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

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Question 204663: Hi all, I had a similiar question to this earlier, and was hoping to get help with this one also.
For the given Matrix
A =
(1 2 3)
2 1 -1
2 0 1
a) Find det A by expanding row 1
b) Confirm answer by expanding by column 2. Then explain breifly how you know that answer is the same.
Any help with the above would be most appreciated.
Thanks, -Nick.
Click here to see answer by Edwin McCravy(20054)

Question 204714: Can you help me solve this Exponential Functions question:
1) state the domain and range of each equation
Equation 1: y = 3^ (x+4) - 1
Equation 2: y = 2^ (x -2) + 3
(everything in the brackets are exponents)
Click here to see answer by jsmallt9(3758)

Question 204728: True or false: The function "f(x) = 4x" grows four times faster than the function "g(x) = x". Explain
Click here to see answer by Alan3354(69443)

Question 204837: f(x)= -2x^3-2x find x if f(x) =-49
Click here to see answer by checkley77(12844)

Question 204837: f(x)= -2x^3-2x find x if f(x) =-49
Click here to see answer by RAY100(1637)

Question 204876: Find the domain of the function and identify and asymptotes.
y=2/4-x
Click here to see answer by edjones(8007)

Question 204971: Complete the ordered pair so that it satisfies the given equation. Match your result to the correct answer below.
2x � 5y = �12: (�1, ___)
Click here to see answer by RAY100(1637)

Question 205009: I have a homework assignment and I am not sure what to do. What is the Rational Zero Test? List and find zeros of f(x) from function f(x)=x^3+9x^2+8x-60.
Click here to see answer by Edwin McCravy(20054)

Question 205007: I need help with inverse problems. What is the inverse of the function f(x)=x+2/x-2?
Click here to see answer by Earlsdon(6294)

Question 205007: I need help with inverse problems. What is the inverse of the function f(x)=x+2/x-2?
Click here to see answer by ankor@dixie-net.com(22740)

Question 205477: What do you do when you have a function with an exponent? ex: d(x)=5x to the 2nd power.
Click here to see answer by Edwin McCravy(20054)

Question 205488: Graph the function and its inverse function: y= x+3/4. I don't understand it. Please help me.
Click here to see answer by stanbon(75887)

Question 205488: Graph the function and its inverse function: y= x+3/4. I don't understand it. Please help me.
Click here to see answer by nerdybill(7384)

Question 205560: what is a domain? i know the question says not graphing but if possiable how do you read a domain off a graph?
Click here to see answer by rfer(16322)

Question 205561: i am really lost and have no clue what a function is. i have a paper in front of me sorta explaining it but i am lost. what i really don't understand is what a function notation is. but any other tips or how tos for functions would be great and graphing.
Click here to see answer by rfer(16322)

Question 205613: √x +2 x =0
I squared both sides to get
(√x+2)^2 � x^2 = 0 then simplifying it I got,
-x^2 + x+2 = 0 setting up the quadratic equation I got
(-x +2)(x+1)=0 setting each side to zero,
-x+2 =0 and x+1=0 solving for x in each equation
-x+2-2=0-2 =
X=-2 and for the other one
X+1-1=0-1=
X=-1 so the solution set is {-2,-1) is this correct???

Click here to see answer by vleith(2983)

Question 205718: What is the difference between domain and range? Describe a real life situation that could be modeled by a function.
Click here to see answer by RAY100(1637)

Question 205820: find the domain of the function and express it in interval notation. g(x)= ln(x-1)
Click here to see answer by stanbon(75887)

Question 205905: 2M-3N= -13
5M+4N= 2
Click here to see answer by checkley77(12844)

Question 205808: I need help with this question please. Let f(x)= sqrt of x and let g(x)= 1/x-2. Find the g of f(x) [or the g(f(x)] and then state the domain. Thanks for helping in advance. Sorry this question is not from a textbook or workbook.
Click here to see answer by RAY100(1637)

Question 206065: give me the slope intercept form of (-3,-4) (5,3)
Click here to see answer by rfer(16322)

Question 206131: heidi has a brown pair and a gray pair of slacks, a brown blouse, ayellow blouse, and a white blouse, and a blue sweater and a white sweater. How many different outfits does she have if each outfit she wears consists of slacks, a blouse and a sweater?
Click here to see answer by Marth(57)

Question 206133: The section we are currently working on in class is titled "Rational Expressions and Functions." The directions for the problems are to 'Find all values of the variable for which the given rational function is undefined. Then express the domain in interval notation.' Unfortunately some of the equations are more complex. How do I go about solving such a problem as this one:

Click here to see answer by Marth(57)

Question 206052: If d(x)=5-2x and g(x)=-2xsquared+1, find g(d(6))
Click here to see answer by Marth(57)

Question 206125: Awarded 26 varsity letters in crew,15 in swimming, and 16 in soccer. If awards went to 46 students and only 2 lettered in all sports how students lettered in two of the three sports.
Click here to see answer by ankor@dixie-net.com(22740)

