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

Tutors Answer Your Questions about Polynomials-and-rational-expressions (FREE)

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 48737: (6x^2)/(x-1)-(6x)/(x-1)
Click here to see answer by Nate(3500)

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 48787: Solve by addition.
-3x + y = 3
2x - 3y = 5
Click here to see answer by checkley71(8403)

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 48736: Simplify the result: (5/x)+(8/x-7)
Click here to see answer by checkley71(8403)

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

Question 48889: subtract write in simplest form y-2/y+3 -y/2y+6
Click here to see answer by alka001(14)

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 49010: 1. (3m+1)(2m-4)

Click here to see answer by checkley71(8403)

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 49077: (6x + 5)^2
Click here to see answer by checkley71(8403)

Question 49074: (4x - 1)^2 simplify
Click here to see answer by Nate(3500)

Question 49089: Can you please help me with this equation? 1/2(4x-8)= 2(x+3)
Click here to see answer by Earlsdon(6287)

Question 49090: May you please help me with this: y=3x+2
2y-14=-4x
Click here to see answer by AnlytcPhil(1276)

Question 49091: May you please help me with this? 4x² - 8x = 5
Click here to see answer by AnlytcPhil(1276)

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 49169: May you please help me with this? 2a-6+5a=3a+10
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 49310: Please help with this factoring question
w^3 + 5w^2 - w = 5
Thank you!
Click here to see answer by Nate(3500)

Question 49310: Please help with this factoring question
w^3 + 5w^2 - w = 5
Thank you!
Click here to see answer by atif.muhammad(135)

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 49006: 4m/m-3 + 6/3-m = m (Please help!)
Click here to see answer by Earlsdon(6287)

Question 49410: Solve by using the quadratic formula. 5x2 + 3x = 7
Click here to see answer by Earlsdon(6287)

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)

Question 49524: factor completely
4c^2-4cd+d^2-9
Click here to see answer by stanbon(57246)

Question 49573: factor completely
3(x-2)^2-3(x-2)-6
Click here to see answer by Earlsdon(6287)

Question 49575: factor completely
b^2-ab-6a^2
Click here to see answer by Earlsdon(6287)

Question 49576: multiply
-3a^2b/35a^5*14a^3b^2/-9b^4
Click here to see answer by Earlsdon(6287)

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