused. and i have no idea how to ...
A: Well, you can re-write it as y = (3/2)x and in this case b is 0 since the line goes through the ...
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| algebra | 1/13/2008 |
Q: how do i solve 3x-2 is greater or less than 35? also can u explain the concept of point-slope i ...
A: That's two problems, 3x-2 > 35 and 3x-2 < 35 Just take 3x-2 = 35 so 3x = 37 and x = 37/3 Therefore, ...
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| chemistry | 1/1/2008 |
Q: I'm having some trouble with these chem. problems. 1. How many grams of I2 are produced when 32 g ...
A: 1. Br2 + 2KI -> I2 +2KBr mol. wt of Br2 = 141.82, mol. wt. of I2 = 253.8 so 253.8/141.82 = x/32 and ...
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| Algebra | 12/11/2007 |
Q: 3y-18=2(y-5) 3x+2=10x - 4 What is the value of x... and y. ANSWER: 3y-18 = 2y-10, combine terms ...
A: 3y-18 = 2y-10 surely you have learned that you can subtract or add the same thing to both sides of ...
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| algebra | 12/5/2007 |
Q: i have a 100 pt assesment tommorrow and i have a review sheet that is kicking me. i don't get any of ...
A: slope = (y2-y1)/(x2-x1) = (2+4)/(1-9) = -3/4 for slope-intercept, you have y = mx+b so 2 = ...
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| algebra 2 =/ | 11/25/2007 |
Q: Hey i have a few questions that i do NOT understand can U please help me?? 1. Laura has a total of ...
A: 1. Q+D+N = 16 and N + Q+D and 0.25Q+0.10D+0.05N = 1.80 Substitute for N in each equation and you ...
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| Algebra 2 | 11/7/2007 |
Q: I have a question, of course. How do you solve: x-2y-w=0 2x-y+z=1 -x+z+w=0 3y-z+w=2 using ...
A: I'm going to list them in order, w,x,y,z the denominator, D = |-1 1 -2 0| |0 2 -1 1| |1 -1 0 1| ...
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| linear equations | 10/23/2007 |
Q: i dont understand how to solve this equation please help?? 2w-x+5y+z=-3 3w+2x+2y-6z=-32 ...
A: One way to solve them is by using determinants. First you create a determinant, D, of the ...
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| unique solutions | 10/19/2007 |
Q: Find k if the following system of equations has a unique solution. 2x + (k-1)y=6 3x+(2k+1)y=9 I ...
A: no, all you did was multiply out the equations. If you eliminate x from the equations you also ...
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| word problem for school | 10/18/2007 |
Q: I have a homework problem that is frustrating me. One plane is 730 miles east of the city traveling ...
A: You set [(730-225t)^2 + (500-154t)^2]^1/2 = 1 and solve for t. Since they will both arrive at the ...
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| algebra | 10/9/2007 |
Q: i have a few questions i need explanning with i trulley don't understand. I'm 11 years old. thank ...
A: 1) 28y-y=5y-2 first of all, combine terms to get 27y =5y-2 you can add or subtract the same thing ...
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| need help answ.ering these science questions | 9/9/2007 |
Q: 1. how much current flows in a 12 - watt radio connected to a 120 - volt circuit? 2. if you have ...
A: 1. P = IV so 12 = I(120) and I = 0.1 amp 2. a) series, full current through each bulb b) parallel 3. ...
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| APR | 9/7/2007 |
Q: Raridon, My question is if I put 5,000 dollars into a bank cd investment for nine months and the ...
A: I never expect to be paid. I'm retired and do this because I've done algebra for 60 years and it's ...
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| APR | 9/6/2007 |
Q: Raridon, My question is if I put 5,000 dollars into a bank cd investment for nine months and the ...
A: I don't know what you mean by "locked". If the percent is 5.25 for a year, then for 9 months you'd ...
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| alg II/trig | 8/29/2007 |
Q: a2x3 + (5a2b + ab)x2 + (ab3 + 5ab2)x + b4 divided by ax + b (note: all numbers (2s,3s, & 4s) ...
A: Do you understand how to divide 25 into 12625? You look at ax+b and the first term is a^2x^3 so ...
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| Algebra | 8/21/2007 |
Q: A) Find the equation of the straight line that passes through the point (2,4) and is parallel to the ...
A: A) re-write the equation y = (-2/3)x +8/3 so the slope of the line is -2/3. for the new line, 4 = ...
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| help | 8/15/2007 |
Q: how can i simplefy this equation 3/2 - ã5
A: That's not an equation since there's no equals sign. I assume that strange symbol means "square ...
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| Questions for Algebra..im lost help | 8/10/2007 |
Q: state the domain range of -3f(x) state the domain range of y=1/(x+3) find the inverse of each ...
A: I don't do domains and inverses. y = x^2-6x-7, 64, x = 7, -1 y = 3x^2-2x+1, -12, x = 1/3 +i(2^1/2), ...
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| mathematics(algebra 2) | 7/29/2007 |
Q: what is the advantage and disadvantage of the method elimination,substitution,graphing,comparison
A: I assume you're talking about solving two equations with two unknowns. All three methods will give ...
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| Algebra | 7/21/2007 |
Q: I really am stuck with these few questions. 1.The demand and supply equations for a certain item are ...
A: 1. Just set them equal, -5p+40 = -p^2+30p-8 and solve for p. So you have p^2-35p+48 = 0 and p = 1.42 ...
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| Algebra Question | 7/9/2007 |
Q: I need to find a general form equation for the line through the pair of points. (-2,4) and (5,1) ...
A: Sure, it's easy. The general equation for a line is y=mx+b where m is the slope and b is the ...
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| MATH | 7/6/2007 |
Q: HOW TO SOLVE THE SQUAREROOT OF A NUMBER BY LONG HAND COMPUTATION EXAMPLE:27
A: It's sort of like long division. So you write the number 27.000000 and you work with pairs of ...
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| Equation of a line | 6/27/2007 |
Q: Why are equations of horizontal lines of the form y=k, where k is a constant? and why are equations ...
A: Take a piece of graph paper, put x and y coordinates on it and draw the lines y=3 and x=2 completely ...
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| Equation of a line | 6/27/2007 |
Q: Why are equations of horizontal lines of the form y=k, where k is a constant? and why are equations ...
A: It should be obvious that horizontal lines do not contain x since x can be any value. For example, ...
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| x/y intercept | 6/26/2007 |
Q: If a line has an x-intercept, how many does it have? Explain and does every line have a y-intercept? ...
A: The standard equation for a line is y=mx+b where m is the slope and b is the y-intercept. To find ...
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| math query | 5/17/2007 |
Q: Find the values of m,n E R for which the system of equations x+2y=1; 2x+my=n (a)possesses a unique ...
A: Let's look at (b) first. Yes, the lines will be parallel. Therefore, m would equal 4 and n would ...
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| needing help with different problems | 5/13/2007 |
Q: 1.) Solve x/7-1/2=x-11/2 2.) Which of the following is not a polynomial? a.) 4x^3+5x-1 b.) ...
A: 1) multiply each term by 14 to get 2x-7 = 14x-77 so x= 35/6 2) d 3) 4/(x+3) 4) 6(3^1/2) 5) If it's a ...
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| different problems | 5/11/2007 |
Q: here are a few questions I need help with? Thanks so much!!! 1.) solve -9(x-3)^2=-7 2.) Solve ...
A: 1) (x-3)^2 = 7/9 x-3 = +/- (7/9)^1/2 so x = 3 +/- (7^1/2)/3 2) x^2 = 14/9, x = +/- (14^1/2)/3 3) ...
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| word problems | 5/9/2007 |
Q: 1.) The length if a rectangle is 1 cm longer than its width. If the diagonal of the rectangle is 4 ...
A: 1) L = W+1 and L^2 +W^2 = 4^2 so W = 2.284 and L = 3.284 2) the correct equation is h = 112t -16t^2 ...
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| Problem of the Week | 5/7/2007 |
Q: Kelvin plays basketball and is known for his dunks. He also loves math and decided to study the ...
A: In this case you need to use the more general expression, h = h0 +vt -16t^2 where h0 = 99 inches = ...
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| Here's my square root number | 5/4/2007 |
Q: All right, here is the number you'll teach me with: 5 Thank you so much
A: write as 5.000000 in order to get the square root to 3 decimals. You get one decimal in the answer ...
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| ABCD x4=DCBA | 5/1/2007 |
Q: I have found that the answer to ABCD x4=DCBA is 2178=8712, but can you explain it so a 14 year old ...
A: I'm not sure I can explain it so that you can understand it. The number ABCD can be written 1000A ...
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| word problems | 4/30/2007 |
Q: profitable fruitcakes sharons revenue R(in dollars) on the sale of x fruitcakes is determinrd by the ...
A: Just put down what you indicated, P = R-C = 50x-x^2-2x-40 or P = 48x -x^2 -40 by setting P = 0 and ...
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| quadratic equations | 4/29/2007 |
Q: There are a few problems I need help with, hope fully you can help me, I am 24 yrs old. I ...
A: 1. x^2 = 13/25 so x = +/- (13^1/2)/5 2. (x-5)^2 = 3/2 so x-5 = +/-(3/2)^1/2 or x= 5 +/-(3/2)^1/2 3. ...
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| radical equations | 4/26/2007 |
Q: I was wanting to see if you could help me with these problems. Thank you. 1.) Simplify ...
A: 1. Yes, that's correct. 500^1/2 = 10(5^1/2) 2. I assume you mean (75a^2)^1/2/5^1/2 = 15^1/2(a) 3. I ...
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| radicla equations | 4/24/2007 |
Q: There are a few problems i am needing help with, I hope that you can help me and I appreciate your ...
A: 4. where did the x^2 come from? 5. 3 +3(3^1/2) -15 = 3(3^1/2) -12 6. I suspect you meant (x+4)^1/2 = ...
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| radicla equations | 4/24/2007 |
Q: There are a few problems i am needing help with, I hope that you can help me and I appreciate your ...
A: First of all, you indicate a square root sign as ^1/2, such as 4^1/2 = 2. 1. I assume this is a ...
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| word problem | 4/23/2007 |
Q: I have another pesky word problrm I can't figure out. We are doing linear programming so I know I ...
A: It looks like you have conflicting data. If P = acres of potatoes and W = acres of wheat, then P+W ...
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| algebra | 4/23/2007 |
Q: intergers? I am tring to help my daughter in math. I am 40. -15-(-13)= 13x-13= -17x(-14)= ...
A: two minuses make a plus so -15-(-13)= -15+13 = -2 13x-13 = 13(x-1) -17x(-14) = 238x +5 -4 +7 -9 -7 = ...
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| radical equations | 4/21/2007 |
Q: Yikes, this stuff makes my brain hurt. could you please help with these type of equations? sqrt ...
A: You need to write it (x+120)^1/2 -(x+3)^1/2 = 9 so (x+120)^1/2 = 9 +(x+3)^1/2 square both sides to ...
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| Distributed Practice | 4/20/2007 |
Q: 2x-y=12 y=-1/2x-6 this problem would be perpendicular but I dont get how its perpendicular.... ...
A: the standard equation for a straight line is y=mx+b where m is the slope and b is the y-intercept. ...
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| algebra | 4/17/2007 |
Q: 1. plot the graph of the equation 2x-3y=6 and 2x+y=-10 and interpret the results. 2. plot the ...
