Questions on Algebra: Functions, Domain, NOT graphing answered by real tutors!

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Question 119971: What is the domian and range of f(x)=3x+2
Click here to see answer by jim_thompson5910(35256)

Question 119983: Evaluate and give the domain.
f(x)= 16-x^2 g(x)= 4-x
Find f(x)/g(x)
Click here to see answer by jim_thompson5910(35256)

Question 120018: if f(x)=2x-7 and g(x)=x^2-4x-5, find [gof](5)
Click here to see answer by stanbon(75887)

Question 120022: factor x^3+2x^2-5x-6 by using synthetic division.
Click here to see answer by stanbon(75887)

Question 120001: 2. Take a look at the table below and write out an equation for f(x).

x
-2
-1
0
1
2

f(x)
-5
-2
1
4
7

Click here to see answer by stanbon(75887)

Question 120026: if f(x)=2x to the second powerand g(x)=x to the second power - 3 find (f g)(x)
Click here to see answer by stanbon(75887)

Question 120024: find all the zeros for f(x)=x to the fourth power - 6 times x to the third power + 9 times x to the second power + 6 times x - 10 if one zero is 3-i
Click here to see answer by stanbon(75887)

Question 120029: solve, x^4-12x^2-45=0
Click here to see answer by jim_thompson5910(35256)

Question 120032: state all possibe rational zeros for f(x)=2x^3-2x^2+5x-8
Click here to see answer by jim_thompson5910(35256)

Question 119990: A concert promoter charges $65 per ticket for a concert. The promoter's cost will be $5500 plus $4.00 per ticket.

Determine the revenue function R.
Determine the cost function C.
Determine the profit function P.
Find the profit for the promoter is he sells 850 tickets.

Barbara (I can not receive zip files)
Click here to see answer by josmiceli(19441)

Question 120016: if f(x)=x-5 and g(x)=x^2+3, find f[g(-2)]
Click here to see answer by HyperBrain(694)

Question 120217: Find f(x+3) for the function f(x)=x^2-4
Click here to see answer by solver91311(24713)

Question 120300: please help me solve this equasion

Click here to see answer by stanbon(75887)

Question 120299: please help me solve this equasion

Click here to see answer by jim_thompson5910(35256)

Question 120384:
Is y=|x|+2 a function? Why or Why not?
Click here to see answer by crissy(1)

Question 120452: Find the domain:
s(y) = 3y/(y+5)
Thanks!
Click here to see answer by jim_thompson5910(35256)

Question 120655: STATE THE DOMAIN AND RANGEOF THE RELATION
{(3,2),(-5,7),(-4,3)
D=
R=
Click here to see answer by rapaljer(4671)

Question 120736: Please help me solve this problem.
Given f(x)= 2x + 4, find f(a-4). I would appreciate help with this problem. I am a little confused. Thank you for your help.
Click here to see answer by jim_thompson5910(35256)

Question 120992: I am working on a Composition of Functions question. I am thrown off because of the use of fractions within the equation (which haven't been in our practice material). The question that has me stumped follows. (This question comes from an online MAT113 course that I am taking at a local community college. The material comes from Mathematica 6 for Students.)
f(g(x)) f(x)= 1/x and g(x) = x/x-1 For the life of me, I can't compute the equation.
Thank you in advance for taking the time to help with this problem.
Sincerely,
Karen Davison
Click here to see answer by ankor@dixie-net.com(22740)

Question 121077: Is there anyone who can help me with this problem? I have worked it and I am not sure if my answer is correct. It is an Algebraic word problem.
The sum of two numbers is 32. Their difference is 6. What are the two numbers?
The answers I came up with is 16 and 26, is that correct? I would appreciate your help.
Thank you
Click here to see answer by praseenakos@yahoo.com(507)

