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

Tutors Answer Your Questions about Functions (FREE)

Question 671515: y= -(x-2)^2+8
I need to find the x-intercepts.
Click here to see answer by ReadingBoosters(3246)

Question 671050: Use rational zeros thermo to list the potential zeros of the polynomial function. Do not attempt to find zeros.
f(x)=2x⁵-x�+6x�+44
Find the potential rational zeros
a- -1,1, -2,2, -4,4, -11,11, -44,44, -1/2,1/2, -11/2,11/2, -1/44,1/44
b- -1,1, -2,2, -4,4, -11,11, -44,44, -1/2,1/2, -1/44,1/44
c- -1,1, -2,2, -4,4, -11,11, -22,22, -44,44, -1/2,1/2, -1/44,1/44
d- -1,1, -2,2, -4,4, -11,11, -22,22, -44,44, -1/2,1/2, -11/2,11/2

Click here to see answer by ReadingBoosters(3246)

Question 667868: Suppose f is a function that takes a real number x and performs the following three steps in the order given: (1) square root; (2) subtract 13; (3) make the quantity the denominator of a fraction with numerator 4. Find an expression for
f(x)
and find its domain.
Click here to see answer by ReadingBoosters(3246)

Question 668788: y= sqrt(x+4)/x^2-2x-3 solve for x
Click here to see answer by ReadingBoosters(3246)

Question 673214: how do i state the domain of: g(x)=x^2-1/x^2+1 and then: l(x)=|5-4x|?
Does y=4/2x+3 define y as a function of x? I believe it does because there is an x in the equation. However i dont kow how to show my work for that.
Finally how do i write a cost function for this equation: a car rental charges $65, per day plus .45 cents per miles?
Click here to see answer by stanbon(75887)

Question 673251: Verify that the function f -1 (x)= x-1/2 is the inverse of f(x)= 2x+1 by showing that f (f-1(x))=f-1(f(x))=x.
Click here to see answer by stanbon(75887)

Question 673254: Find the domain of the composite function fog. f(x)=x�+8;g(x)=√x-1
f(x)=x�+8;g(x0=√x-1
f(g(x))=f(√x-1�+8
=√x-1�+8
The domain is all real numbers
This is what I came up with, not sure if I am right or way off! Thanks for the help!
Click here to see answer by ewatrrr(24785)

Question 673228: h(x)=x+10/x^2-100
Click here to see answer by ewatrrr(24785)

Question 673255: Solve the following exponential equation exact answers only ∏1ˉˣ= e⁵ˣ
No idea how to make the sign on the first it looks like a funny N...hope you can understand.
Click here to see answer by solver91311(24713)

Question 673311: I am very confused about this question:
Let h(x) = 2x + 7. Find the value of h(x) + 14.

I have done many other questions like this but they have been with only one value. Could you please show the steps to this problem?
Thanks in advance! :)
Click here to see answer by jim_thompson5910(35256)

Question 673312: Need help with the following function:
(fof)(x) when f(x)= x/x+1. I know the answer is x/2x+1 but cant figure out how to get there. Thanks!!
Click here to see answer by ewatrrr(24785)

Question 673323: Suppose y varies directly with x, and y = 14 when x = �4. What is the value of y when x = �6
Thank you so very much!!!
Click here to see answer by MathTherapy(10552)

Question 673460: you eat poop
Click here to see answer by Alan3354(69443)

Question 673504: How do you find the average rate of change between x=3 and x=5 if f(x)=x^2+5x+15
Click here to see answer by Alan3354(69443)

Question 673519: Hey, I need help solving the following problem- Factor each polynomial completely using the given factor and long division:
x^3+2x^2-21x+18; x-3
Click here to see answer by ReadingBoosters(3246)

Question 673326: how do i find the inverse of f(x)=-9x+1/-4x+ 6 ?
Click here to see answer by ReadingBoosters(3246)

Question 673315: Let g(x)=x^2+2x6. Find the value of 2[g(2)]
Where do I incert the first value?? and how do i solve this?
Thanks
Click here to see answer by ReadingBoosters(3246)

Question 673192: find the domain of f(x) = sqrt(16-x^2)
Click here to see answer by ReadingBoosters(3246)

Question 670365: Find the zero of the function f(x) = 16x - 4
Click here to see answer by ReadingBoosters(3246)

Question 673910: Is y=-8 a function?
I wasn't really taught how to tell if that's a function or not.
Thanks!
Click here to see answer by Shana-D77(132)