A: 1. Those are both stright lines and it only takes two points to draw a line. Just put in a value ...
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| can someone help me please, rational expressions and equations | 4/13/2007 |
Q: Solve: 1.) x/3-1/4=3x-8/12 2.) Simplify x+2/x/x-2/3x 3.)solve x/7-1/2=x-11/2 4.) add, express in ...
A: 1) multiply each term by 12 to get 4x-3 = 36x-8 so 32x = 5 and x = 5/32 2) [(x+2)/x][3x/(x-2)] = ...
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| algebra word problem | 4/4/2007 |
Q: We have just started doing logarithms. Here is the first problem I can't figure out. Vehicle theft ...
A: You don't have to use logs if your calculator will do exponentials. 1.1 million is correct You ...
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| triganomitry ????? | 3/26/2007 |
Q: A surveyor sets up his theodolite some distance due south of a building and finds that the angle of ...
A: Obviously, x = h/tan42 means divide h by tan42 and 1 divided by 0.9004 = 1.1106 so you have x = ...
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| triganomitry ????? | 3/26/2007 |
Q: A surveyor sets up his theodolite some distance due south of a building and finds that the angle of ...
A: Draw a right triangle. The base is 98, the right side is x and the hypotenuse is y. So x^2 +98^2 = ...
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| simultanious equastions | 3/25/2007 |
Q: An order for 2500 facing bricks and 300 insulation blocks cost £840.Another order was made for 1500 ...
A: First of all, leave of the pound sign in the equations. From the equations you gave, both x and y ...
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| quadratic equastion ????? | 3/24/2007 |
Q: Can you help with this one please "A brick wall is seven times longer than its height.The builder ...
A: Simple. You have two equations, two unknowns. Substitute L=7H into the second equation to get ...
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| probablility | 3/23/2007 |
Q: Find the probablility that the name of a month of the year, chosen at random, begins with a ...
A: Do you know about dice that they gamble with at Las Vegas? They gamble with pairs and one is called ...
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| Geometry | 3/15/2007 |
Q: Could you please help me on a few word problems? It would be greatly appreciated. I am trying to ...
A: 1. Let x = amt of cotton and y = amt. of nylon and amt. of polyester. Then (4x+3y+2y)/(x+2y) = 3.25 ...
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| Algebra | 3/7/2007 |
Q: I am sorry...the first two I am going to assume should be stated as = 0 (Like so) (ab)^2 + 36 = 0 ...
A: You can't complete the square on the 1st one without an ab term. You could have (ab)^2 +12ab +36 = ...
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| simplfying | 2/27/2007 |
Q: "Can you help me simplfy, with out calculator.Please (i) (a^2)^3 x square root a ...
A: (i) a^6(a^1/2)/a^5 = a(a^1/2) = a^3/2 (ii) x^5(x^1/2) = x^11/2 (iii) 3^-1/5/[3^1/4(3)] = ...
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| Area of a lot and Radius | 2/27/2007 |
Q: I have two questions for you in which I cannot answer on my homework for the life of me. All help ...
A: A. have you learned that the total number of degrees in a circle is 360? total no. of radians = ...
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| Algebra | 2/16/2007 |
Q: I need to help my kids with a Algebra question and can't. Could you please explain how to answer the ...
A: You can add or subtract the same thing from both sides of an equals sign without changing the ...
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| algebra word problem | 2/14/2007 |
Q: A large pipe is placed next to a wall and a 1 foot high block is placed 5 feet from the wall to keep ...
A: That's a neat problem. Assume the origin is at the base of the wall and the center of the circle is ...
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| algebra | 2/13/2007 |
Q: Can you please show me how you are working the problem? 1.4(2n-1)=(6n+4)+1 2.x/2-1=x/5+2 ...
A: Three lessons you should have learned by now. 1- multiply out terms and then collect like terms 2- ...
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| Algebra help | 2/4/2007 |
Q: My name is Jessica and I am 36. I am trying to figure out how to do a linear equasion, but can't ...
A: An example of a linear equation is y = 2x +3 which is the equation for a straight line. In this ...
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| algerbra...linear systems | 1/30/2007 |
Q: they are like... -3x+6y=24 also -7x+2y=-5 also -6x+3y=-6 -2x-y=1 ...
A: All of those are straight lines, which take only two points to plot. For example, for -3x+6y=24, ...
|
| PHYSICS | 1/18/2007 |
Q: STONE OF MASS 0.62 FIRED UPWARDS, ANGLE TO GROUND, SPEED 5.5M/S. KE AT MAXIMUM HEIGHT, 2.3J. HOW DO ...
A: Since KE = (1/2)mv^2, v at max. height = 2.72m/s. Since the vertical velocity at max. height = 0, ...
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| solving for x | 1/17/2007 |
Q: I appreciate it! I also have a couple more questions... 1) 3(x+4)-5(x+3)=4(x-7)+4 2) 2x-1 - ...
A: 1) As before, multiply out and then combine terms 3x+12 -5x-15 = 4x-28 +4 -6x = -21 so x = 21/6 = ...
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| solving for x | 1/16/2007 |
Q: I am helping my sister with her math. Can you show me how to solve these problems. PLEASE HELP!! 1) ...
A: First, combine terms 1) -1.4x = -2.31 so x = 1.65 2) 3-2x-4+5x+3 = 6-x+x 3x = 4 so x = 4/3 or 1.3333 ...
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| confused!!!! | 1/13/2007 |
Q: I dont understand graphing linear equations or slope- intercept form.
A: The standard equation for a straight line is y=mx+b where m is the slope and b is the y-intercept. ...
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| math | 1/1/2007 |
Q: explain how you got these answers especially the second onex to the second - 2x-24 ? i have problems ...
A: Well, you can look at it and see that the factors have to b (x+a) and (x+b) where ab = -24. So a ...
|
| trig question | 12/27/2006 |
Q: A ship captain at sea uses a sextant to sight an angle of elevation of 37° to the top of a ...
A: Here's how I would work it. Let x = distance from the base of the lighthouse at the second sighting ...
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| Bill and Allison ¦D | 12/27/2006 |
Q: Ok, so here's how it is. This kid, Bill, is two times as old as Allison was four years ago. In six ...
A: Solving it is no problem. Just re-write the second one as (A+6)/2 +4 = B = 2(A-4) and solve for A. ...
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| algebra | 12/15/2006 |
Q: solve by factoring 3xsquared+x+2=0 I think the answer is 4,-6
A: First of all, you can check to see if 4 and -6 are correct. If x=4 you have 3(16)+4+2 = 54 If x=-6, ...
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| Math Help By 5 PM Today | 12/13/2006 |
Q: I have a few questions 1.) Solve for x by completing the square: x squared + 6x = 2 2.) One leg of ...
A: 1) x^2 +6x +9 = 11 (x+3)^2 = 11, x = -3 +/- (11)^1/2 2) (x-2)^2 +5^2 = x^2 so x = 29/4 and the ...
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| Pythagorean Therom | 12/7/2006 |
Q: I am an 8th grade student and I'm having trouble with the Pythagorean Therom. I want to know what is ...
A: The Pythagorean Theorem applies to right triangles, ones that have a 90 degree angle and two smaller ...
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| Algebra | 12/4/2006 |
Q: Completing The Square 1.2x^2 -3x + 1 =0 How many x- intercerpts the parabola has and whether its ...
A: 1. 2x^2 -3x +9/8 = 1/8 [(2^1/2)x -(3/4)(2^1/2)]^2 = 1/8 x = (3/4) +/-(1/4) x = 1, 1/2 You could have ...
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| Algebra | 12/1/2006 |
Q: 1. Complete the square x^2 - 6x = 16 2. Use quadratic formula to solve. Leave irrational roots in ...
A: 1. x^2-6x+9 = 16+9 (x-3)^2 = 25 x-3 = +/-5 so x = 2,8 2. x = [4 +/-(16+60)^1/2]/6 = [4 ...
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| Algebra help | 11/27/2006 |
Q: Hey I'm Tori, thanks for the help, ohh I'm in the 10th grade. #1 Tank A contains 32 gal. of ...
A: #1 let x= gal. of 25% alcohol and y= gal of 40% alcohol. x+y = 40 and 0.25x+0.40y = 0.30(40) so x = ...
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| algebra | 11/27/2006 |
Q: -------------------------------------------Multiply a^4b^2*ab^3 Which of the ordered pairs are ...
A: a^5b^5 x-y=4, is it too much trouble to try the ...
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| Graphing | 11/15/2006 |
Q: Given a line containing the points (1,3), (2,4), and (3,5) determine the slope-intercepts form of ...
A: All three of these points are on the same straight line and it only takes two points to find the ...
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| algebra | 11/14/2006 |
Q: Hey man Im having a really hard time with this system: x^2 + 12xy + 6y^2 = 130 y^2 - x^2 - 5/6xy = ...
A: I don't see any easy way to solve these. You could try graphing them. The first equation is an ...
|
| ellipse | 11/14/2006 |
Q: I was working on ellipses, and they were doing two distances, and a a constant multiplied by two. ...
A: the standard equation for an ellipse is (x-h)^2/a^2 +(y-k)^2/b^2 = 1 or (y-k)^2/a^2 +(x-h)^2/b^2 = ...
|
| Physics | 11/12/2006 |
Q: Find the distance function s(t) if the acceleration function is given by the following formula, and ...
A: whenever you integrate without limits you have to add a constant and that's why you have an initial ...
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| algebra 2 | 11/12/2006 |
Q: I am having a hard time understanding how to graph systems such as x=7-2y y=3x and determining ...
A: x = 7-2y or y = 3x are both equations for straight lines. It only takes two points to plot a ...
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| algebra | 11/5/2006 |
Q: ------------------------------------------- -----Question-----write the equation of the line with ...
A: the standard equation for a line is y=mx+b where m is the slope and b is the y-intercept. so you ...
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| algebra | 11/3/2006 |
Q: what is the point slope graphing method and can you give an example?
A: The standard equation for a line is y=mx+b where m is the slope and b is the y-intercept, such as y ...
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| college algebra | 11/2/2006 |
Q: I have looked everywhere for an example(s) involving investments with system of linear equations and ...
A: #1) let x = amt. invested at 5% and y = amt. at 10% then x+y = 200000 and 0.05x +0.10y = 17000, ...
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| algebra | 11/2/2006 |
Q: 1.Find the value of N in the equation 6.2n - 3.7n = 85+45 A.13.13 B.16 C.52 D.325 ...
A: 1. First of all, combine terms to get 2.5n = 130. You can multiply or divide both sides of an ...
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| algebra | 11/1/2006 |
Q: ------------------------------------------- -----Question-----Graph each of the following ...
A: For clarity you need to write it y = (3/4)x +2. That's the equation for a straight line and it only ...
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| Graph and Analyze Linear Functions | 10/29/2006 |
Q: The solutions of line m are (3, 3), (5, 5), (15, 15), (34, 34), (678, 678), and (1234, 1234). The ...
A: You only need two points to determine a line. The standard equation for a line is y =mx+b where m ...
|
| percentages | 10/26/2006 |
Q: so 5% is 1.05, 10% is 2.10, 15% is what? and 20% is 2.20so 20% is 2.05, 15% is 3.05 and 20% is 4.05? ...
