Questions on Algebra: Polynomials, rational expressions and equations answered by real tutors!

Tutors Answer Your Questions about Polynomials-and-rational-expressions (FREE) Get help from our free tutors ===> Algebra.Com stats: 2010 tutors, 418636 problems solved View all solved problems on Polynomials-and-rational-expressions -- maybe yours has been solved already! Become a registered tutor (FREE) to answer students' questions. Click here to see problems AND answers on one page Question 127113: I can only get so far on this division question then I am stuck. (4x^2â-xâ+5)/(2xâ+1). I know the first number in the quotient is 2xâ however, how do I divide xâ+5 (remainder), by the divisor 2xâ+1. The answer is 2xâ-3/2;R=13/2. How do I find the fractions to solve this one Click here to see answer by ankor@dixie-net.com(15622)   Question 127292: Solve. t/3 - 3/t = 0 Does t = 0? I've been having alot of difficulty with the last couple of chapters in my class. Sometimes I think I get it and then I realize I don't have a clue. I appreciate the help! Click here to see answer by jim_thompson5910(28476)   Question 127293: Find the LCM. 35b^8c^2, 7b^4c^8, 15b^9c^2 Click here to see answer by checkley71(8403)   Question 127293: Find the LCM. 35b^8c^2, 7b^4c^8, 15b^9c^2 Click here to see answer by jim_thompson5910(28476)   Question 127296: Find all the numbers for which the rational expression is undefined. I got to the point that I rewrote the problem as: 7z+5 = 0 But, I'm stuck now. I know I should be able to solve for z at this point, but I keep getting the wrong answer. What could I be doing wrong? Did I set the problem up wrong to begin with? Click here to see answer by checkley71(8403)   Question 127296: Find all the numbers for which the rational expression is undefined. I got to the point that I rewrote the problem as: 7z+5 = 0 But, I'm stuck now. I know I should be able to solve for z at this point, but I keep getting the wrong answer. What could I be doing wrong? Did I set the problem up wrong to begin with? Click here to see answer by jim_thompson5910(28476)   Question 127289: Multiply & simplify. 4x^8/3q^4 multiplied by 9q^8/16x Click here to see answer by checkley71(8403)   Question 127291: Add. 7/z-5 + 32/(z-5)^2 Click here to see answer by edjones(7569)   Question 127379: Add. Simplify, if possible. I think I'm getting thrown off by the exponents. Can you help me? t+x/tx^2 + 4t+x/t^2x This is supposed to be set up like fractions on either side of the addition sign. I hope that helps! Click here to see answer by ankor@dixie-net.com(15622)   Question 127385: x^2y^2-17xy+60 I tried to do this problem but i really can't get started but please take me through the steps if you don't mind!!!!!! But i do know 20 and 3 should be in my answer. Click here to see answer by Earlsdon(6287)   Question 127382: Solve. 3 - a-1/a+2 = a^2-1/a+2 The first number seems to throwing me off, can someone help? Click here to see answer by ankor@dixie-net.com(15622)   Question 127440: s(w + 2t) - 2w(w + 2t)=(s - 2w)(w + 2t) I got (s + 2t)(w - 2t) What did I do wrong with this problem? I would greatly appreciate any help in with this. Thanks Click here to see answer by MathLover1(6611)   Question 127491: This problem is not from my textbook it is a worksheet problem. Find the maximum and minimum point of the function and state whether it is a maximum or minimum? f9x)=x2-16x+66 The answer choices are (0,8) minimum (2,0) maximum (8,2) minimum (2,8) maximum Click here to see answer by stanbon(57203)   Question 127491: This problem is not from my textbook it is a worksheet problem. Find the maximum and minimum point of the function and state whether it is a maximum or minimum? f9x)=x2-16x+66 The answer choices are (0,8) minimum (2,0) maximum (8,2) minimum (2,8) maximum Click here to see answer by Earlsdon(6287)   Question 127381: Simplify by removing factors of 1. 4ab/a^2-b^2 - a-b/a+b I have a feeling this should be really easy, but I've been doing algebra homework most of the weekend and I think I'm just getting confused at this point. I would appreciate anyone that could help me! Click here to see answer by bucky(2189)   Question 127496: This problem is not from my textbook it is a worksheet problem. A(x)= -0.015x3+1.05x gives the alcohol level in an average person’s blood x hrs after drinking 8 oz of 100-proof whiskey. If the level exceeds 1.5 units, a person is legally drunk. Would a person be drunk after 3 hours? The answer choices are Yes No Click here to see answer by checkley71(8403)   Question 127496: This problem is not from my textbook it is a worksheet problem. A(x)= -0.015x3+1.05x gives the alcohol level in an average person’s blood x hrs after drinking 8 oz of 100-proof whiskey. If the level exceeds 1.5 units, a person is legally drunk. Would a person be drunk after 3 hours? The answer choices are Yes No Click here to see answer by bucky(2189)   Question 127497: This problem is not from my textbook it is a worksheet problem. The instantaneous growth rate of a population is the rate at which it is growing at every instant in time. The instantaneous growth rate r of a colony of bacteria t hours after the start of an experiment is given by the function r=0.01t3-0.03t2+0.08 for 0 is less than or equal to t less than or equal to 7. Find the times for which the instantaneous growth rate is zero. The answer choices are 2 sec and 4 sec 1 sec, 2 sec, and 4 sec 1 sec 1 sec and 4 sec Click here to see answer by stanbon(57203)   