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

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Question 842932: Hello,
I've tried to find this answer in my textbook; however, it does not give me step-by-step instructions. I want to learn. Please help! Thank you kindly.
QUESTION:
A man’s shoe that is size x in Britain is
size d(x) in the United States, where d(x) = x + 0.5.
A man’s shoe that is size x in the United States is
size t(x) in Continental size, where t(x) = x + 34.5.
Find a function that will convert British shoe size to
Continental shoe size.

Click here to see answer by josgarithmetic(39613) About Me 

Question 842958: what is the domain, range and function of {(1,-2), (2,-6), (3,-10), (4,-14)} ?
Click here to see answer by jim_thompson5910(35256) About Me 

Question 843040: How to solve the function f(x)=2/3x-4.
Click here to see answer by Fombitz(32388) About Me 

Question 843076: Find all numbers that are not present in the domain of the function. Then give the domain in set notation.
f(z)= z/z-6

Click here to see answer by Fombitz(32388) About Me 

Question 843080: what is the domain,range and graph of F(x)= |2x-3|?
Click here to see answer by Fombitz(32388) About Me 

Question 843184: if f(x)=7 find f(14)
Click here to see answer by Alan3354(69443) About Me 

Question 843214: What is a function satisfies the condition:
A function that has a vertical asymptotes at -2 and 2

Click here to see answer by Fombitz(32388) About Me 

Question 843187: given the function f(x)= 2x, if 0 1-x, if 1<=x<=2,
0 if 2<=x<=3
find a) the domain b)f(1) c) f(2) d) f(3) e) f(0.1)

Click here to see answer by Fombitz(32388) About Me 

Question 843212: de fine a function which satisfies the condition:
A function which is discontinuous at 0 and 4, but bounded everywhere.

Click here to see answer by richard1234(7193) About Me 

Question 843560: Which equation describes a relationship such that x = 0 must be excluded from the domain?

Click here to see answer by Fombitz(32388) About Me 

Question 843465: Need to know if I would add subtract multiply or divide these numbers to get the right answer it is one number
5 y equals 11
10 y equals 21
15 y equals 31
20 y equals 41
Also same for the next question
14 y equals 2
10 y equals -2
6 y equals -6
2 y equals -10
This is for my daugther If you could please send the answer and explain to me how u got that answer so it will help me moving forward with her homework when she has questions Thank you in advance

Click here to see answer by richwmiller(17219) About Me 

Question 843605: For these functions together, find a value of "a" (if a value exists) which makes the function continuous.
f(x)= {(x^2-4), x is less than 0
{(x^3+a), x is greater than or equal to 0

Click here to see answer by Fombitz(32388) About Me 

Question 843633: H(x)=7-2x squared-×cubed

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Question 843645: Find the zeroes of the function f(x) = x^2 + 7x + 10
Click here to see answer by richwmiller(17219) About Me 

Question 843714: Please help me find the domain of:+F%28x%29=+X%5E2-14x%2B45+
Click here to see answer by richard1234(7193) About Me 

Question 843835: Let the function f be defined by the equation
y = f(x),
where x and
f(x)
are real numbers. Find the domain of the function. (Enter your answer using interval notation.)
f(x) = x^2-49
The x^2-49 is supossed to be in a square root but my computer will not let me type the square root

Click here to see answer by richard1234(7193) About Me 

Question 843861: domain of radical 2x
Click here to see answer by lwsshak3(11628) About Me 

Question 843958: f%28x%29+=+%283x-8%29%2F%28x%5E2-7%29 what are vertical asymptotes? I think there should be 2, one at x+=+sqrt+%287%29 and x+=+-sqrt+%287%29 but it doesn't appear that way on my calculator.
Thank you.

Click here to see answer by Fombitz(32388) About Me 

Question 844017: 1)Select the approximate values of x that are solutions to f(x) = 0, where
f(x) = -9x2 + 4x + 7

2)Select the approximate values of x that are solutions to f(x) = 0, where
f(x) = -2x2 + 3x + 9


Click here to see answer by stanbon(75887) About Me 

Question 844044: Define a function which satis fies the condition:
A function with infinitely many vertical asymptotes.

Click here to see answer by richard1234(7193) About Me 

Question 843719: For these functions together, find a value of "a" (if a value exists) which makes the function continuous.
f(x)= {In(x+a), x is greater than or equal to 0
{Sqrt of -x , x is less than 0

Click here to see answer by Fombitz(32388) About Me 

Question 844356: Given the parent functions f(x) = log3 (5x − 5) and g(x) = log3 (x − 1), what is f(x) − g(x)?
A) f(x) − g(x) = log3 (4x − 4)
B) f(x) − g(x) = log3 (4x − 6)
C)f(x) − g(x) = log3 5
D)f(x) − g(x) = = log3 one fifth

Click here to see answer by ewatrrr(24785) About Me 

Question 844509: Got an answer that is too complicated to be correct for this:
Find the difference quotient of f, that is, find [f (x + h) - f (x)]/h, where
h does not = 0 for the given function. Be sure to simplify.
f(x) = 1/(x + 3)

Can anyone help?