A: I just realized that there are two ways to look at what you were asking. 1.05 is 5% of 21 so 2.10 ...
|
| Algebra | 10/24/2006 |
Q: median, and mode? if you could that would be nice so I hope you can :)
A: Generally, if the last number is 5 or greater you round up. So 16.75 becomes 16.8 and 17.74 becomes ...
|
| story problem inequalities | 10/23/2006 |
Q: I have some questions that are based on the following information. I would appreciate your answers ...
A: a. C <= 300 b. A(mount) <= 400 If you optimize the number of cages used and the amount of money ...
|
| physics | 10/22/2006 |
Q: ------------------------------------------- What is a hypotenuse and what is a adjacent side? Also ...
A: How can you take physics without having had trigonometry? Can you draw a right triangle? If the ...
|
| physics | 10/22/2006 |
Q: I do not understand the whole sin and cos thing. I have a question I am stuck on and I have to ...
A: Yes, you need a calculator or a table of sine values which we had to use before the days of ...
|
| algebra | 10/20/2006 |
Q: 3k-5=7k-21 I thought I understood when I left school, but I guess I didn.t Thanks
A: You can add or subtract the same quantity on both sides of an equals sign without changing the ...
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| trigonometry | 10/19/2006 |
Q: Which of the following angles are coterminal with 80? 800, -100, -280, 280 Can you please explain ...
A: Put the angles on a graph and you will see that 800 = 2(360) +80. 80 degrees and 800 degrees are ...
|
| word problem | 10/18/2006 |
Q: 1. A coffee shop wishes to sell a blend of a $2.50 per pound tea with a $3.25 per pound tea to ...
A: 1. Let x = lbs. of $2.50 tea and y = lbs. of $3.25 tea. Then x+y = 75 and 2.50x +3.25y = 3.00(75) ...
|
| coordinate geometry/algebra | 10/17/2006 |
Q: sorry im going to try and make this understandable because i cant copy a table into here so i will ...
A: The standard equation for a line is y = mx+b. It only takes two points to determine a straight line. ...
|
| algebra 2 | 10/11/2006 |
Q: 9x+5y-z=-11 6x+4y+2z=2 2x-2y+4z=4
A: First of all, divide the 2nd and 3rd eqns. by 2 to get 3x+2y+z = 1 and x-y+2z = 2 Now pick a ...
|
| Word Problems | 10/7/2006 |
Q: I don't mean to be a pain, but i'm not sure I understand the answer to question one. Could you ...
A: If the distance is directly proportional to the square of the time, then the equation is S = at^2 ...
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| Algebra! My Last Test! Help! | 10/3/2006 |
Q: I'm stumped on these questions. I just don't get these problems. Could you please Help? For this ...
A: x^2 -x = 1 x^2 -x +1/4 = 1+1/4 (x-1/2)^2 = 5/4 x-1/2 = +/-(1/2)5^1/2 x = 1/2 +/-(1/2)5^1/2 Surely ...
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| factoring | 9/11/2006 |
Q: Can this be factored? Because I can't factor it. Its from my textbook. My textbook wants me to solve ...
A: re-write it as f(x) = x^3+20x^2+133x+294. if x=a is a solution then f(a) = 0. in this case, ...
|
| Chemistry and Algebra 2 | 8/16/2006 |
Q: I guess I was looking for something that could help me link the 2 more directly as I will be ...
A: When you took chemistry didn't you use the ideal gas law, van der Waals's equation, calculate the ...
|
| help me...... | 8/13/2006 |
Q: can you pls hel me with this qustion? "using trigonometric ratios, find the degree measure of the ...
A: A rhombus is a parallelogram with equal sides. Since the perimeter is the sum of four sides, each ...
|
| probability | 8/8/2006 |
Q: Question 1: A number cube is rolled and a card is drawn from cards numbered 1-14. Find the number of ...
A: 1) 6 possible numbers, 14 possible cards, 84 possible outcomes. 2) the prime numbers are ...
|
| surface area | 8/8/2006 |
Q: The Khafre pyramid in Egypt has a square base that is 214.5 meters on each side, a height of 143.5 ...
A: First of all, your scale is 300:1 so you divide each dimension by 300 to get the size of your model. ...
|
| Word Problem Help | 8/6/2006 |
Q: I can't seem to figure these out; however, I think I am headed in the right direction. Can you help ...
A: 1) You have two equations, two unknowns, so you can solve for x and y. Since x = 5+y, you have ...
|
| Algebra Math Help | 8/5/2006 |
Q: The problems are written correctly; however, I will write them again in parenthesis. Reduce to ...
A: b) you need to write it 3/(4c+2) -(c-4)/(2c^2+c) -5/(6c) so the LCD is 6c(2c+1) and you have ...
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| Algebra Math Help | 8/5/2006 |
Q: Reduce to lowest terms. Show all work performed. a) x-1/x^2-x-12 = x+4/x^2+5x+6 b) 3/4c+2 - ...
A: a) for clarity, you need to write it (x-1)/(x^2-x-12) = (x+4)/(x^2+5x+6) x^2-x-12 = (x-4)(x+3) ...
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| HOW TO SOLVE THIS??? | 8/2/2006 |
Q: how do i write an equetion of the line for these 4 questions a(7.4) m=5 b(-3.-2) m=-1/2 c(3,-2) and ...
A: The standard equation for a line is y=mx+b where m is the slope and b is the y-intercept. 1. 4 = ...
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| Algebra - 35 yrs old | 8/1/2006 |
Q: 6.6 #64. 4w-1/3w+6 - w-1/3 = w-1/w+2 6.7 #40. c+3/c-1 = c+2/c-3
A: 6.6 For clarity, you need to write it (4w-1)/(3w+6) -(w-1)/3 = (w-1)/(w+2) The LCD is 3(w+2) so if ...
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| Algebra - 35 yrs old | 8/1/2006 |
Q: ¡¤ 6.6 Solve each equation. # 64) 4w ¨C 1 - w ¨C 1 = w ¨C 1 3w + 6 3 w + 2 ...
A: 6.6 and 6.7 Try writing them like 4w/(3w+6) so I can understand them 6.8 let w = wind speed time = ...
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| changing the subject | 7/27/2006 |
Q: Could you please define the term "to the correct number of significant figures"? Please provide ...
A: The number of significant figures indicates how accurately you know a value. 8 has one sig fig, 15 ...
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| Advanced Slope | 7/25/2006 |
Q: CAN U HELP ME USING THIS AS EXAMPLE 1.y = -5x + ½ The slope of this line is ½ True False ...
A: 1. the standard equation for a line is y=mx+b where m is the slope and b is the y-intercept. so m = ...
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| Algebra | 7/21/2006 |
Q: I'm 35 Could you please work the problems out so I can see how you do it. • 5.4. Factor each ...
A: 5.4 3x^2 -17x +10 = (3x-2)(x-5) 5.5 2(2a+1)(8a-3) 5.6 8w^2 +2w +1 = (4w-1)(2w+1) so w = 1/4, -1/2 ...
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| Finding pos and neg integers for a polynomial | 7/21/2006 |
Q: I am having some difficulty with the following problem. How do you find all positive and negative ...
A: The two factors have to be of the form (2h-a) and (h+c). If you multiply those together you get ...
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| Solving systems of linear equations | 7/20/2006 |
Q: ------------------------- 1)Find the LCD 1/5x-10 and 3/2x-4 2)solve for "m":t=mg-mf A)t(g+f) ...
A: 1) I presume you mean 1/(5x-10) and 3/(2x-4) so the LCD = 10(x-2) 2. m = t/(g-f), was that so hard? ...
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| Determining Volume and Surface Area | 7/20/2006 |
Q: and I am 18. I am having difficulty answering this::: The Khafre pyramid in Egypt has a square ...
A: So your model has a square base that is 71.5 cm on each side, a height of 47.83 cm, and a slant side ...
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| Algebra | 7/18/2006 |
Q: Help! I am so frustrated with these problems. I have been trying to work them out for 4 hours. What ...
A: 1. From the 1st eq. x = 23-3y Put that into the 2nd eq. to get 3(23-3y) -2y = 3 Solve for y and then ...
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| Third equation of motion | 7/17/2006 |
Q: I have a physics book by Peter Urone. I don't understand how to obtain the third equation of motion ...
A: You don't have the first equation quite right. S = (Vav)t where Vav is the average velocity for ...
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| math!!!Algebra..im stuck plzzz help..thank u sooo much | 7/16/2006 |
Q: (15 years old) solve for X: 3x+6=9-2x 3x+6-2x=9-2x 3x+6-2x-5=9-2x+3 x/2+3x=10 x/2+3x+5=10 ...
A: Let's look at your first equation. 3x+6 = 9-2x You can add or subtract a quantity from both sides of ...
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| Graphing | 7/12/2006 |
Q: Find the slope of the line y=x-2 Can't seem to understand the slope
A: Do you understand a ski slope? If you'd plot the line you would see that it increases at a 45 ...
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| algebra help | 7/11/2006 |
Q: These are some problems that I've difficulty solving, please help. 1. Solve: 6x+4(3x-2)=6x+2 2. ...
A: 1. Just multiply out and collect terms 6x +12x -8 = 6x +2 so 12x = 10 and x = 5/6 2. 10(x+5)(x-4) 3. ...
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| Geometric series | 7/11/2006 |
Q: What is Sn of the geometric series with a1=4, an=256, and n=4? A)84 B)260 C)336 D)340 I did this ...
A: No, you don't understand geometric series. If the first term is 4 then the next terms are 4r, ...
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| Algebra | 7/11/2006 |
Q: I'm having a hard time trying to solve this, please help me... For the function f(x)=3(x-1)/(x²-4) ...
A: a) they didn't do domains when I took algebra b) x=1 c) x=1 e) at x=2 and x=-2 f) I can't graph it ...
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| algebra | 7/10/2006 |
Q: how do you solve 2x+3=9 i am 34 years old
A: you can add or subtract the same thing from both sides of an equals sign without changing the ...
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| Algebra Questions | 7/9/2006 |
Q: Given a line containing the points (1,4), (2,7), and (3,10) determine the slope-intercept form of ...
A: the standard equation for a line is y = mx+b, where m is the slope and b is the y-intercept. since ...
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| Algebra Questions | 7/8/2006 |
Q: In most businesses, increasing prices of their product can have a negative effect on the number of ...
A: 1) Let I = income and n = no. of $0.25 increases I = (800-40n)(2.25+0.25n) = 1800+110n-10n^2 This is ...
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| Algebra | 7/8/2006 |
Q: I am 20 years old and I am a math tutor. I am having difficulty teaching my student about graphing ...
A: well, you can always change it to 5y = 2+7x but that's not really necessary for graphing. just put ...
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| Algebra II polynomials | 7/6/2006 |
Q: 1) How many imaginary zeros does the function f(x)=(3x^4)+(2x^3)+(4x)+(7) have? 2)How many ...
A: 1) you don't have to use parentheses. You can write it f(x) = 3x^4 +2x^3 +4x +7 If x=a is a ...
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| Elementary Algebra | 6/28/2006 |
Q: these problems needs to be factored completely if you could show me the steps it makes it alot ...
A: 1. the factors are going to be of the form (ax+b)(cx+d) where you know that ac = 7 and bd = 18 so ...
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| Algebra help | 6/27/2006 |
Q: Please help me! Find all values of b in the following equations that will give one or more real ...
A: Let's look at (d) first. Any equation has solutions. In the standard form ax^2 +bx +c = 0, if ...