Question 127499: Hello, Can someone help me with this problem. I cant seem to get it. 2x + 6 ----------- 4x^2 + 12x I wasnt sure how to put the exponent in so i put it as ^2 Click here to see answer by checkley71(8403)   Question 127499: Hello, Can someone help me with this problem. I cant seem to get it. 2x + 6 ----------- 4x^2 + 12x I wasnt sure how to put the exponent in so i put it as ^2 Click here to see answer by stanbon(57203)   Question 127499: Hello, Can someone help me with this problem. I cant seem to get it. 2x + 6 ----------- 4x^2 + 12x I wasnt sure how to put the exponent in so i put it as ^2 Click here to see answer by bucky(2189)   Question 127500: Can someone help me work this problem out? 2a^2 + 3a -5 _____________ 3a - 3 Thank YOu Click here to see answer by checkley71(8403)   Question 127503: I am stuck on a multiplication problem. I hope someone can help. a^2 - 1 2a + 6 ___________ x _______ a^2 - 2a -15 a^2 - a Click here to see answer by jim_thompson5910(28476)   Question 127400: I have to simplify the polynomial and i am really confused. This problem is so different then the examples given in the text... divided by Click here to see answer by bucky(2189)   Question 127507: Factor polynomial completely 9bn3+15bn2-14bn Click here to see answer by jim_thompson5910(28476)   Question 127505: Can anyone help me out with this problem? 4x + 8 _______ I started to work the problem out and couldnt get any 5x - 15 further. I know 4x + 8 is equal to 4(x+2) and so on, _______ that is as far as I got. Thank You 12x+ 24 _______ 10x - 30 Click here to see answer by jim_thompson5910(28476)   Question 127504: Can someone explain how to divide this problem? x + 3 -2x - 6 _____________ / ________ x^2 - 6x + 5 x2- 25 I didn't know how to put in a division symbol so I put the / instead Click here to see answer by jim_thompson5910(28476)   Question 127518: Use the factor theorem to decide whether or not the second polynomial is a factor of the first. 9) 4x^2 - 33x + 65; x - 5 Click here to see answer by jim_thompson5910(28476)   Question 127529: I have to find the LCM OF Y/10X^2 AND X/15Y^3. I am getting an answer of 30x^2y^3 and another answer to the same problem of 1/150xy^2. Can you show me the steps on how to do this problem correctly.This problem is not in the book. It is a handout. Thankyou! Laurie hubbsurg206@aol.com Click here to see answer by edjones(7569)   Question 127517: Find all of the real and imaginary roots, stating the multiplicity of each. 16) (x + 1)^2(x - 1) = 0 Click here to see answer by stanbon(57203)   Question 127536: Brine is a solution of salt and water. If a tub contains 50 of a 5% solution of brine, how much water must evaporate to change it to an 8% solution? Click here to see answer by stanbon(57203)   Question 127589: a. Solve the equation for r: Click here to see answer by jim_thompson5910(28476)   Question 127592: b. Suppose that an object is 100 pounds when it is at sea level. Find the value of C that makes the equation true. (Sea level is 3,963 miles from the center of the earth.) Click here to see answer by jim_thompson5910(28476)   Question 127600: c. Use the value of C you found in the previous question to determine how much the object would weigh in i. Death Valley (282 feet below sea level) ii. The top of Mt McKinley (20,430 feet above sea level) Click here to see answer by jim_thompson5910(28476)   Question 127601: a. Solve this equation for h Click here to see answer by jim_thompson5910(28476)   Question 127606: b. Long’s Peak in the Rocky Mountain National Park, is 14,255 feet in elevation. How far can you see to the horizon from the top of Long’s Peak? Can you see Cheyenne, Wyoming (about 89 miles away)? Explain your answer. Click here to see answer by jim_thompson5910(28476)   Question 127623: This problem is not from my textbook it is a worksheet problem. Use Descartes’s rule of signs to discuss the possibilities for the roots of the equation. 4x3-9x2+2x+3=0 Click here to see answer by solver91311(16868)   Question 127625: This problem is not from my textbook it is a worksheet problem. Identify the solution set for the inequality. x2+4x<2x+8 The answer choices are (-4,2) (2,4) (-oo,-4) u (2,oo) [-4, 2] Click here to see answer by Earlsdon(6287)   Question 127646: i am dividing polynomials (x^5+1) divided by (x+1) how do i get the answer? Click here to see answer by josmiceli(9645)   Question 127691: What is the slope and y-intercept of the line? y=-2/3x-12 Click here to see answer by annasatterfield(1)   Question 127862: The problem states to simplify. (3x+3y+3)/9x ÷ (x^2+ 2xy+y^2- 1)/(x^4+ x^2 ) I know you multiply by the reciprocal, but I'm not sure how to get this simplified. Thanks! Click here to see answer by oscargut(891)   Question 127885: (x-6)(x-2) multiplying polynomials Click here to see answer by jim_thompson5910(28476)   Question 127884: 24x+2x-12 Click here to see answer by jim_thompson5910(28476)   Question 127930: (x/x+1) - (2/x-1) - 1 please explain/show this to me... i tried doing it and again, only got very partial credit . i dont understand the whole LCD thing with the negatives... Click here to see answer by edjones(7569)   Question 127932: i was doing my worksheet and this problem i got very very partial credit on, i started off with a lcd of 54... but i think i messed up my negatives somewhere ... please explain/show me... (3g-1/9) - (g-1/6) Click here to see answer by edjones(7569)

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