Click here to see answer by Fombitz(32388) About Me 

Question 844674: What is the domain of the function f(x) = 2x/(x2 - 9)? Give your answer in interval notation, using INF for infinity.
Click here to see answer by josgarithmetic(39613) About Me 

Question 844698: deanne found a dvd player on sale for $84 the regular price was $126 what was the discount rate of the dvd player that she found

Click here to see answer by ewatrrr(24785) About Me 

Question 844838: Find two points on the line y=4 that are 5 units away from the point (2,3).
Click here to see answer by josmiceli(19441) About Me 

Question 844800: f(x)= square root of x-3
Click here to see answer by jim_thompson5910(35256) About Me 

Question 844914: find the inverse of f(x)=9x/√(x^2+1)
Click here to see answer by josgarithmetic(39613) About Me 

Question 845052: For f(x)=x^2+11 and g(x)=2x-1, find the domain of(f/g)(x) in interval notation
My work:
X^2+11/2x-1
My answer for the domain of (f/g): (-infinity,1)u(1,infinity)
Is My answer corrected

Click here to see answer by ewatrrr(24785) About Me 
Question 845052: For f(x)=x^2+11 and g(x)=2x-1, find the domain of(f/g)(x) in interval notation
My work:
X^2+11/2x-1
My answer for the domain of (f/g): (-infinity,1)u(1,infinity)
Is My answer corrected

Click here to see answer by josgarithmetic(39613) About Me 

Question 845071: Use your graphing calculator to approximate the point at which the function f(x) = 5x^4 - x + 3 has a local minimum value. Give both coordinates rounded to two decimal places.
Click here to see answer by richard1234(7193) About Me 

Question 845167: Solve each radical equation, check for extraneous solutions:
x + 1 = sqrt(7x +15)

Click here to see answer by ewatrrr(24785) About Me 
Question 845167: Solve each radical equation, check for extraneous solutions:
x + 1 = sqrt(7x +15)

Click here to see answer by pmesler(52) About Me 

Question 845438: given: f(x)=2^x and g(x)=2/x
how to sketch the graphs of f and g on the same sytem of axes with clearly indicated points on each graph

Click here to see answer by Fombitz(32388) About Me 

Question 845534: {(0,2),(1,1)(2,2),(4,3)}is this a function or no
Click here to see answer by Fombitz(32388) About Me 

Question 845745: A function f(x) is defined as f(x) = -8x^2. What is f(-3)
Click here to see answer by richard1234(7193) About Me 

Question 845897: Suppose that the functions p and q are defined as follows:
p(x)=-2x+1
q(x)=-x^2
Find the following
p o q(-5) and I have=10x^3
q o p(-5) and I have =2x^3-5
Is this right?
If not can you show me step by step how to solve these

Click here to see answer by fcabanski(1391) About Me 

Question 845895: Hello i am looking at a composition of functions problem i can't seem to figure out the professor gave us the answer which was 8x^4+24x^3+24x^2+9x..
However i can't seem to get that and i can't figure out why, im looking for g of g and g(x)=2x^2+3x. Thanks for the help!

Click here to see answer by Fombitz(32388) About Me 

Question 846030: For the given functions f an g find the following and state the domain of each result
f(x)=(4x+1)/(5x-9);g(x)=(2x)/(5x-9)

Click here to see answer by psbhowmick(878) About Me 

Question 846045: f(x)= (2x -1) / (x-3)
Find the inverse function.
I get to y(x-3)=2x-1 and from there the algebra confuses me. I can't get one variable isolated.

Click here to see answer by stanbon(75887) About Me 

Question 846068: Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point.
f(x) = -3x2 + 6x

Click here to see answer by Fombitz(32388) About Me 

Question 846194: Find the domain of f(x)=2(x+5)
Click here to see answer by jim_thompson5910(35256) About Me 

Question 846412: What is the domain in interval notation of the rational function: f(x) = 8x^2+2x-3/x^2-4x ?
The example in my book shows me this example: 2x+3/2x^2-7x-4
2x^2-7x-4 =0
(2x +1)(x-4)=0
2x+1=0 or x-4=0
X=-1/2 or 4
I don't understand where the 7 went in this example, or what I would do with my question.

Click here to see answer by josgarithmetic(39613) About Me 

Question 846455: perform the indicated operation : let f(x)=-3x^2-9x+8 and g(x)=4x+9
Click here to see answer by Fombitz(32388) About Me 

Question 846458: if f(x)=-2x^2+4x-6 and g(x)=-x^4-4x^2-2x-6 find f(-4)+ g(-1)
Click here to see answer by Fombitz(32388) About Me 

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