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| math | 6/26/2006 |
Q: how do you do 3x+7=3
A: you can add or subtract the same thing from both sides of an equals sign without changing the ...
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| Polynomials, square roots & radicals | 6/21/2006 |
Q: How would you explain square roots, cube roots, nth roots, and radicals to a student who is having ...
A: If you have a number, then there are two equal numbers which, when multiplied together to give that ...
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| Algebra help | 6/21/2006 |
Q: I really need help with these problems that I don't understand: 1.) Evaluate 8=2x5-24/6x2 ( the ...
A: 1) I presume you mean 8 = (2x^5-24)/(6x^2) If that's the case, you can re-write it f(x) = 2x^5 ...
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| algebra help | 6/20/2006 |
Q: I don't understand how to work these problems, please help! 1.) This is a radical equation and the ...
A: the radical sign is a square root sign and you indicate it as x^1/2, for example. 1)I don't know ...
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| Factorization | 6/19/2006 |
Q: Now how to we factor this equation: t4 + 10t2 +35t3 +50t +24/t2+7t+12. Thanks
A: Well, it's easy to factor t^2+7t+12. That's (t+3)(t+4). So you might assume that at least one of ...
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| Factorization | 6/19/2006 |
Q: ------------------------- How did you divide y+2 into y^3-19y-30 and you get y^2-2y-15. I don't ...
A: Do you remember how to do long division? This is the same. the first term is y^2 so you multiply ...
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| Solving equations using balance method | 6/19/2006 |
Q: Help an poor parent... 4(2x -5) = 3x -10 Thank you, Debbie
A: First of all, multiply the terms out on the left to get 8x -20 = 3x -10 Now, you can add or subtract ...
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| Algebra | 6/17/2006 |
Q: Please help me solve: Solve for L. S=n/2(a+L) and Solve the inequality. -5x-20<-25 ...
A: I assume you mean S = (n/2)(a+L) and not S = n/[2(a+L)] so 2S = n(a+L) = na+nL nL = 2S-na and L = ...
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| Algebra help for the confused! | 6/15/2006 |
Q: Help! These problems are confusing. 1.) x/6 - x/8= 1 ( the slant means division) 2.) x/x-2 - x+1/x ...
A: 1) multiply each term by 24 to get 4x-3x = 24 so x = 24 2) for clarity you need to write it x/(x-2) ...
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| equation of line | 6/15/2006 |
Q: Here's two problems I'm having difficulty with for some reason. Please help! Thanks so much! ...
A: The general form is y=mx+b so you have 3=m+b and 2=-m+b so your equation is y = (1/2)x+5/2 or 2y = ...
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| inter. & elem. algebra | 6/14/2006 |
Q: 2x=2y+4 i dont understand the steps to these types of questions (solving linear equations.) is ther ...
A: the standard equation for a straight line is y = mx+b, where m is the slope and b is the ...
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| Help | 6/13/2006 |
Q: im in algebra 1 and my teacher does not teach us this material and im getting very frustrated heres ...
A: first of all, multiply out the terms 3x+6 -5x^2 +16x^2 +x^2 +2x = 12x^2 +5x +6 to graph any equation ...
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| algebra 1 | 6/13/2006 |
Q: these are some of the problems ive been having trouble with.maybe you can help 1) find the L.C.D. ...
A: 1) 5ab 2) re-write each of them in standard form, y = mx+b, where m is the slope. a) slope is the ...
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| simplest radical form | 6/13/2006 |
Q: im supposed to express these in simplest radical form.any ideia? sqrt=square root 1)sqrt 25a^2b^2 ...
A: you can write sqrt x as x^1/2 1) 5ab 2) 5x(2^1/2) 3) (3/5)^1/2 cannot simplify 4) 18(35^1/2) 5) ...
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| Problems involving probability and other rational expressions | 6/11/2006 |
Q: I need help on these following problems, I need to know to do the set-up and the first few steps ...
A: 1. 1/50 +1/x = 1/30 so x = 75 min 2. 1/5 -1/20 = 1/x so x = 20/3 hours 3. 1/3 +1/4 + 1/x so x = 12/7 ...
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| x,y : p | 6/11/2006 |
Q: these problems are killing me.help 10x^2-30x+20/x^2-1 36x/-12 find the slope and y intercept of ...
A: 1. 10(x-2)(x-1)/[(x+1)(x-1)] = 10(x-2)/(x+1) 2. -3x 3. re-write it y = (5/2)x -3/2 so the slope = ...
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| ?confused | 6/11/2006 |
Q: ive been stuck on the following problems.can you help:\ for the function f(0)=x^2-2x+1 1. find ...
A: The function should be f(x) = x^2 -2x +1 1. f(0) = 1 2. x^2 -2x +1 = 0 = (x-1)^2 so x = 1 3. x^2 ...
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| Algebra 2 | 6/8/2006 |
Q: I don't know how to solve the following functions: 1.If f(x)=x^2+2x+3 and g(x)=2x-5 solve for ...
A: 1. g+f(x) = x^2+4x-2, f-g(x) = x^2+8 2a. I presume you mean f(x) = 2^(x+1). I can't graph it for ...
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| algebra | 6/6/2006 |
Q: please help me with this question-no one can answer it! A pilot, attempting to fly from Middletown ...
A: You have a triangle with three sides, 200,180 and 35. You want to find the angle opposite the 35 ...
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| Algebra 2 Simplify | 6/6/2006 |
Q: x^7 - 3x^5 - 2x^6 + 6x^4 + 27x^3 - 81x -54x^2 +162 ------------------------------------------------- ...
A: the only way to deal with such expressions is to re-write them as f(x) = ...
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| please can i get help with Algebra and do it step by step!?! | 6/5/2006 |
Q: 1.solve for x. a.0=x+(-12) b.1/4x=12 c.2x-5+5=2x d.2/3x=-4/3 2.simplify a.3(x+1)+4 ...
A: You can add or subtract the same thing from both sides of an equals sign without changing the ...
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| trigonometry | 6/4/2006 |
Q: i really need help on thisthe path traveled by a golf ball hit with a 9-iron can be modeled with the ...
A: B. If you're allowed to use calculus, you can take the derivative, set it equal to 0, and solve for ...
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| algebra question | 5/23/2006 |
Q: Could you please break down the following for me? I can't find an example on the net: ab/c=d solve ...
A: you can multiply or divide both sides of an equals sign without changing the result. so you multiply ...
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| algebra | 4/26/2006 |
Q: 1.) t-2/4-t - t+4/t+4 + t-3/(16-t squared) 2.)(-)5/6 - 9/7x 3.) 8/x+8 - 8/x-8 4.) one printer can ...
A: 1) It sure would help if you used some parentheses. (t-2)/(4-t) +(-t+4)/(t+4) +(t-3)/[(4+t)(4-t)] ...
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| algebra | 4/26/2006 |
Q: my name is Ian Sim and I am a freshman in Stevenson High School in Lincolnshire ILL. I am currently ...
A: 1. Look for a little radical sign over an x. Mine is the second function for the x^2 key. 2. You ...
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| algebra | 4/24/2006 |
Q: I dont know if you can help me with these problems, but I dont know how to graph these. I can only ...
A: 1) Put in a value for x, calculate f(x) and plot. For example, f(0) = 4/3, f(1) = 5/4, f(-1) = 3/2, ...
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| probability | 4/10/2006 |
Q: Sam and Allen have applied for scholarships. The probability that Sam gets a scholarship is 0.89 and ...
A: Your numbers don't quite add up. If the two probabilities are 0.89 and 0.81, then the probability ...
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| Simplifying Rational Equations | 4/4/2006 |
Q: Please! I need help answering these 7 questions: 1) -6a/5 * 1/6a^2 2) 8a/7b * 7a^2/-2 3) 5s/-2t * ...
A: 1) you can also write it (-6a/5)[1/(6a^2)] which = -1/(5a) 2) -4a^3/b 3) -3s^2/t 4) you need to ...
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| Please Help...... :-) | 3/23/2006 |
Q: I have a couple questions for you again..... sorry I am really trying.... 1) Find the slope that ...
A: Most of these are variations of the same thing. The standard equation for a line is y=mx+b where m ...
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| algebra | 3/21/2006 |
Q: what is the answer to 3y+3=-3 and how can I not forget how to check the answers?
A: you can add or subtract the same thing from both sides of an equals sign without changing the ...
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| milikans experiment | 3/11/2006 |
Q: A negatively charged oil drop in a milikan oil drop apparatus is observed to fall 1.0mm in a time of ...
A: Well, you obviously have a book containing the equation for the viscous drag. Doesn't it also have ...
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| algebra | 3/11/2006 |
Q: I have some questions for your review.Thank you! 1)Solve this quadratic inequality: x^2 - x <6 ...
A: 1) -2 < x < 3 2) x < -2 or x > 2 3)a) -3 < x < 7 b) x^2 ...
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| Gaussian Elimination, Am I correct? | 3/8/2006 |
Q: Raridon, I found this (solved) problem in my textbook: 2x + y - 3z = 1 5x + 2y - 6z = 5 3x + y + 4z= ...
A: One way to see if you got the correct answers is to put the values back into the original equations. ...
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| graphs | 3/6/2006 |
Q: I'm having problems with graphs but I dont know how to post questions on this seeing that you cannot ...
A: Before the days of graphing calculators we had to do things by hand. You can still do it. Simply ...
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| Algebra 1 | 3/2/2006 |
Q: My friend has a son that needs help with math. I tryed to help and found that the best way I can ...
A: I've been working algebra problems for 60 years and I don't know any specific formulas to list. I'd ...
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| algebra | 2/26/2006 |
Q: 1.) -3x+y=14 *find the y-intercept of the line. 2.) 5x-20y=0 *find the x- and y- intercepts for the ...
A: 1) the standard equation for a line is y=mx+b where m is the slope and b is the y-intercept. so ...
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| Algebra FINAL question | 2/25/2006 |
Q: 1. Write an equation of the direct variation that includes the point 9,-12 Find the slop of the ...
A: 1. y = -2x+6 7 = m+b and 1 = 10m+b so m= -2/3, b = 23/3 and your equation is 3y = -2x+23 2. for ...
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| Identical Variables | 2/15/2006 |
Q: How is the answer determined for the following? 10x - 14 = 3x Answer: x = 2
A: You can subtract or add the same thing to both sides of an equation without changing the result. So ...
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| algebra | 2/13/2006 |
Q: A ball is thrown into the air in such a way that its height at any time, t, is given by the function ...
A: h'(t) gives you the velocity of the ball which, of course, is zero at the top of its flight. So ...
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| logarithmic/exponential forms | 2/8/2006 |
Q: Here are a few questions for you. 1)write the equation in logarithmic form for: a)3^2=9 b)27^2/3=9 ...
A: Your answer to #3 was not right. You can check it by putting c=2, calculating d and seeing that c^d ...
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| Help | 2/6/2006 |
Q: For the points P and Q, find (a) the distance d(P,Q) and (b) the coordinates of the midpoint of the ...
A: 1) diff in x = 6, diff in y = 8, distance = (6^2+8^2)^1/2 = 10; midpoint = -1,-1 2) If you want to ...
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| algebra help needed | 2/6/2006 |
Q: Your with the following questions would be greatly appreciated, Thank you very much. mark 1.)Of 40L ...