Question 674020: what is 3x+7=8/2

Click here to see answer by Alan3354(69443)

Question 674089: Given f(x)=x2-5x+2 and g(x)=x2+9, find the following:
f �g(x)
g� f(x)
g� f(3)

Click here to see answer by stanbon(75887)

Question 674117: Hey you guys! So I was absent yesterday and missed the notes. As I tried the homework, I realized I missed a lot. Can you help me solve for the domain please?????
The textbook says:
Find the domain of the function
f(x)= 5x^2+2x-1
Click here to see answer by jim_thompson5910(35256)

Question 674239: im having trouble finding the domain for f(x)=1/x^2-4x-5 and plugging in 1, -2, -x, 2y and 2-h into f(x) = 2 IxI+ 3x
Click here to see answer by ewatrrr(24785)

Question 674515: Use the Factor Theorem to determine whether x-3 is a factor of p(x)=x^4-2x^3+4x-5. Specifically, evaluate at the proper value, and then determine whether x-3 is a factor.
P(__) =_____________
Click here to see answer by solver91311(24713)

Question 674899: simplify -2(t+7)-4t
Click here to see answer by MathLover1(20850)

Question 674932: If f(x) = 3x^2+8x-7 find f (2)
Click here to see answer by ReadingBoosters(3246)

Question 674824: For each function, find three ordered pairs that lie on the graph of the function y=3x-1
Click here to see answer by ReadingBoosters(3246)

Question 673900: 3(x-5)=30-2x
Click here to see answer by ReadingBoosters(3246)

Question 674012: x+x+x-4-3-2=12
Click here to see answer by ReadingBoosters(3246)

Question 673696: f(x)=x^2-6x+5
Click here to see answer by ReadingBoosters(3246)

Question 675124: f(x)= x^3-5^3/x-5
what is the domain and range of this function?
Click here to see answer by ewatrrr(24785)

Question 675217: The ordered pairs (1, 25), (2, 36), (3, 49), (4, 64), and (5, 81) represent a function. What is a rule that represents this function?
Click here to see answer by Edwin McCravy(20056)

Question 675251: The function f(x)=2x�10 has the domain x∈[20,30).
What is the range of this function?
Click here to see answer by lynnlo(4176)

Question 675304: Solve using the substitution method.
2x-2y=7
x=y+5
2(y+5)-2y=7
2y+10-2y=7
-10 -10
2y-2y=-3
0=-3
OR if I cancel out the variables first I get 10=7
Obviously, neither of these is right, so what am I doing wrong?
Thanks,
Mandie

Click here to see answer by ReadingBoosters(3246)

Question 674595: Let g and f be two functions defined by
g(x)=(-5+x)(2+x)
f(x)=2-9x
for any real number x.
Find g/f(-3) and then find all values that are NOT in the domain of g/f. If there is more than one value, separate them with commas.
g/f(-3)= _________
Values that are NOT in the domain of g/f : ___________
Any help please... I'm stuck and this is my last question of a real important test! Thanks! :)
Click here to see answer by ReadingBoosters(3246)

Question 671055: Information is given about a polynomial(x) whose coefficients are real numbers find the remaining o of f.
Degree 4; zeros; 7i,2,-2
The remaining 0 of f are
(Use a comma to separate as needed)

Click here to see answer by ReadingBoosters(3246)

Question 675405: is x^2+y^2=64 a function?
Click here to see answer by jim_thompson5910(35256)

Question 675583: y=1/3x+2
y=-(x)-9
y=(.25)x
y=-(x-5)
Click here to see answer by ReadingBoosters(3246)

Question 675787: Evaluate: (f/g)(-1) - g(3)
for f(x) = x^2 +1
g(x) = x - 4

Click here to see answer by stanbon(75887)

Question 675840: What is the answer for: f/-3 + 5= 8 ? My son and I are saying we are both right but its impossible. The answer I came up with is -9. Is this correct? My son came up with -1.
Click here to see answer by ankor@dixie-net.com(22740)

Question 676182: Determine whether the relation is a function.
{(-2, -7), (3, -5), (6, -4), (9, -6), (10, -1)}
Click here to see answer by solver91311(24713)

Question 676310: i have the question, -5-(-3) over -2-4. i am using the formula y2-y1 over x2-x1. i got the answer 1/3. Why would this be the answer?
Click here to see answer by stanbon(75887)

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