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Tutors Answer Your Questions about Rational-functions (FREE)
Question 72801This question is from textbook
: Can you please help:
My son is having trouble Solving rational equations.
Here are a few questions he needs help with:
1. 2 / (x + 2) - (1/x) = (-4) / (x(x + 2))
2. c - (c/3) + (c/5) = 26
3. (1/8) + ((5x) / (x +2)) = (5/2)
4. (k /(k + 1)) + (k/(k - 2)) = 2
5. (10/(2y +8)) - ((7y + 8)/(y^(2) - 16)) = (-8 / (2y - 8))
6. (5/(x+2)) = (-1/(x^(2) +7x+10)) + (3/(-x-5))
Thank you!This question is from textbook
Click here to see answer by rmromero(383)   |
Question 73158: This problem is from a hand out we were given in class on friday. I have spent all weekend trying to figure this one out, amd still havent gotten much of anywhere. I evaluated it like I normally do(solve for x) and got an anwser that was 26, but that isn't one of the anwsers the teacher gave us as an option. I think I am missing something.
The problem is:
Given f(x)=5x^2-3x+1, find f(-2)
The anwsers the teacher gave us as possible were:
A)-13
B)15
c)-25
D) 27
I figure I might be close with the 26, but still so far away ;( Help please!
Click here to see answer by jim_thompson5910(13794) |
Question 73148This question is from textbook
: Can you help me?
A headset can be manufactured for $.17. The development cost is $150,000. Graph the funtion that reprsents the average cost of a head set. About how many must be manufactured to result in a cost of less than than $5 per headset?
Thanks!This question is from textbook
Click here to see answer by ankor@dixie-net.com(6693)  |
Question 73483This question is from textbook Algebra and Trigonometry
: Here is a problem from Foersters Algebra and Trigonometry. The section is variation functions.
"A shark is 15 feet long and weighs 2000 pounds. a. Assuming that all white sharks have similar proportions, how should the weight of a great white shark vary with its length?"
I understand how to determine the constant n multiplying the independent variable if I am given 2 variable sets, but how do I do it if I only am given 1 variable set, such as in this problem?This question is from textbook Algebra and Trigonometry
Click here to see answer by checkley75(3666) |
Question 73483This question is from textbook Algebra and Trigonometry
: Here is a problem from Foersters Algebra and Trigonometry. The section is variation functions.
"A shark is 15 feet long and weighs 2000 pounds. a. Assuming that all white sharks have similar proportions, how should the weight of a great white shark vary with its length?"
I understand how to determine the constant n multiplying the independent variable if I am given 2 variable sets, but how do I do it if I only am given 1 variable set, such as in this problem?This question is from textbook Algebra and Trigonometry
Click here to see answer by Earlsdon(4900) |
Question 73953: i need to express this question as rational expression..it is from a hand out.
i got it started but i am not sure if i am on track..thanks
x^3+y^3+z^3-3xyz over a^3+b^3+c^3-3abc
times
a^2+b^2+c^2-ab-bc-ca over x^2+y^2+z^2-xy-yz-zx
Click here to see answer by ffc_01(9) |
Question 74017: I am studying for a final and I'm really having a difficult time with functions. I don't know why I don't understand them, but I don't. Please help with the following:
Given f(x)= 1/sqrt of x and g(x) = 1-x^2 evaluate the following:
a) g(2a+1)
b) g(f(x))
Thank you for your help.
Click here to see answer by stanbon(26297) |
Question 74169: Please help me with this equation..thanks so much.
f is a function defined by f(x)=-x/5 and g is a function defined by g(x)=7-3x
then 4g-5f=
this was on the board in class..i am not sure where to begin..thanks
Click here to see answer by uma(370) |
Question 74341: Hi I need help with adding and subtracting with unlike denominators. I have a couple questions and would very much appreciate it if you would take some time to help me with them.
1. x-3/x+3 + x+9/x-3
2. x+8/3x-1 + x+3/x+1
3. 4/x+4 - 7/5x
4. 2x+1/3x-1 - x+4/x-2
5. 4x/5x-2 - 2x/5x+1
6. 2x/x-1 - 7x/x+4
If you could do these and explain them to me I would be very grateful!. Thank you.
Click here to see answer by checkley75(3666) |
Question 74739This question is from textbook algebra and trigonometry with analytic geometry
: Please need help with the following problems.Your help is appreciated.
1.The period of pendulum is directly proportional to the square root of its lenght.If the pendulum has a lenght of 6 feet and a period of 2 seconds,to what lenght should it be shortened to achieve a 1 second period?
2.Express the following statement as a formula with the value of the constant of propotionality determined with the given conditions;w varies directly as x and inversely as the square of y.If x=15 and y=5.then w=36.
3.find the roots of the polynomial x^3-x^2+16x-16.
4.Given that (3x-a)(x-2)(x-7)=3x^3-32x^2+81x-70,determine the value of a.
This question is from textbook algebra and trigonometry with analytic geometry
Click here to see answer by jim_thompson5910(13794) |
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690
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