A: 1) 40(0.75) = 30L 2) let the sides be x, 2x and 2x so 5x=30, x = 6cm 3) time = distance/speed so 32 ...
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| Algebra | 2/5/2006 |
Q: I need help with completing this square please. 3x^2 -4x -6 = 0 Can you show me the steps so that ...
A: assume that you need (ax+b)^2 which equals a^2x^2 +2abx +b^2. If you compare terms you'll see that ...
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| algebra | 2/4/2006 |
Q: I am baffled on these, can you show me how to work them please? -------- v(3x+6) = 4 2.) ...
A: For the first one all I got was v(3x+6)=4. The only thing you can do with that is solve for v or x. ...
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| Algebra | 2/3/2006 |
Q: v/v+9 + v/v+1 = 1 Can you please show me how to work this type of problem? I am in way over my ...
A: First of all, to make it clearer you need to write it v/(v+9) + v/(v+1) = 1 For problems of this ...
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| please explain | 2/2/2006 |
Q: lesson 26 (11) can you please explain this one to me 3y-y+2y-5=7-2y+5 please explain it step by ...
A: First of all you combine terms to get 4y-5 = 12-2y You can add or subtract the same thing from both ...
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| Algebra 2 | 1/23/2006 |
Q: 1. a+2b+3c=6 b+2c=0 c=2 2. x+y+z=2 x+2z=5 2x+y-z=-1 3. x-3y+2z=11 ...
A: 1. you can put c=2 in the 2nd eq. to get b = -4. put both of them in the 1st eq. to get a. 2. ...
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| ALGEBRA | 1/23/2006 |
Q: 1.)FIND THE DECIMAL NOTATION. -5/6 2.)WHATS THE MOST APPROPIATE TRANSLATION OF THE QUESTION. ...
A: 1) -5/6 = -0.8333 2) a. 45 = 0.23x so x = 195.6 b. 86(100)/90 = 95.56% c. 58(100)/71 = 81.69% 3. ...
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| I NEED HELP!!!!!!!!!!!!!!!!!! | 1/19/2006 |
Q: PLEASE GIVE ME HESE ANSWERS BY 2 NITE PLEZZZZZZZZZZZ IT'S DUE 2MARA AT 11:00 AM AND IM FAILING I ...
A: 1. 5c^2 _2c^2 +3c^2 +4c^2 = 14c^2 2. 15m^3/(5m) = 3m^2 3. (3x)(2x^2y)(2y) = 12x^3y^2 4. n^2 -n -10 ...
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| solve by graphing | 1/18/2006 |
Q: x+y=6 x-y=2
A: These are both straight lines. It only takes two points to plot a straight line. So for x+y=6 you ...
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| ALGEBRA 1 | 1/16/2006 |
Q: Can you please help me? I am doing substitutions and these are three problems that I cannot solve! I ...
A: 1. substitute y from the 1st eq. into the 2nd to get 2x+1 = -3x+2, solve for x and then y 2. I ...
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| solve by completing the square | 12/16/2005 |
Q: -x^+4x-1=0 & m^=2/3m+4/9 ^=square /=franction
A: You can write them -x^2 +4x -1 = 0 and m^2 = (2/3)m +4/9 1. re-write it x^2 -4x +1 = 0 add 3 to each ...
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| algebra word problem | 12/16/2005 |
Q: -could you please show me how you arrived at this, I have to work the problem out completely, that ...
A: When John has caught up with Martina they both will have gone the same distance. since distance = ...
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| College Algebra | 12/15/2005 |
Q: can you show me how you got these answers...oh and by the way, you're quick! JeannineAn open box ...
A: I'm not always that prompt but I was logged on to check my mail. I've worked problems like that ...
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| adding rational expressions | 12/15/2005 |
Q: 2x/x^-16 - 3/x^+8x+16 ^=square /=over
A: You can write it 2x/(x^2-16) -3/(x^2+8x+16) You need the parentheses because otherwise it could be ...
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| Algebra | 12/14/2005 |
Q: How would you solve this eguation 7-2n=n-14?
A: You can add or subtract the same thing from both sides of an equation without changing the results. ...
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| find a formula for an for the arithmetic sequence | 12/1/2005 |
Q: an= lower n like nth power but lower a1(1 also lower)a1= 9 a11( 11 lower) a11=14
A: The standard equation for an arithmetic sequence is a(n) = a0 +dn where a0 is the initial term, n ...
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| help! | 11/27/2005 |
Q: Two buildings are seperated by an alley. Tom is looking out of a window 60 feet above the ground in ...
A: If you draw a picture you'll see that you have two triangles with a common side that is the distance ...
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| algebra | 11/21/2005 |
Q: could you pls show the steps involved in solving these partial fraction decompositions? There are 6 ...
A: 1. (1-x)/[x(2x+1)] nothing more you can do with that unless you want to split it out to 1/[x(2x+1)] ...
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| pre-algerbra | 11/21/2005 |
Q: 1.12-4n=4 2. 7+ k/4=9
A: You can add or subtract the same thing from both sides of an equals sign without changing the ...
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| Rearranging Equations & Formulae | 11/17/2005 |
Q: I need these for review so I can figure out how to do these on my own. The questions are: Find The ...
A: The standard equation for a straight line is y=mx+b where m is the slope and b is the y-intercept So ...
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| algebra | 11/13/2005 |
Q: Can you answer this? I'm stuck! Find all real zeros of the function f(x)= -4x to the 4th -40x to ...
A: You can plot the function by putting in values for x, calculating f(x) and then plotting f(x) vs. x. ...
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| algebra | 11/13/2005 |
Q: #1- investement of 27,000.00 in 2 bonds 7% and 9% how much is invested in each if annual income frm ...
A: 1. Let x = amt. invested at 7% and y = amt. invested at 9%. Then x+y = 27000 and 0.07x +0.09y = 2130 ...
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| "Regarding Help with College Algebra on Solving Matrices" | 11/11/2005 |
Q: Raridon, Good evening. I am contacting you to ask if you can help me with some difficulty ...
A: Well, I don't know what MathCAD does but you can solve these equations using determinants or the old ...
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| transverse waves | 11/6/2005 |
Q: why can transverse waves be thought of as two waves a wave in time and a wave in space?
A: It's really just one wave but you can consider it mathematically two ways. Have you been to a beach ...
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| help | 11/3/2005 |
Q: here in Venezuela my son is begining to study 1st. year of high school, he is 12 and in order to ...
A: Here in the US we have mathematics competition for 7th and 8th graders called MathCounts. You can ...
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| physics | 10/21/2005 |
Q: inelastic & elastic collisons, formulas that I can't break down. These are for extra credit in my ...
A: It's a little confusing because of the way you wrote them. Ordinarily, f and i are subscripts, not ...
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| Net Force | 10/20/2005 |
Q: I'm clueless in Physis: Can you help me find the Net Force of an object: Find the net force by a ...
A: Forces are vector quantities which means they have both magnitude and direction and have to be added ...
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| graphing | 10/19/2005 |
Q: The graph of a quadratic function can have 0, 1, or 2 x intercepts. How can you predict the number ...
A: a quadratic equation has the form ax^2 +bx +c = 0 calculate the radical b^2 -4ac. if that is zero, ...
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| Trig | 10/17/2005 |
Q: Give an exact value and draw a reference triangle 1) Sin(inverse of cos3/4) 2) Cos(inverse ...
A: You can write the inverse of cos(3/4) as cos^-1(3/4). It simply means "what angle has a cosine of ...
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| Graph formula | 10/17/2005 |
Q: I'm working with a scatter graph with trend line. Formula for trend line is the folloiwng: y = ...
A: That's a straight line so there's no problem calculating where the vertical lines intersect the ...
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| algebra help, asap | 10/12/2005 |
Q: I have a few questions please. 1.) for #1, graph the system of equations. 2y+x=2 x-y=5 ...
A: 1. They're both straight lines. It only takes two points to draw a straight line. Pick a value for ...
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| Algebra 2 | 10/12/2005 |
Q: Ok this is a tuffy so here goes! x-y+z=10 x(squared) + y(squared) + z(squared)=100 x(cubed) + ...
A: You could have written them x-y+z=10 x^2 +y^2 +z^2 = 100 x^3 +y^3 +z^3 = 500 I don't believe it can ...
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| -------------------------
... | 10/5/2005 |
Q: When factoring a trinomial, why is it necessary to write the trinomial is 4 terms? (Iam an algebra ...
A: I just made that one up and it can't be factored. Look at x^3 -2x^2 -5x +6 = 0 re-write it as f(x) ...
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| algebra-slopes | 9/22/2005 |
Q: solve and graph x + 3y=6
A: the standard equation for a line is y=mx+b so if you re-write that you get y = (-1/3)x +2 and the ...
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| Solve by using the quadratic formula | 9/18/2005 |
Q: 1) 3(x squared-4)-5x=o 2) x squared /2= 11- 3x/4 3) x squared-2x=3 4) If the square of a ...
A: 1) 3(x^2 -4) -5x = 3x^2 -5x -12 = 0 = (3x+4)(x-3) so x = 3, -4/3 2) x^2/2 = 11 -3x/4 so 2x^2 +3x-44 ...
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| algrebra | 8/29/2005 |
Q: A cubic model for the yearly worldwide carbon emissions is W=-0.054x^3+289x^2+739x+1576 where W is ...
A: I don't know what synthetic division has to do with it. You can just put in x=50 and evaluate W = ...
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| algebra | 8/29/2005 |
Q: ------------------------- thanks so much it's been 15 years since i've taken algebra. just a few ...
A: The standard equation for a line is y=mx+b where m is the slope and b is the y-intercept. Put in ...
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| algebra | 8/29/2005 |
Q: the equation of a line passing through each given points with the indicated slope.give results in ...
A: The standard equation for a line is y=mx+b where m is the slope and b is the y-intercept. Since ...
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| math/algebra | 8/27/2005 |
Q: ok...lets cut the crap... i have typing in my questions and people keep on writeing back "SORRY bla ...
A: 5. Let the numbers be x and y. Then x+y = 25 and 7y-3x = 15. So the numbers are x=16 and y=9 8. You ...
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| physics | 8/14/2005 |
Q: A square piece of each side 'a'units long is heated from 0 degree centegrade to t degree ...
A: You can't do that. You lost the "t". L = L0(1+at) where a=alpha area = L^2 = [L0(1+at)]^2 = ...
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| Quadratic equation.... | 8/4/2005 |
Q: Find the equation of the axis of symmetry and the coordinates of the vertex of the graph of each ...
A: A quadratic function is what you have - one variable is a function of the square of the other ...
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| graphing a system of equations | 7/27/2005 |
Q: how would i graph this system of equations.. 3x+y=-4 6x+2y=-8 thank you
A: Both of these are straight lines. It only takes two points to determine a straight line. So put in ...
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| graphing a system of equations. | 7/26/2005 |
Q: how would i graph: x+2y=3 3x-y=-5 And how many solutions does this have? thanks
A: Both of these are straight lines. It only takes two points to draw a straight line. So you put in ...
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| graphing | 7/24/2005 |
Q: i'm not sure how to graph x+y=4 x+y=9 Thank you so much for the help!
A: These are both straight lines. It only takes two points to determine a straight line. So you put ...
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| chemistry | 7/14/2005 |
Q: what dooes phospate mineral function do? and Mercury? Thank You.
A: There are different phosphate minerals from which the element phosphorus is obtained. Phosphorus is ...
