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

Tutors Answer Your Questions about Functions (FREE)

Question 170657: How do you find the degree and zeros of x(x+4)(x-3)?
Thank you
Click here to see answer by jim_thompson5910(28715)

Question 170800: Please help!!!!!
Find the slope of the graph of the linear function f.
f(2) = -3, f(-2) =5
Click here to see answer by nerdybill(7008)

Question 170855: Given f(x) = e-2x + 1, evaluate the following. Round to the nearest ten-thousandth.
a. f(-1)
b. f(3)
c. f(-2)
Show your work here:

Click here to see answer by jim_thompson5910(28715)

Question 170977: find the value of the function
g(x)=(x^3 + 9/3x) when x= -3

Click here to see answer by checkley77(12569)

Question 171220: Find the equation (in slope-intercept form) of the line that goes through (–1, 2) and has slope 4.
No clue on this one, please help!
Click here to see answer by Mathtut(3670)

Question 171292: I need some help on how to do a certain problem:

Find the function of
x y
1 2
2 4
3 8
4 16
5 32
6 64
7 128

I tried figuring this out for an hour but
cannot get it. I was making up possible functions
but that didn't work either. Thanks in advance!

Click here to see answer by solver91311(17077)

Question 171311: I need a little help trying to figure out this proble it is on how to find specified values of functions.. So here is my question..
Find f(2) given f(x) = -2x to the third power + x two the second power +23 That is my question...
Click here to see answer by KnightOwlTutor(293)

Question 171335: I need help with this problem.. It is find f(-2) given f(x) = -2xto the second power + 5x - 2
Click here to see answer by stanbon(57967)

Question 171337: Find f(1) given f(x) = 3x to the third power - x to the second power + 23
Click here to see answer by solver91311(17077)

Question 171337: Find f(1) given f(x) = 3x to the third power - x to the second power + 23
Click here to see answer by Mathtut(3670)

Question 171336: Find f(3) given f(x) = -3x to the second power +4x +11
Click here to see answer by solver91311(17077)

Question 171755: Find the range of the function defined by F(x)=|x|
Click here to see answer by stanbon(57967)

Question 171753: Find the domain of the function as defined by F(x)= (x+2)/(x-2)
Click here to see answer by Earlsdon(6294)

Question 171788: 8x+9y=11
Click here to see answer by jim_thompson5910(28715)

Question 171789: i have no idea how to solve this. it wants me to solve (-6,8). PLEASE HELP
Click here to see answer by Mathtut(3670)

Question 171810: Give the domain of the variable in each expression:
a.
5
-----
2n + 3
b.
5n + 1
------
7
c.
5n + 1
-------
7(2n + 3)
Click here to see answer by jim_thompson5910(28715)

Question 171792: x | y how do i solve this'[
3 |5.4
7 |12.6
12|21.6
Click here to see answer by checkley77(12569)

Question 172053: State the domain and range of y=x^2+1, Justify your answer
thanks for all your help!
Click here to see answer by Difficulty(2)

Question 172052: hello, I'm having problems with this math problem, your help would be very appreciated. Here it is...
The relationship between the selling price of a sleeping bag, s dollars, and the revenue at that selling price, r(s) dollars, is represented by the function r(s)=-10s^2 + 1500s. Evaluate, interpret, and compare r(29.95), r(60.00), r(75.00), r(90.00), and r(130.00).
Do I have to go through each one and substitute into the equation like so...r(29.95) = -10(29.95)^2 + 1500(29.95), solve, and compare ?

Click here to see answer by solver91311(17077)

Question 172097: Find the largest possible domain of
2/x-2
I know the domain is all real numbers, but 2... but how do you find the largest domain?
Click here to see answer by Mathtut(3670)

Question 172180: determine the horizontal asymptotes of the function
f(x)=(3x^2+4x-12/x^2-16)
Click here to see answer by jim_thompson5910(28715)

Question 172199: What is the appropriate domain and range of this cubic function in interval notation:
Click here to see answer by jim_thompson5910(28715)

Question 172197: What is the appropriate domain and range of this cubic function in interval notation:
Click here to see answer by Edwin McCravy(8999)

Question 172253: I am working on variations and I am having problems...please help
The question is:
I varies inversely with the cube of W.
If I = 32 when W = 1/2, find I when W = 1/3.
I come up with 2304 but the book comes up with 108, not sure where I am going wrong. I am using the formula I=K/W^3.
Thanks for your help!
Click here to see answer by Mathtut(3670)

