# Questions on Algebra: Rational Functions, analyzing and graphing answered by real tutors!

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 Algebra: Rational Functions, analyzing and graphing Solvers Lessons Answers archive Quiz In Depth

 Question 133538: Let f(x)=x+1 and g(x)=6 /x+1 Find (f*g)(1) Here is what I have, but it seems to be incorrect. Can you please let me know where I've gone wrong? f=1+1 and g=6/1+1 f=2 and g=6/2 f=2 and g=3 (2*3)=6 This is how I completed this one, but when I took my test, six was not the correct answer. Unfortunately, the correct answer is not given. I am curious to see what I did wrong. Click here to see answer by vleith(2825)

 Question 133759: Hi the section im working on is solving rational equations. Heres the problem i need help on: 1 + 2/x = 3/x^2 Thank you! Click here to see answer by SoOoDumb(14)
 Question 133759: Hi the section im working on is solving rational equations. Heres the problem i need help on: 1 + 2/x = 3/x^2 Thank you! Click here to see answer by Earlsdon(6287)

 Question 133758: Hi im working on the chapter Rational Functions. The section is solving rational equations. Could you help me out with this problem? I dont understand how to do it. Here it is: 5x/x^2-25=2/x-5 thanks Click here to see answer by solver91311(16877)

 Question 133892: Functions and Graphs Give the domain and range of the revalation. y=(x+4)^2-7 Click here to see answer by edjones(7569)

 Question 134032: Identify the system of equations which has no solution. a. -x=3y+1 x=3y-1 b. x-2y=-6 2x=4y-12 c. x=2y-1 2x=4y Click here to see answer by vleith(2825)

 Question 134092: Perform the requested operation or operations. 14) f(x) = x + 10, g(x) = 8x - 14 Find (f ∘ g)(x). Click here to see answer by Madgamer107(9)

 Question 134095: Find the indicated composite for the pair of functions. 18) (g ∘ f)(x): f(x) = x - 3 6 , g(x) = 6x + 3 Click here to see answer by Madgamer107(9)

 Question 134091: If the following defines a one-to-one function, find its inverse. If not, write "Not one-to-one." 12) {(-2, 4), (-1, 4), (0, 1), (1, -5)} Click here to see answer by oscargut(891)

 Question 134223: Hi, Can you help me with this math problem? If f is one-to-one find and equation for its universe. f(x)=x^3-5 Click here to see answer by nycsharkman(136)

 Question 133919: Hello the section im working on is on solving rational equations. I dont understand this one im working on. Here it is x/x-1 + x = 4x-3/x-1 Thanks for the help Click here to see answer by algebrapro18(206)

 Question 134358: Hi can you help me with this math problem? Find the indicated composite for the pair of functions. x-3 (gof)(x):f(x)= 6 , g(x)=6x+3 I DIDNT KNOW HOW TO DRAW THE LINE FOR X-3 OVER SIX THATS WHY IT LOOKS LIKE THAT BUT ITS SUPPOSED TO BE X-3 OVER 6. THE ANSWER SHOULD BE X Click here to see answer by jim_thompson5910(28593)

 Question 134359: Please help me with this problem. Thank You! Graph the function. f(x)= 4x+2, if x<-2 x , if -2(less than or equal to sign) x (less than or equal to sign) 3 3x-1, if x>3 everything after the equals sign are in one bracket ({) Please help me-I keep getting this wrong on my assignments and tests. Thank You! Click here to see answer by jim_thompson5910(28593)

 Question 134360: Hi can you help me with this math problem? Find the indicated composite for the pair of functions. x-3 (gof)(x): f(x)= 6 , g(x)=6x+3 I DIDNT KNOW HOW TO DRAW THE LINE FOR X-3 OVER SIX THATS WHY IT LOOKS LIKE THAT BUT ITS SUPPOSED TO BE X-3 OVER SIX. THE ANSWER IS SUPPOSED TO BE X Click here to see answer by jim_thompson5910(28593)

 Question 134398: This problem is not from a textbook. Solve the system. X2+y2=145 X+y=17 The answer choices are (9,8) (8,9) (-9,-8) (-8,-9) (-9,8) (-8,9) (9,-8) (8,-9) Click here to see answer by jim_thompson5910(28593)