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| simplifying polynomials | 7/5/2005 |
Q: 1)(5k2+3k-2)-(8k+7k+2)+(10k2+9k-5) 2)(3/4x4+1/8x2-3/16)+(5/4x2+7/8x+5/16) ...
A: 1) Clear out the () and combine terms 5k^2 +3k -2 -8k -7k -2 +10k^2 +9k -5 = 15k^2 -12k -9 2) I ...
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| algebra help | 6/30/2005 |
Q: what is 4x-5<2(x-3)
A: 4x-5 < 2x-6 you can add or subtract the same thing from both sides without changing the inequality ...
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| on beyond quadratic | 6/29/2005 |
Q: I have one student who is extremely bright and always asks the most intriguing questions. When I was ...
A: I don't know of any formula. The way I solve equations like that is to re-write them as f(x) = ...
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| algebra - graphing | 6/21/2005 |
Q: hey,i dont at all know how to graph 4x+2y=6 x-y=3 I dont even know if its one question or two, its ...
A: You have two straight lines. It only takes two points to graph a straight line. Re-write the 1st ...
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| half lives | 6/21/2005 |
Q: If a scientist purifies 1.0 gram of radium-226, how many years must pass before only 0.50 gram of ...
A: The half-life of Ra-226 is 1600 years. The definition of half-life is the time for one half of a ...
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| Birthday paradox | 6/8/2005 |
Q: What is the probability that at least two people from 24 people have the same birthday? (Assume 365 ...
A: You have to calculate the probability that none of the people have the same birthday and then ...
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| MATH ALGEBRA | 5/17/2005 |
Q: I AM DOING A PROJECT FOR MY CLASS AND I HAVE TO INCLUDE A GRAPH AND TABLE IN MY PAPER. THE GRAPH ...
A: A graph is simply a plot of one variable against another. For example, you could measure the ...
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| algebra | 5/11/2005 |
Q: please show me work..please 1.If Sally can paint a house in 4 hours, and John can paint the same ...
A: 1. 1/4 +1/6 = 1/x so x = 12/5 hours 2. x(0.8) = 12590, solve for x 3. S+S+6+S+11 = 41, S = 8 years ...
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| Algebra | 5/11/2005 |
Q: I'm trying to figure out (x-2y) to the third power. Can you help me? Thanks!
A: Sure, just multiply them together, (x-2y)(x-2y)(x-2y). multiply the first two and you get ...
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| algebra | 4/22/2005 |
Q: solve the equations. Please show me how you found the answer step by step. 1. (1/27)^2x+1 = 9^3x-6 ...
A: 1. To be clear you need to write this (1/27)^(2x+1) = 9^(3x-6) (2x+1)log(1/27) = (3x-6)log(9) so x ...
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| history of algebra | 4/19/2005 |
Q: For variables, why is the “known” variable, x. What is so special about x. What is the origin of the ...
A: There's nothing special about "x". You could use any variable. Somehow, "x" has become associated ...
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| Identifying non-linear equations | 4/18/2005 |
Q: 3x^2 + 5x + 3y^2 + 4y + 7 = 0 How do I find out whether the equation is a parabola, circle, ...
A: A parabola would have only one variable squared. A circle would be symmetric. A hyperbola would have ...
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| math | 4/18/2005 |
Q: determine the amplitude and period of each function. 1)y= cos 4 x 2)y= 5 cos 2 pi x 3)y= -3 cos 1/3 ...
A: The standard equation is y = Acos[(2pi/T)x +B] where A is the amplitude, T is the period and B is ...
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| algebra | 4/18/2005 |
Q: Part 1: Exponential Decay Did the whales swim or walk to Michigan??? In the late 1920s and early ...
A: 1. A = 918e^(-0.693t/T) where T = half-life 2. 838 = 918e^(-0.693t/5730) so t = 754 years 3. 841 = ...
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| math | 4/11/2005 |
Q: Determine the amplitude and period of each function. Then graph one period of the function. (1)y=sin ...
A: The standard equation is Y= Asin[(2pi/T)x +B] where A is the amplitude, T is the period and B is the ...
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| algebra help | 4/3/2005 |
Q: Your question was if A= -1 -5 -8 and B= -6 8 1 0 9 5 -2 4 6 -9 -4 2 ...
A: I would assume you had learned how to evaluate a determinant or you wouldn't have been given these ...
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| math | 4/1/2005 |
Q: .. i have a few questions here... Find the exact value of each of the remaining trigonometric ...
A: It's called theta, the 8th letter of the Greek alphabet. Mathematicians and physicists use a lot of ...
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| algebra | 3/31/2005 |
Q: I'm extremely sorry about the hard to understand questions on the previous question, the computer ...
A: 18^1/2 +50^1/2 = 3(2^1/2) +5(2^1/2) = 8(2^1/2) 48^1/2 -27^1/2 = 4(3^1/2) -3(3^1/2) = 3^1/2 2(8^1/2) ...
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| trignometry word problem-ship | 3/31/2005 |
Q: 1) a ship proceeds on a course of 280 degrees for 3 hours at a speed of 12 knots, then changes to a ...
A: I presume you know about sines and cosines. Think of the ship's course as a vector that you need to ...
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| math | 3/30/2005 |
Q: These are acute angles and sin and cos are given. use identities to find tan, scs, sec, and cot. ...
A: 1) tan=3/4, csc=5/3, sec=5/4, cot=4/3 2) You need to write it (5^1/2)/3 tan=2(5^1/2)/5, csc=3/2, ...
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| math | 3/28/2005 |
Q: I am in way over my head with this math.these problems are very hard for me if you can get these i ...
A: complimentary angles add up to 90 degrees supplementary angles add up to 180 degrees 1) comp = 5, ...
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| algebra | 3/28/2005 |
Q: ------------------------- Please asssist with the following: * Solve each equation: 1) square root ...
A: You need to use parentheses 1) I presume you mean (5x+1)^1/2 = 7-x square both sides to get 5x+1 = ...
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| derive | 3/23/2005 |
Q: (ax)squared+bx+c=0 drive to get -b+ square root of b + 4ac - all over 2a
A: re-write it as x^2 +(b/a)x = -c/a complete the square by adding [b/(2a)]^2 to each side to get x^2 ...
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| algebra | 3/20/2005 |
Q: graph the equationwith the y-intercept 3x-4. use the coordinate plane at the right.
A: Your question is not clear. Do you mean y=3x-4? This is a straight line. It only takes two points ...
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| law of sines | 3/17/2005 |
Q: 1) how many different triangles PQR can be constructed using the given information? a. p=5, q=4, ...
A: 1)a. can't do it. 4/sin(74) = 5/sin(P) and sin(P) > 1 b. Q = 20.3 degrees and 3rd angle = 136.7 ...
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| Need some help on college algebra | 3/14/2005 |
Q: 1. IF F(X) = 16 -x squared and g (x) = 4- x. find (f-g), (x) 2. solve z cubed - 4z squared - 15 z + ...
A: Here's some of them. For a few, the question was not clear. 1. f(x)-g(x) = 12-x^2+x 2. 4-i is also ...
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| expressions algebra | 3/10/2005 |
Q: 12n+2-3n=5-(n-2)
A: First of all, you combine terms to get 9n+2 = 7-n You can add or subtract the same thing from both ...
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| pre algebra | 3/8/2005 |
Q: -8=-3m+2+5m
A: You can add or subtract the same thing to both sides of an equals sign without changing the answer. ...
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| Polynomial | 3/7/2005 |
Q: 2 questions actually... :) 1. x4-x3+x-1=0 DO I factor by dividing two sect. ie (x4+x3)+... Cannot ...
A: 1. No, you factor it by finding factors. Re-write it as f(x) = x^4-x^3+x-1 pick some value for x and ...
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| solving system of equations with 3 variables | 2/27/2005 |
Q: I'm in the matrices unit of my course however we have to solve for three variables using system of ...
A: I assume you know how to evaluate matrices and determinants. the denominator determinant is 2 1 2 1 ...
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| algebra... test tomorrow.. help!! | 2/27/2005 |
Q: I have to solve the following equation to the nearest 0.1 5-x(cubed) = 2x (squared) ...
A: 1. re-write it as f(x) = x^3 +2x^2 -5 If a value of x is a solution, f(x) = 0 f(0) = -5 f(1) = -2 ...
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| circuits | 2/27/2005 |
Q: Ok I have got a circuit with three cells cell 1 has an emf of 6v and a internal ressistance of 2 ...
A: I presume all of these are simply connected together in a single series circuit. If so, you almost ...
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| Mathematics | 2/23/2005 |
Q: Respected Sir, Assalamoalekum, Sir my question is: "What is the value of zero ...
A: 0! does equal 1. It comes from a gamma function in higher mathematics. Even more interesting is ...
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| algebra | 2/21/2005 |
Q: Struggling really bad with these problems! 1)the rock will be 99ft high after 1.5 seconds after its ...
A: 1) a) find the no. of seconds first t = 90/32 = 2.8125 s H = v0t -(1/2)gt^2 = 90(2.8125) ...
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| factoring a cubic | 2/20/2005 |
Q: I understand what you did to the previous cubed power with grouping, but you can't use that for ...
A: The trick is to find one factor. Write it f(x) = x^3 +x^2 +x -3 then put in values of x until you ...
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| algebra | 2/16/2005 |
Q: I'm trying to solve these followign problems for a week, but I can't figure it out. 1. A balloon, in ...
A: 1 a) r(t) = 3t b) V(t) = 36(pi)t^3 c) V(3) = 3054 in^3 d) 12000 = 36(pi)t^3 so t = 4.73s 2 a) r(t) = ...
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| Two problems | 2/15/2005 |
Q: THE first question is how to add vectors? The second question is how to graph a quadratic equation? ...
A: Usually you break each vector into its x and y components, add the x components, add the y ...
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| equations | 2/15/2005 |
Q: please explain 3-4b=10b+10 also 7d-13=3d+7 and one more please 12+1.5a=3a
A: You can add or subtract the same thing from both sides of an equals sign without changing the ...
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| Algebra 2 | 2/10/2005 |
Q: I was wondering if you know how to simplify expressions with fractional exponents? If so would you ...
A: 1. It's only a square root sign if there's no number in front. In this case, it's a cube root which ...
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| hard polynomials | 2/8/2005 |
Q: (x^3-1)/(x-1) I know the answer is x^2 +x +1,however I don't understand how to get that. One reason ...
A: Your teacher was right. You can do it like regular long division. x into x^3 gives you x^2 so you ...
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| circuits | 2/6/2005 |
Q: A circuit was set up to investigate the current through a 15 ohm resistor with applied pd .a 6 volt ...
A: With the rheostat in series it can go from 0 to 45 ohms. With the value at 0, the whole 6 volt ...
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| circuits | 2/6/2005 |
Q: A circuit was set up to investigate the current through a 15 ohm resistor with applied pd .a 6 volt ...
A: I assume the rheostat was in series with the 6 volt supply and the resistor. In that case, the ...
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| I cant get the answer | 2/1/2005 |
Q: Problem : X+1/2 < 1/8 My answer is X < -3
A: You can add or subtract the same thing from both sides of an inequality without changing the answer. ...
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| USING THE ADDITION METHOD | 1/31/2005 |
Q: Can you help with the below equations? I learned to do the addition method but now the x and y ...