Question 206165: find the domain and explain f(x)=cuberoot x+4
Click here to see answer by edjones(8007)

Question 206306: Hi everyone, Im stumped on this one...
Find the vertex and intercepts of the function f(x) = x^(2) + x-2
A) Vertex:(0,2) ; Intercepts: (-2,0), (1,0), (0,-2)
B) Vertex: (- 1/2, - 9/4) ; Intercepts: (-2,0), (1, 0), (0,-2)
C) Vertex: (- 1/2, 9/4) ; Intercepts: (-2,0), (1,0), (0,-2)
D) Vertex: (-1, -18) ; Intercepts: (-2,0), (1,0), (0,2)
Thanks!!
Click here to see answer by scott8148(6628)

Question 206308: find the domain of and explain if realnumbers or real numbers except ?
g(x)=2x+1/x-7, g(x)=2^2-7x+1/x,h(x)=3x^2+5x-3
Click here to see answer by stanbon(75887)

Question 206332: fnd the domain of the following and explain
l(x)=2x+3
m(x)=3/x^2+7
Click here to see answer by stanbon(75887)

Question 206452: 1/a + 1/b = c for b how do I work this?

Click here to see answer by jim_thompson5910(35256)

Question 206457: how to find the following with one to one functions?
GIVEN:
g={(-8,-3), (-2,5), (1,0), (5,2)}
h(x)=2x+9
now what can be the following?
a. g^-1(5)=___
b. h^-1(x)=___
c. (h^-1 o h)(-8)=___

Click here to see answer by stanbon(75887)

Question 206027: for the one-to-one function f(x)= 2/x-4
Find the inverse f^-1
Find the domain and range of f
Find the domain and range of f^-1
Click here to see answer by mickclns(59)

Question 206663: The table shows men's shoe sizes in the US and Europe. Write a rule for the European size as a function of the US' size, Then use youe functiob to predict the European size of a US size 11 shoe
US size: 3.5, 4, 4.5, 5, 5.5, 6,
European:35,35.5,36,36.5,37, 37.5
Please help me with this word problem, I have been trying several solution, but none of them seem to work. Any help at all would be apprecaited
Thank you
Click here to see answer by stanbon(75887)

Question 206668: The table shows the profit P(in dollars) of a small sporting goods store as a function of time t(in months)since January. First copy and complete the table, Then graph the function represented by the first and third rows.

Months Since January,t: 1, 2, 3, 4, 5
Profits(dollars), P: 3200,2500,2800,3000,4100
Profits(thousands of dollars),P: ?, ?, ?, ? , ?

Please help me out on this problem, I have been working on it for several hours now and I still cannot figure it out, Any help would be greatly appreciated.
Thank you

Click here to see answer by stanbon(75887)

Question 206627: If f is a linear function and f(0)=10 and f(10)=14, find f(5) and f(-5).
Click here to see answer by RAY100(1637)

Question 206725: State the domain of the following and provide a brief expanation for your answer: f(x)= (x+4)^
Click here to see answer by stanbon(75887)

Question 206749: Find the indicated outputs for f(x)= 5x squared -3x
f(0)=
f(-1)=
f(2)=
Click here to see answer by stanbon(75887)

Question 206880: Hello,
I am stuck on this problem. I did do part of it, please let me know if what I did is right.
Problem: Consider the function f(x)=x^2+4x+1
Find h, the x-coordinate of the vertex of this parabola.
I got this: x=-4/2*1, x=-4/2, x=-2 (is this correct?)
Substitute the two integers immediately to the left and right of h into the function to find the corresponding y. Fill in the following table. Make sure your x-values are in increasing order in your table.
__x__|___y_
_____|_____
_____|_____
_____|_____
_h=_|______
_____|_____
_____|_____
The above table is what I am having trouble with. If you would please show me how to go about figuring this out I would appreciate it. Thank you
Click here to see answer by jim_thompson5910(35256)

Question 206879: find the horizontal and vertical asymptotes for the following functions if none type none f(x)=2x+3/x+2
g(x)=5x/x^2-1
Click here to see answer by RAY100(1637)

Question 206875: find the horizontal,and vertical of f(x)=2x+3/x+2
g(x)=5x/x^2-1
Click here to see answer by stanbon(75887)

Question 207174: could someone please help me solve these problems so i can help my daughter understandit better.Thanks for your time.

1. m^3 x n^3 (x is times symbol)
2. 2(square root symbol) + 3(square root symbol) x
3.x^2-x^3
4.(x+y)^5
---------
(x+y)^4

thanks for the help and if you can please write out the problem so that the next time i"ll know how to write it so it's easily understood.hagd Sarah
Click here to see answer by RAY100(1637)

Question 207204: how to find the inverse function of f(x)=5x+2
Click here to see answer by RAY100(1637)

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