Question 121086: i can't figure out how to come up with an answer to this domain:
1 | 2 | 3 | 4 | n
15 | 45 | 90 | 150 | ?
What is n?
or rather what is the Equation?
Click here to see answer by stanbon(75887)

Question 121079: I am in need of help with this word problem.
Angus invested $22,000, part at 3% and part at 14%. If the total interest at the end of the year is $990, how much did he invest at 3%?
The amount I got invested at 3% is $3,000. Is this answer correct?
Thank you for your help with this problem.
Click here to see answer by stanbon(75887)

Question 121145: find all the zeros for f(x)=x^3 - 19x - 30
Click here to see answer by edjones(8007)

Question 121144: find 2f(x) - f(x-1) for f(x)=3x^2 + 5
Click here to see answer by edjones(8007)

Question 121155: For the line 3x + 6y = 1. Find the slope and the y-intercept.

Click here to see answer by roshan2004(1)

Question 121143: find g(x+1) for g(x)=x^2 - 2x
Click here to see answer by Prithwis(166)

Question 121154: Let f(x)=x^3 -2. What is f(1/2)?
Click here to see answer by Prithwis(166)

Question 121244: I have done this problem over and over and am not getting the right answer can you help please? The problem is:
Freeport McMoRan projects that in 2010 world grain supply will be 1.8 trillion metric tons and the supply will be only three-fourths of world grain demand what will world grain demand be in 2010?
Thanks so much for your help
Click here to see answer by BrittanyM(80)

Question 121272: find the value for k so that the remainder for (x^3 + 2x^2 - kx + 5)divided by (x - 2) is 3.
Click here to see answer by stanbon(75887)

Question 121285: from a homework handout it reads, for each natural numbers,n, let P(n)=the number of prime numbers less than n. P(1)=0,P(2)=0,P(3)=1,P(4)=2,P(5)=2,P(6)=3. I have the domain as 1,2,3,4,5,6 and the range as 0,0,1,2,2,3 but what is P(20)? i can't get the answer.i think it is 8 but i think i'm wrong
Click here to see answer by solver91311(24713)

Question 121269: n^2/3 + 2n^1/3 - 15 = 0

solve equation over the set of complex numbers.
Click here to see answer by Nate(3500)

Question 121266: r - 5 square root of r - 36 = 0

solve equation over the set of complex numbers.
Click here to see answer by Nate(3500)

Question 121209: Let f(x)=x^3. What is f(1/2)?
Click here to see answer by jim_thompson5910(35256)

Question 121270: find the inverse of f(x)=5x + 4
Click here to see answer by jim_thompson5910(35256)

Question 121351: Can you help me understand the difference between domain and range?
Click here to see answer by Edwin McCravy(20054)

Question 121415: r-5 (times the square root of r) - 36 = 0
Click here to see answer by checkley71(8403)

Question 121417: find the inverse of f(x)= 3x-1 / 4
Click here to see answer by stanbon(75887)

Question 121447: ok i vaguely remember what the domain is ... which is x ...right? if im wrong here is the problem
what is the domain of x+3over 2x^2-13x+15?
Click here to see answer by stanbon(75887)

Question 121501: Can you help me solve the following problem. It is to Factor the polynomial completely.

I really appriciate it. I am not getting this section at all.
Click here to see answer by checkley71(8403)

Question 121495: Can you help me solve the following problem. It is to Factor the polynomial completely.

I really appriciate it. I am not getting this section at all.
Click here to see answer by MathLover1(20849)

Question 121413: what is the simplest polynomial equation that has roots 1-2i and -3?
Click here to see answer by Fombitz(32388)

Question 121412: approximate to the nearest tenth the negative real zeros of f(x)= x^3 - 2x^2 + 4
Click here to see answer by Fombitz(32388)

Question 121381: Find the domain and range of f(x)=x^2
Find the domain and range of f(x)=1/(x^2-1)^1/2
Find the domain and range of f(x)=x^2
Click here to see answer by Fombitz(32388)

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, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660