 Question 134472: A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were 3.087 3.131 3.241 3.241 3.270 3.353 3.400 3.411 3.437 3.477 (a) Construct a 90 percent confidence interval for the true mean weight. (b) What sample size would be necessary to estimate the true weight with an error of ± 0.03 grams with 90 percent confidence? (c) Discuss the factors which might cause variation in the weight of Tootsie Rolls during manufacture. Click here to see answer by stanbon(57307)

 Question 134489: I've been presented with this question: Solve the inequality [1/(x + 1)] > [1/(x – 1)]. State the solution set using interval notation. I started off by subtracting -[1/(x-1)] from each side to get [1/(x + 1)] - [1/(x – 1)] > 0 Then I got the common denominator of [1(x-1)/(x + 1)(x-1)] - [1(x+1)/(x+1)(x – 1)] This results in [0/(x + 1)(x – 1)] which is 0. What am I doing wrong? Click here to see answer by edjones(7569)

 Question 134556: the additve inverse of a number divided by twelve is the same as one less than three times its reciprocal. Click here to see answer by solver91311(16877)
 Question 134556: the additve inverse of a number divided by twelve is the same as one less than three times its reciprocal. Click here to see answer by ankor@dixie-net.com(15649)

 Question 134573: This problem is not from a textbook. Solve the system. X2+y2=145 X+y=17 The answer choices are (9,8) (8,9) (-9,-8) (-8,-9) (-9,8) (-8,9) (9,-8) (8,-9) Click here to see answer by stanbon(57307)

 Question 134755: The instructions say to graph each polynomial function. Factor first if the expression is not in factored form. f(x)=x^2(x-5)(x+3)(x-1) I'm not sure what to do with the x^2 Thanks Click here to see answer by vleith(2825)
 Question 134755: The instructions say to graph each polynomial function. Factor first if the expression is not in factored form. f(x)=x^2(x-5)(x+3)(x-1) I'm not sure what to do with the x^2 Thanks Click here to see answer by stanbon(57307)

 Question 134815: How do you find the square root of 63 with five on the outside? Click here to see answer by stanbon(57307)

 Question 134844: Identify all asymptotes and holes in the graph of the following rational function: f(x) = ((2x^3+6x^2)/(x^2-x-12)) Click here to see answer by vleith(2825)

 Question 134809: how do i shrink, stretch,and reflet a rational graph??? Click here to see answer by nycsharkman(136)

 Question 134881: Solve the equation by finding all real roots. x^3-7x+15x-9=0 i have this 1 -7 15 -9 /(divided by) 1. x^2-6x+9 (x+1) (x^2-6x+9) it says factor again and where is the soultion Click here to see answer by stanbon(57307)

 Question 134870: Iodine-131 is a radioactive material used to treat a certain types of cancer. Iodine-131 has half-life of 8 days, which means that it tkes 8 days for half of an initial sample to decay. The percent of radioactive material that remains after t days can be detemined from the expression 100(1/2)^t/h, where h is the half-life in days. a.what percent of a sample of iodine-131 will remain after 20 days? b.Another form of raioactive iodine used in cancer treatment is iodine-125. Iodine-125 has a half-life of 59 days. A hospital has 20 g of iodine-125 and 20 g of Iodine-131 left over from treating patients. How much more iodine-125 than iodine-131 will remain after a period of 30 days? Click here to see answer by ankor@dixie-net.com(15649)

 Question 135069: This is not a text book question Given F(x) = 4x^2-1/x^2 -16 a) find x intercepts b) y intercepts c) Find the vertical asymptote (write as equation of a line) d) Find the horizontal asymptote (write as equation of line) e) For x>4, is there a value which F(x) cannot exceed, and/or value which F(x) cannot fall below? Explain f) Find maximum or minimum in interval and state whether it is a maximum or minimum value for that interval g) Describe what happens on graph when x approaches infinity. I have several questions like this, but need direction on one, to help with the rest. I have the vertical asymptotes as 4 and -4 and the horizontal as 4. Click here to see answer by solver91311(16877)

 Question 135130: the square root of 8 + the square root of 32 - the square root of 50. Click here to see answer by stanbon(57307)
 Question 135130: the square root of 8 + the square root of 32 - the square root of 50. Click here to see answer by vleith(2825)