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

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Question 62526: Help Please
given f(x)=15x^3-4x^2+3x-8, find all possible rational zeros
thanks for your help
Click here to see answer by venugopalramana(3286)

Question 62591: One number is 3 times another. If the sum of their reciprocals is 4/21, find the two numbers.
I think I can solve the equation if I could figure out how to set it up.
Thanks
Click here to see answer by 303795(562)

Question 62599This question is from textbook
: Please help simply this rational expression. Thanks. (x^3+y^3) / (x^2-y^2)
I already did so far (x^3+y^3) / (x-y)(x+y)
But I don't know what to do after this.
Thanks again.This question is from textbook

Click here to see answer by josmiceli(3012)

Question 62505: 4. Find the the y-intercept of the line passing through (2,3) which is perpendicular to the
line through the points (6,7) and (6,18).
5. Specify the domain and range of the relation
x^2/18+(y−4)^2/4=1/2

Click here to see answer by venugopalramana(3286)

Question 62657: (x-9)^7

Click here to see answer by funmath(2873)

Question 61890: I need some help please
Find all zeros of f(x)=3x^2(x-5)(2x+9)^3(x-4) and their multtiplicatee
thank you
Click here to see answer by 303795(562)

Question 62736: what is the answer to this
4-2x/x2-12x+20
Click here to see answer by 303795(562)

Question 62732: I am supposed to evaluate the given function with the following numbers for the equation listed below.
f (0)
f (5)
f (-2)

f(x) = x2 – 7x + 10
How do i do this??? Thank you so much!
Click here to see answer by Cintchr(475)

Question 62723: determine if the function {13,0}, {10,-9}, {9,-10}, is invertible and what is its inverse. thank you
Click here to see answer by funmath(2873)

Question 62760: Help! I've been working on this problem for hours I justg dont get it.
2x+11 divided by x^2+4x-5 then 6 divided by x+5 is added to it and the entire equation equals 3 divided by x-1
I've gotten this far (x+5)(x-1) is my LCD. I multiply the numberator and the demominator by this i'm stuck when I get to 2x^2+24x=70 what do I do?
The isbn of my text is 0-13-1886846-2 but the problem is from a quiz
Click here to see answer by uma(370)

Question 62789: 27. Subtract. Express your answer in simplest form.
2 y
--- subtract ----
5 y-2

The answer is -3y-4/5(y-2) but I can't figure out how they got that answer.
Click here to see answer by checkley71(8405)

Question 62790This question is from textbook Beginning Algebra

: 28. Add
6/3x-2 +3/2x
The answer is 3(7x-2)/2x(3x-2) but I can't figure out how they got that answer.
I ended up with 3(x+2)/(3x-2)(2x).This question is from textbook Beginning Algebra

Click here to see answer by checkley71(8405)

Question 62819: please solve
18y4-42y3

4y2+25y+25

54t3+16v3

y2-3y-10=0
Click here to see answer by stanbon(26295)

Question 62825: Please help me solve this problem: what is the square root of n+9 (under square root sign) +3=n (not under the square root sign
Thank you
Click here to see answer by 303795(562)

Question 62788This question is from textbook Beginning Algebra

: I think I am in the right section. I'm doing practice problems but I don't have an answer key to know if I am going in the right direction

23. Multiply.
n^2-n-20 n^2+5n
-------- * ------
2n^2 n^2-25

I did this thus far but I know it is incorrect.

(n+4)(n-5) n(n+5)
--------- * ------
2n^2 n-5)(n-5)
This just doesn't look right. This question is from textbook Beginning Algebra

Click here to see answer by 303795(562)

Question 62876This question is from textbook Intermediate Algebra 9th

: FOR FUNMATH, sorry about the last problem but my instructer gave out the wrong question. The new problem is
6/x-2 + 7/x^2-4 = x+3/x+2
Please lean a hand, I'm getting mixed up.This question is from textbook Intermediate Algebra 9th

Click here to see answer by Earlsdon(4900)

Question 62876This question is from textbook Intermediate Algebra 9th

Click here to see answer by stanbon(26295)

Question 62876This question is from textbook Intermediate Algebra 9th

Click here to see answer by funmath(2873)

Question 62824:
Please help me solve this equation:x(3)+5x(2)-4x-20=0
(the 3 and 2 are exponents)
Thank you
Click here to see answer by checkley71(8405)

Question 62911: Can you please help me evaluate the polynomial. 4x^3 - 4x^2 - 37 for X = 2
Click here to see answer by stanbon(26295)