A: The order of the variables doesn't matter. 1) multiply the first equation by 2 to get 6x-4y=2. add ...
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| algebra | 1/29/2005 |
Q: 1) by just looking at an equation, how do you find the x-intercept of a function? how do you find ...
A: 1) To find the x-intercept, set y=0. To find the y-intercept, set x=0. 2) the equation for a line ...
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| algebra | 1/29/2005 |
Q: 1)Two cars leave Baton Rouge at the same time and travel east on I-10. One travels at a constant ...
A: 1) Since the difference in speed is 8mph, each hour they get 8 miles further apart. Therefore, they ...
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| algebra | 1/28/2005 |
Q: 1)it says ina few sentences , describe when we interpret the slope, what is that we are describing? ...
A: 1) the slope is the rate of change of one variable with respect to another. For a straight line, ...
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| algebra | 1/28/2005 |
Q: 1. Can every line be written in slope-intercept form? Explain. 2. Does every line have two distinct ...
A: 1. yes, y = mx+b 2. no, a vertical or horizontal line will have only one intercept. 3. no, any ...
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| algebra | 1/28/2005 |
Q: find each formula fro the specified variable. 1) S=2LW + 2WH + 2HL + for H 2) S = 2pirh + 2pir^2 for ...
A: 1) H = (S-2LW)/(2W+2L) 2) h = (S-2pir^2)/(2pir) 3) what h? 1) L = 2W-3 and 2L+2W = 54 so W=10 and ...
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| Cot, Csc, Sec | 1/23/2005 |
Q: sorry, i forgot to include this with the problem 0 < x < (pi/2) does that mean "x" has to be in ...
A: If you have 0 < x < pi/2, that generally means to give the answer in radians. So for csc(x) = 5, ...
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| Cot, Csc, Sec | 1/23/2005 |
Q: If tan(x) = -5/12 and tan(x) also equals (sin(x))/(cos(x)), then how come sin(x) does't equal ±5 and ...
A: Draw a right triangle with sides x and y and hypotenuse r. Consider the angle that is opposite side ...
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| Cot, Csc, Sec | 1/23/2005 |
Q: I need to check something. When i click cos^-1 on my computer is that giving me the value for Sec, ...
A: cos^-1(x) does not equal sec(x) that's [cos(x)]^-1 when you put in a number and hit cos^-1(x)(called ...
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| finding the coordinates of a point | 1/22/2005 |
Q: Followup To Question - BC and AD are diameters of a circle. The coordinates are A(-3, 5) B(3, ...
A: Well, I could have but I didn't need to do so in this case since it was so simple. You can see that ...
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| trignometric functions | 1/22/2005 |
Q: find the exact value of each expression or state that the value is undefined. 1) a. cos 120º b. ...
A: Don't you have a calculator, or a table of trig functions? 1) a) cos 120 = -cos 60 = -0.5 b) sec 120 ...
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| algebra | 1/19/2005 |
Q: find an equation of the line satisfying the given conditions, giving it in slope-intercept form if ...
A: the standard equation for a line is y = mx+b where m is the slope. 1. for x+3y=5, m = -1/3 4 = ...
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| Graphs | 1/6/2005 |
Q: Solve 1. y = 2x and y= -x +3 2. y= 10 + 0.1x and y = 5 + 0.2x
A: These are all straight lines. If you want to solve them using graphs, it only takes two points to ...
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| Hyperbolic functions | 1/3/2005 |
Q: Can hyperbolic functions be defined on the basis of geometry, like trigonometric functions are ...
A: If you go to a dictionary, you can find the following: hyperbolic function - any of a set of six ...
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| geometry | 12/19/2004 |
Q: Quadrilateral JAME has vertices J(2,-2),A(8,-1),M(9,3), and E(3,2). Prove that quadrilateral Jame is ...
A: There's more than one way to get the area but a simple method is as follows: Draw the rectangle ...
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| echelon methods? | 12/8/2004 |
Q: I am trying to solve this problem from the book and I just am having trouble compairing it to thier ...
A: I've never heard of row echelon but you can certainly use determinants to solve the equations. ...
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| Story problem with system of inequalities | 12/6/2004 |
Q: A furniture company can obtain at most 8000 board feet of oak lumber for making round and ...
A: They can make 160 round tables but could only store 154 of them. They can make 100 rectangular ...
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| proportional reasoning and probability | 11/29/2004 |
Q: 1).The actual distance from Fargo, ND to Minneapolis, MN is 240 miles. If the scale in a map is 1 ...
A: I'll set them up and you can do the arithmetic 1) 1/20 = x/240, solve for x 2) 298000000(0.067) = ...
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| Algebra 1 | 11/9/2004 |
Q: Questions : Graph the equation if neccessary, write the equation in slope-intercept form first. 1) ...
A: Slope-intercept form is y=mx+b all are already in slope-intercept form except for 11) y = 3x+8 and ...
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| algebra 2 word problem | 10/28/2004 |
Q: A man goes to the bank to cash a check. The teller "interchanges" the amounts...that is, he gives ...
A: I worked this problem when I was in high school 50 some years ago. However, it's not possible to ...
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| Proportions | 10/23/2004 |
Q: I need your help with 4 problems that im having trouble understanding you have to solve and simplify ...
A: 1. 4/x = 5/7 just cross multiply to get 28 = 5x so x = 28/5 2. 3a/7 = -2/5 3a = -14/5 so a = -14/15 ...
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| Average speed....algebra | 10/20/2004 |
Q: junior drove his rig on Interstate 10 from San Antonio to El Paso. At the halfway point he noticed ...
A: You might be tempted to say 40 mph but that would be incorrect. ...
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| synthetic division | 10/20/2004 |
Q: synthetic division-can you show me step by step? 3x^3-2^2+2x-5 ------------- x-2 Express in ...
A: I presume you mean 3x^3 -2x^2 +2x -5. if you divide by x-2, the first term in the answer is 3x^2. ...
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| Quadratic equations with perfect squares | 10/16/2004 |
Q: I need your help on some problems that im not understanding. You have to solve the quadratic ...
A: It's squared, not sqaured. 1. x^2 = 225 so x = +/- 15 2. x^2 = -225 so x = +/- 15i 3. a^2 -64 = 0 so ...
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| Grapghs of quadratic equations the discriminant | 10/16/2004 |
Q: I need your help with a couple problems Im not understanding, this is what you have to do. Without ...
A: 1. y = x^2 -5x +6 dy/dx = 2x -5 = 0 so x = 5/2 at the minimum or maximum. Put that value into the ...
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| Completing the square | 10/16/2004 |
Q: Im having trouble finding the answer and how to write these problems out, I understand them a little ...
A: 1. x^2 +12x +36 2. x^2 -6x +9 1. x^2 -6x +9 = 16+9 so (x-3)^2 = 25 and x = +/-5 +3 or x = 8 and -2 ...
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| RATIONAL SQUARE ROOTS | 10/11/2004 |
Q: THE OBJECTIVE HERE IS TO FIND THE SQUARE ROOTS OF THE NUMBERS WITH RATIONAL SQUARE ROOTS. I AM NOT ...
A: When you take square roots you get two numbers, one negative and one positive. You can indicate a ...
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| solving inequalities | 10/11/2004 |
Q: The objection here is to tranform inequalities in order to solve them and im not understanding it ...
A: You can add or subtract the same thing from both sides of an inequality without changing the result. ...
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| writing equations | 10/7/2004 |
Q: What is the line of these equations: 1)slope of 3 and y-intercept of -4 2)slope of 1/2 and ...
A: The standard equation for a line is y=mx+b where m is the slope and b is the y-intercept. 1) y = ...
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| Additon or subtraction method | 9/28/2004 |
Q: I need your help, hopefeully you'll know these problems cause I've been having problems with these ...
A: 1. Just add the equations together and you have 4x=40, so x = 10 and y = -2 2. Subtract the 2nd eq. ...
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| quadratic models | 9/10/2004 |
Q: i have a problem that i didnt understand. it says to use this info in order (labeled as a *)to solve ...
A: Think about it this way. You throw the rock up with a certain velocity. Gravity is pulling it ...
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| I need help with the ACT sample assessment questions | 9/7/2004 |
Q: I'm helping my son prepare for the ACT examination for college, and I am having difficulty solving ...
A: 1. First of all, you can write it (x-2)^2 +(y+4)^2 = 9 The radius of the circle = 9^1/2 = 3 so the ...
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| physics | 9/2/2004 |
Q: 1. A was travelling in a Lancer with a speed 72 km/hr. B was travelling in another car in the same ...
A: First of all, the abbreviation for meter is m. 72km/hr = 20m/s 90km/hr = 25m/s I assume that the ...
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| algebra 3-4 | 9/1/2004 |
Q: 1. 3y-7=8 2. 6x+2=-10 3. -4+6=34 4. 15=2m-9 5. 29=-8t-3 6. 7-5u=-43 7. 14+4x=38 8. -30=-9x-3 9. ...
A: I'll do a few for you and then you can do the rest. You can add or subtract the same thing from ...
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| Physics | 8/23/2004 |
Q: In which body would the absorption of 80 kcal of heat produce the greatest increase in temperature ...
A: 1) would only cause the ice to melt but no temperature change 2) will increase the temperature to 80 ...
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| simplifying fractional expressions | 8/21/2004 |
Q: Could u please explain to me how to do problems like the following: (2x^2-3x+1)(4)(3x+2)^3(3) + ...
A: You just have to learn to keep track of them. For example, (3x+2)^3 = 27x^3 +54x^2 +36x +8 Then ...
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| algebra | 8/19/2004 |
Q: i've never needed help with math before but today, the first day of school, we got a test and i ...
A: I'm not good with domains, ranges, and relations since they didn't use those terms when I took ...
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| complete the square | 8/5/2004 |
Q: Richard. Can you help me with this "complete the square" problem? x^2-3x-7=0
A: re-write it as x^2 -3x = 7 It has to be of the form (x-a)^2 which equals x^2 -2a +a^2 so -2a = -3x ...
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| math | 7/20/2004 |
Q: Name the quadrant in which angle A must lie if secA>0 and cscA<0. My book explains the answer and ...
A: In the first quadrant, sine, cosine and tangent are all positive. In the second quadrant, sine is ...
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| math | 7/16/2004 |
Q: Using the equation, P(t)=954525.6668721*1.0212854293573^t, which represents the populaton of New ...
A: The rest of the question is how fast is the population increasing "per year". If t=1, the ...
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| thank you for the help im slowly learning. | 7/15/2004 |
Q: 1.x-6/x+2 divided by x+8/x+5 2.7/6x^2r+10/3xr^2 3.2a+6/a^2+6a+9 + 1/a+3 4.8/2a-2b - 3b/a^2-b^2 ...
A: You need to use parentheses to make things clearer 1. (x-6)/(x+2) * (x+5)/(x+8) = ...
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| hey its me again, im still kinda lost but your answers are helping. thank you | 7/14/2004 |
Q: 1.a rectangle is 6 cent. wide and 9 cent. long. if the length and width are increased by the same ...
A: 1. (6+x)(9+x) = 154 x^2 +15x -100 = 0 = (x+20)(x-5) so x = 5 2. 0 = 72t -16t^2 so t = 4.5s 3. ...
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| word problems | 7/14/2004 |
Q: Richard, I am having trouble with percentage word problems.Here are my questions: 1.How much of a ...
A: 1. You don't have enough information given. Let's assume you want to make 10 gallons of the new ...