Question 172306: Please help, the question is on variations:
I varies inversely with the cube of W.
If I = 32 when W = 1/2, find I when W = 1/3.
Thanks!!
Click here to see answer by Mathtut(3670)

Question 172416: determine the vertical asymptotes of the function
f(x)=(x^2-25/x+4)
Click here to see answer by jim_thompson5910(28715)

Question 172605: determine the end behavior and maximum number of turning points for the function
f(x)=-6x^5-3x^3+10x^2-3x+2
a. down to the left, down to the right, 6 turning points
b. down to the left, up to the right, 4 turning points
c. up to the left, up to the right, 5 turning points
d. up to the left, down to the right, 4 turning points
Click here to see answer by stanbon(57967)

Question 172701: Please help explain this function of a function: when
f(x)=sqrt(x+6) and
g(x)=sqrt(x-3)
Please explain to me why: f of g(x) otherwise stated as f(g(x))= f(sqrt(x+6)) instead of f(sqrt(x-3))???
Click here to see answer by Alan3354(31529)

Question 172782: Can you step me through this process?
Given the two functions r(t) = 3t + 4 and t(s) = 2s - 5, write r as a function of s.
Click here to see answer by vleith(2825)

Question 172863: The total value of quarters and nickels in a jar = 7.70. If the nickels were quarters and the quarters were nickels, the toal value of coins would be 4.90. Find the number of nickels.
Click here to see answer by Mathtut(3670)

Question 172881: Given f(x) = 5x - 1, find f(a + 3)
Click here to see answer by monika_p(71)

Question 173001: You and your friends want to open a company to sell "Math is fun" t-shirts. Each shirt costs $5 and you sell them for $9.50. Please show all work.
a.Write a function that represents how much money would you spend if you buy x number of t-shirts.
b. Write a function that represents the total money you would make selling x number of t-shirts.
c. Using part a and b. Write a function rule for your profit.
d. Create a function table for your above function. Is the function of direct variation or indirect variation? If so, write the function in form of a direct or indirect equation.
Can you please help me because I'm having a lot of problems with this type of algebra?
Thank you very much.
Click here to see answer by Mathtut(3670)

Question 172882: You want to enclose a rectangular lot with fencing. One side of the lot runs along the highway. The fencing along the highway costs $10 per foot and the rest of the fencing costs $7 a foot. The total money available for fencing is $6,000. The cost equation for the fencing is 7(2W+L)+10L = 6000, where L is the length of the lot and W is the width of the lot. The area of the lot, A, is given by the formula A=LW.
Can you step me through the following:
1. By writing the width as a function of the length, find the width of the lot, if its length is 100 feet (Width = ).
2. Write the area of the lot as a function of the length (A(L) = ).
3. What will be the area of the lot if the length is 100 feet (Area = )?

Click here to see answer by ankor@dixie-net.com(15746)

Question 173097: Use the Factor Theorem to determine whether x - c is a factor of the following function. Write in the form f(x) = (x - c)(quotient) if f(x) = 4x 3 - 3x 2 + 9 and c = 3.
Click here to see answer by stanbon(57967)

Question 173098: List the potential ratrional zeros of the following polynomial:
f(x) = 3x 7 - x 5 - x 3 + 2

Click here to see answer by jim_thompson5910(28715)

Question 173115: g(x)= ln(x-4)
Click here to see answer by stanbon(57967)

Question 173115: g(x)= ln(x-4)
Click here to see answer by user_dude2008(1861)

Question 173143: if f(x)=2x+3 and g(x)= 2x^2-3x+4, find f(g(x)).
Click here to see answer by jim_thompson5910(28715)

Question 173319: 1) g(x)=5^x Find the domain .
2) g(x)=e^x-5 Describe the transformations:
equation(s) for the vertical asymptote(s):
x-intercept in (x,y) form:
3)g(x)=log(x-3) same for #2
4)P=11R44LN x where x is the # of years after 2002

Click here to see answer by stanbon(57967)

Question 173491: 2x-4 divided by x-2
Click here to see answer by nerdybill(7008)

Question 173238: what is the domain of T(n)=2n-1?
also, for this function, what is the coefficient of n?
what does the coefficient of n tell you about the rate of change?
Click here to see answer by solver91311(17077)

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