Question 62877: please help me with this equation---7x^4-6x^2-1=0

Click here to see answer by funmath(2873)

Question 62826: please help me solve this problem: (x+8)(x-2)<0
Thank You
Click here to see answer by praseenakos@yahoo.com(417)

Question 62844: Please help me to solve the following: divide (10m^4-9m^3+16m^2)/(2m^2)
Click here to see answer by funmath(2873)

Question 62827: Please help me solve this problem:
x+1 divided by x-1 is greater than or equal to 0
Click here to see answer by funmath(2873)

Question 62894This question is from textbook Algebra and Trigonometry
: Simplify:
1+(1/(1+(1/(1+(1/(1+(1/x)))))))
if that makes no sense, it's also written something like (ignore the periods):
1+ ________1________
.......1+ ______1______
..............1+ ____1____
......................1+ (1/x)
Thank you so much!This question is from textbook Algebra and Trigonometry

Click here to see answer by venugopalramana(3286)

Question 62791: find a polynomial with leading coefficent 1 and degree 3 that has -1,11, and 3 as roots
Click here to see answer by funmath(2873)

Question 62952: (8X 4 - 5X 3 + 7X 2 - 4X + 1) - (2X 4 - 5X 3 + 2X 2 - 4X + 3)
Perform the indicated operations. Can someone please show me how? Thanks!
Click here to see answer by 303795(562)

Question 62954: Perform the indicated operations. Please help me to subtract this problem. Thank you
7X 4 - 2X 3 - 5X 2 + 4X - 1
-
3X 4 - 2X 3 - 5X 2 + 7X - 2

Click here to see answer by 303795(562)

Question 62955: Please help me add this problem. Thank you.
6X 3 - 3X 2 + 4X - 2
-6X 3 + 7X 2 - 2X - 2

This is addition.

Click here to see answer by 303795(562)

Question 62953: (7X 3 - 2X 2 + 4X - 1) - (9X 3 - 4X 2 + X - 3) + (2X 3 - 2X 2 - 3X -2).
Please show me how to solve. Thanks!
Click here to see answer by uma(370)

Question 62957: Please show me how to solve. Thanks!
(X - 3) (2X 3 - 15X - 6)
Click here to see answer by 303795(562)

Question 62956: -4X 2 (5X 4 - 3X 2 + X - 2). Please help me solve this problem. Thank you.
Click here to see answer by 303795(562)

Question 62956: -4X 2 (5X 4 - 3X 2 + X - 2). Please help me solve this problem. Thank you.
Click here to see answer by uma(370)

Question 62842: Please help me to solve the following: Use synthetic division to find the quotient and the remainder of (z^5+3z^4-15z^3+20z^2+14z+13)/(z+6)
Click here to see answer by stanbon(26295)

Question 62981: Perform order of operation. Please show me how for this one. thanks!
(X-4) (X+7)
Click here to see answer by checkley71(8405)

Question 63081: A square has sides of length 3x - 2 centimeters (cm). Express the area of the square as a polynomial.
Click here to see answer by 303795(562)

Question 63075: Find the value of the polynomial for the given values of the variable:
-x2 - 5x - 6, where (a) x = -3 and (b) x = -2

Click here to see answer by praseenakos@yahoo.com(417)

Question 63079: A triangle has sides 3x + 7, 4x - 9, and 5x + 6. Find the polynomial that represents its perimeter.
Click here to see answer by 303795(562)

Question 63078: If there are 6 x 109 people on the Earth and there is enough freshwater to provide each person with 8.79 x 105 L, how much freshwater is on the Earth?
Click here to see answer by 303795(562)

Question 63076: The cost in dollars of manufacturing w wing nuts is given by the expression 0.07w + 13.3. Find the cost when 375 wing nuts are made. What is the average cost to manufacture one wing nut?
Click here to see answer by 303795(562)

Question 63066: 250 + 2k^3x
factor the polynomial. state prime if needed.
Click here to see answer by funmath(2873)

Question 63080: The price of an item is given by p = 2x2 - 100. Find the polynomial that represents the revenue generated from the sale of x items.
Click here to see answer by uma(370)

Question 63090This question is from textbook INTRODUCTORY ALEBRA
: 8xsquared minus 2x minus 3 divided or over 6xsquared minus 5s minus 4This question is from textbook INTRODUCTORY ALEBRA

Click here to see answer by uma(370)

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