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

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 Algebra: Polynomials, rational expressions and equations Solvers Lessons Answers archive Quiz In Depth

 Question 48726: I have a question (y-2/y^2-1)+(2-y/1-y^2) I came up with 0 is that correct because the prob says simplify Click here to see answer by stanbon(57246)

 Question 48765: (x+2)(x-2)(x+12) expand the following expression and reduce not factor to its simplest form. Click here to see answer by tabi(3)

 Question 48780: I need help finding all numbers for which the rational expressions are undefined. (4x^2)/(3x-5) thank you for any help. Click here to see answer by venugopalramana(3286)

 Question 48845: I am undertaking an Algebra 2 class and have not experienced any math since 1983 so any help would be greatly appreciated. I am looking on page 296 sec 3.2 #86. Social science. If there are 6 x 10^9 people on the Earth and there is enough freshwater to provide each person with 8.79 x 10^5 L, how much freshwater is on the Earth? First of all I set up the problem as (6 x 10^9)(8.79 x 10^5)= 53.94x10^45 I have a feeling I am on the wrong tract. any help and advice I can get understanding problems such as this would be greatly appreciated. I really want to do well in this class but it has been almost a lifetime since I have endeavored in algebrs and to take a repeat course would not be financed :( thank you so much in advance Click here to see answer by Nate(3500)

 Question 48865: Solve 9x^2 - 12x - 5 Thank You Click here to see answer by Nate(3500)

 Question 48888: what values of x must be excluded x+8/5 Click here to see answer by checkley71(8403)

 Question 48851: I am about to be taking a compass test to enter college - I have looked at sample questions and I am terrible in math - Can you explain this to me, what I am trying to solve... ? Which of the following expressions represents the product of 3 less than twice x and 2 more than the quantity 3 times x ? Here are my choices. (a) -6x^2 + 25x + 6 (b) 6x^2 + 5x + 6 (c) 6x^2 - 5x + 6 (d) 6x^2 - 5x - 6 (e) 6x^2 - 13x - 6 I am totally lost, do not understand, if you can help I would greatly appreciate it, maybe there is a website you can refer me to where I could read and study algebra. Thanks, Have a Great Day - Krystal Click here to see answer by longjonsilver(2297)

 Question 48948: Eric bikes 12 mph with no wind. Against the wind she bikes 8 miles in the same time that it takes to bike 14miles with the wind. Find the speed of the wind. Click here to see answer by venugopalramana(3286)

 Question 48951: I am trying to factor 6x^8yz - 48x^2y^7z I got 6x^2yz(-8x^7y^7) Is this correct, or where did I go wrong? Click here to see answer by longjonsilver(2297)

 Question 49004: The length of a rectangle is eight times its width. If the length was decreased by 10 meters and the width was decreased by 2 meters, the area would be decreased by 162 square meters. Find the original dimensions. Please explain. Click here to see answer by Paul(988)

 Question 49031: Can you please help me solve this equation step by step please: .67 = (1-T)(.8) Please provide each step in the process. I have forgotten how to do this and have hit a wall. Thank you. DRS Click here to see answer by AnlytcPhil(1276)

 Question 49045: Please Explain: A rectangular lawn is 24 feet wide by 32 feet long. A sidewalk will be built along the inside edges of all four sides. The remaining lawn will have an area of 425 square feet. How wide will the walk be? Click here to see answer by venugopalramana(3286)

 Question 49049: wHAT IS FACTORING AND HOW DO I FACTOR SOMETHING LIKE THIS: X TO THE 2ND POWER MINUS XY PLUS 2X MINUS 2Y Click here to see answer by Nate(3500)
 Question 49049: wHAT IS FACTORING AND HOW DO I FACTOR SOMETHING LIKE THIS: X TO THE 2ND POWER MINUS XY PLUS 2X MINUS 2Y Click here to see answer by venugopalramana(3286)

 Question 49153: solve & graph the equations 3x-6y=12 2x-5y=-10 x= y= equation 1 x-axis intercept= equation 1 y-axis intercept= equation 2 x-axis intercept= equation 2 y-axis intercept= Click here to see answer by AnlytcPhil(1276)

 Question 49152: Solve and Graph the equations 3x-6y=-18 3x+5y=15 x= y= equation 1 x-axis intercept= equation 1 y-axis intercept= equation 2 x-axis intercept= equation 2 y-axis intercept= Click here to see answer by tutorcecilia(2152)

 Question 49150: Solve and graph the equations x/5 - y/3 = 1 x/2 + y/7 = 0 x= y= equation 1 x-axis intercept= equation 1 y-axis intercept= equation 2 x-axis intercept= equation 2 y-axis intercept= Click here to see answer by tutorcecilia(2152)

 Question 49165: Find the domain of f(x)=7+(sqrt3x+21), and express it using interval notation. a.[-7,infinity) b.[0,infinity) c.[7,infinity) d.[21,infinity) Click here to see answer by Nate(3500)

 Question 49214: We were told to factor this polynomial but I cannot figure out the Gcf. 4s + 6st - 14st Click here to see answer by AnlytcPhil(1276)

 Question 49246: How do you express the following in lowest terms 5/x-2 + x/x^2-4 Click here to see answer by Nate(3500)

 Question 49223: We are suppose to find the gcf of the product but I am unsure of where to start. Should I start by sloving the equation or just factoring each term. (6y^2-3y)(y+7) Click here to see answer by consc198(59)

 Question 49151: Solve and graph the equations 2x-4y=4 -3x+6y=9 x= y= equation 1 x-axis intercept= equation 1 y-axis intercept= equation 2 x-axis intercept= equation 2 y-axis intercept= Click here to see answer by venugopalramana(3286)

 Question 49244: how do you express the following in lowest terms (x^2-25)/(3x-9) * (x-3)/(x^2-10x+25) Click here to see answer by jake_6233(74)

 Question 49409: Solve by completing the square. x2 + 2x – 15 = 0 Click here to see answer by Earlsdon(6287)

 Question 49408: Find the constant term that should be added to make the following expression a perfect-square trinomial. x2 + 5x Click here to see answer by Earlsdon(6287)

 Question 49468: Find the constant term that should be added to make the following expression a perfect square trinomial x^2+5x Click here to see answer by checkley71(8403)