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| im catching on (kinda) im trying to help my daughter but im not good at algebra at all. | 7/13/2004 |
Q: 36x^3-84x^2+49x 36m^2-64 5x^3+45 5(x-8)(3x-10)=0 2n^2-50=0 9n^2=12n-4 24x^2+26x=5 1/3w^2=4/5w ...
A: 36x^3-84x^2+49x = x(6x-7)^2 36m^2-64 = (6m-8)(6m+8) 5x^3+45 = 5(x+3)(x^2-3x+1) 5(x-8)(3x-10) = ...
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| math | 7/11/2004 |
Q: Can you teach me how to do problems like this. Can you explain all the necessary steps to take? ...
A: Come on now, you must be learning something. When you have 2^x = 2.5 and you take the logs of both ...
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| Alg. 2 | 6/29/2004 |
Q: Can you show me how to do some of these problems? If not, can you just tell me the answers and I'll ...
A: 1. (x^2-9)^1/2 = x-1 square both sides to get x^2-9 = x^2-2x+1 so x = 5 2. write it as f(a) = a^3 ...
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| Algebra | 6/20/2004 |
Q: Find the equation of a line passing through the point: (4,7) and (5,12) (4,7) and (15,12) (-9,2) ...
A: You can do these. The standard equation for a line is y = mx+b where m is the slope and b is the ...
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| algebra | 6/16/2004 |
Q: find the x and y intercepts then graph. this one is giving me problems. -2x+y=-3 and 5y+2x+7=0 ...
A: To find the x-intercept, set y=0 and solve for x To find the y-intercept, set x=0 and solve for y ...
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| negitive real roots of polynomial | 6/5/2004 |
Q: Now I am now stuck on the negative real roots of a polynomial. I was able to digest the positive ...
A: Re-write the expression as f(x) = 5x^4 -6x^3 +4x^2 -9x +10 try a value for x. If it is a solution, ...
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| sequences and series | 5/26/2004 |
Q: 1) to begin the hlaf-time performance, a high school band marches onto the football field in a ...
A: Basically, you want the sum of the numbers from 1 through 15. Look at it this way 1+15 = 16 2+14 = ...
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| algebra please reply back as soon as possible | 5/21/2004 |
Q: 1. find all points of intersection of the circle x^2 + y^2 =9 and the hyperbola x^2/4 - y^2 =1 2. ...
A: 1. x = +/- 2(2)^1/2, y = +/- 1 2. x = 29, y = 37 and x = -15.86, y = -67.67 3. a. x^2+y^2 = 30^2 ...
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| algebra, i think | 5/21/2004 |
Q: in the equation 58/100 = x/60, how do i solve for x? how do i convert a base 10 into a base 6 ,and ...
A: multiply both sides by 60 to get x = (58)(60)/100 A base 10 number, such as 532, means 5(10)^2 + ...
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| graph | 5/20/2004 |
Q: graph Y=12-sqrt6x-78 _____ Y=12-/6x-78 given x=13 find y given y=4.254 find x given x=25 find ...
A: You can write it y = 12 - (6x-78)^1/2 It's easy to find y if you know x. if x = 13, then 6x-78=0 ...
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| algebra please reply back as soon as possible | 5/19/2004 |
Q: 1.a parabola is y= x^2-8x+18 and the line y= 2x-7 interesct near the point (5,3). solve the system ...
A: 1. 2x-7 = x^2 -8x +18 so x^2 -10x +25 = 0 = (x-5)^2 so the only solution is (5,3) 2. x+y = 10 and xy ...
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| How to solve Two variable Linear Equation | 5/17/2004 |
Q: How do I solve this problem 2x-y=3 2x+y=5 I can't find any examples to use or go by. Do you have ...
A: This is about 8th grade algebra. There are two ways to solve equations like this. You can ...
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| algebra | 5/15/2004 |
Q: 3k+5=11 9x+14=8 4x+19=29 3m-20=1 2m-9=13 6n+23=8 3q=-2 c+6=-3 a divided by 3 - 1 =4 -4= 1 + a ...
A: I'll work the first two and then you work some. You can add or subtract the same thing from both ...
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| algebra please reply back as soon as possible | 5/5/2004 |
Q: expand and write in the standard form of a polynomial. 1a. (a+6)(a+7)(a+8) b. (2x^2-x+4)(3x-10) c. ...
A: 1a) why is it so hard to multiply these out? Just do the first two to get a^2+13a+42 and then ...
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| linear vs. nonlinear, I=MR^2 | 4/22/2004 |
Q: Recently in Physics class, we were working with moment of inertia I=MR^2. We did an experiment and ...
A: Obviously, if you plot I vs. R you're going to get a non-linear relationship since that's the ...
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| algebra please reply back as soon as possible | 4/22/2004 |
Q: i still don't understand, how do you factor out those problems 1.factor 6x^3-x^2-54x-56 2.factor ...
A: Let's start with No. 2 first. Any quadratic equation, if it can be factored, will have factors of ...
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| algebra please reply back as soon as possible | 4/21/2004 |
Q: 1. p(x)=2x^3+3x^2+3x+1 a. identify any rational zeros of p(x) 2. p(x)=3x^4+9x^3-24x^2-36x+48 ...
A: 1. P(x) = (2x+1)(x^2+x+1) so x = -1/2 2. p(x) = (x-1)(x+4)(x+2)(x-2) 3. p(0) = 2 p(-1) = -2 p(-1/2) ...
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| need help on problems | 4/17/2004 |
Q: I have a test I need to study for, so can you please explain to me in a step by step way how they ...
A: It would help to use parentheses since it's difficult to read some of your expressions. You can ...
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| algebra please reply back as soon as possible | 4/16/2004 |
Q: 1. solve the equation -x^4 + 3x^3 - 3x^2 + x + 10 = 5 to the nearest tenth. 2.estimate the solutions ...
A: All of these problems are solved the same way. 1. f(x) = -x^4+3x^3-3x^2+x+5 put in values for x ...
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| algebra please reply back as soon as possible | 4/14/2004 |
Q: 1.complete 9d^2 + 3ed - 6d^3 = 3d(? + ? + ?) 2.a. factor 21x^3 - 28x b. factor -62x^5y^2 + ...
A: 1. 3d(3d+e-2d^2) 2.a) 7x(x+2)(x-2) b) 62x^4y^2(-x+2y) 3. (x+y)(x-y) 4. (a-b)^2 5. (x+16)(x-16) 6. ...
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| Algebra Help | 4/14/2004 |
Q: I am having trouble with these, I just don't se it. Show that (-a/b)= -(a/b) a/(-b)= ...
A: For the first two, it makes no difference where the minus sign is. The expressions are negative For ...
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| algebra please reply back as soon as possible | 4/12/2004 |
Q: expand the expression and put the result in standard form in 1 and 2 1. (x+2)(x^2-3) 2. (6 + 5a^3)^2 ...
A: 1. Just multiply out to get x^3 +2x^2 -3x -6 2. 36 +60a^3 +25x^6 3. a. 1st birthday = 25x+50 2nd ...
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| algebra please reply back as soon as possible | 3/31/2004 |
Q: 1. use law of sines/cosines 6 is the adjacent, 13 is the opposite side, and 18 is the hypotenuse. ...
A: 1. the three sides may be 6, 13 and 18 but 18 is not the hypotenuse since this is not a right ...
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| Find all integers between... | 3/30/2004 |
Q: Find all integers between 100 and 1000 such that each digit is a different odd number and the sum of ...
A: You have quite a few possibilities to check out. For example, if two of the digits are 8, and 9, ...
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| algebra please reply back as soon as possible | 3/30/2004 |
Q: 1. how tall is the building if a person 6ft tall sights the top of the building at 49 degrees while ...
A: 1. h = 53tan(49) +6 = 67 ft. 2. x = 695cos(75) = 180 km 3. tanA = 1/12, A = 4.76 degrees 4. tanA = ...
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| algebra please reply back as soon as possible | 3/28/2004 |
Q: 1. IN triangle HJK m angle k = 81 degrees, k = 21, and j = 20 find angle J. 2. an observer in a ...
A: 1. 21/sin(81) = 20/sin(x), x = 70.2 degrees 2. I assume the coast guard station is on the same side ...
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| concerning polynomials | 3/27/2004 |
Q: i have some questions on polynomials. 1) (x + 1)(x^2 + x - 1) 2) (2x + 1)(x^2 - x - 3) write in ...
A: 1) you multiply x by each term in the second parenthese and then multiply 1 by each term. Then ...
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| Algebra 1 | 3/23/2004 |
Q: How do solve this math problem? It is one about solving linear systems by graphing. The instructions ...
A: I assume you mean x+y = 6 These are both straight lines and it only takes two points to determine a ...
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| algebra please reply back as soon as possible | 3/18/2004 |
Q: 1. part of a coaster track is straight andmakes an angle of 60 degrees with the horizontal. How far ...
A: 1. sin(60)=h/74, h = 64.1 2. length = 2(40)/cos45 = 113 feet 3. tan15 = 3/x, x = 11.3 miles 4. h = ...
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| Hi, I am learning trig. I... | 3/17/2004 |
Q: I am learning trig. I don't know how to do these two questions. Please explain it in full detail or ...
A: 1. If cosA = 1/3, then A = 70.53 degrees 2A = 141.06 degrees and cos(2A) = -0.778 4A = 282.12 ...
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| parabolas | 3/15/2004 |
Q: Can you tell me please how to graph a parabola from its equation I also need to label the vertex, ...
A: The standard equation for a parabola facing left or right is (y-k)^2 = 4a(x-h) For one facing up or ...
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| Word problem involving rational expressions & equations - I Think | 3/14/2004 |
Q: For 1990 through 1992, the number of banks in the US can be modeled by K = 1,228,230 + 36,590t^2 ...
A: First of all, you don't want to use commas in an algebraic expression. I assume you have K = ...
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| linear inequalities | 3/14/2004 |
Q: Solve the following linear inequalities express answers using interval notation 5+7x/3<2-x/2 I don't ...
A: I don't know what interval notation means either. You need to use parentheses since there are two ...
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| I really need help | 3/9/2004 |
Q: here are some problems I need to study for a test, can you please show work and give the answer on ...
A: I don't know what you mean by "solve" and graph. You can graph them by putting in a value for x and ...
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| algebra please reply back as soon as possible | 2/25/2004 |
Q: a radioactive substance decays over time. To scientists, a measure of how slowly it decays is called ...
A: let x = no. of half-lives a. y = 20(0.5)^2 = 5 kg b. y = 20(0.5)^8.5 = 0.055 kg c. 6 = 20(0.5)^x so ...
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| Algebra | 2/24/2004 |
Q: I am division problems here.. Can you detail your explanation so that I can understand how you ...
A: If you compare 2x and 6x^2 you will see that the first factor of the solution is 3x. If you ...
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| follow up to the tension question | 2/23/2004 |
Q: I agree that tension is a force. However, could you elaborate why in general, it is a vector ...
A: A vector consists of a magnitude and a direction. If you agree that a tension is a force then ...
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| solving non linear system of equations | 2/18/2004 |
Q: solve this system of equations x^2 + y^2 + z^2 = 19^2 1/x + 1/y + 1/z = 0 x - y + z = 11 been ...
A: The only way I know how to do it is trial and error. x,y, and z are all integers. So x^2, for ...
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