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

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Question 515246: what is the domain of this function: F(x)=X*e^(x^2)
I know I can type it into my calculator but i would like to know how to find the domain as well.
Click here to see answer by jim_thompson5910(35256)

Question 515247: find the maximum value of the function
f(x)= 3+4x^2-x^4
hint: let t=x^2
Click here to see answer by drcole(72)

Question 515247: find the maximum value of the function
f(x)= 3+4x^2-x^4
hint: let t=x^2
Click here to see answer by richard1234(7193)

Question 515390: 1/√(8x+12) what is the domain of this function? Thank you so much!
Click here to see answer by Gogonati(855)

Question 515422: given the function of h described by h(x)=x+9, find each of the following:
h(0)
h(-18)
h(-20)
h(18)
h(x+19)
Click here to see answer by richard1234(7193)

Question 515505: what is the domain of g(x)=2/2-7
Click here to see answer by oberobic(2304)

Question 515533: Given that f(x)=6x^2+5 and g(x)=5x-8, find an expression for h(x) so that the domain of f/g/h is {x such that x is a real number and x cant be 8/5 and x cant be 9/4
Click here to see answer by stanbon(75887)

Question 515560: If f(x)=2x^2+3 and g(x)=x-5 find:
a. (f o g)(3)
b. (g o f)(3)
I am unsure as to where the (3) goes in this problem. I do know that the (3) will replace the x in the problem. My question is "How do I put a (3) in when I start with 2x^2?" This is how I started the problem:
(f o g)(3)=(f o g)*(3)=2*(x-5)^2+3. Would you please help me solve both of these problems step by step. Your guidance will be greatly appreciated.
Respectfully,
TLM

Click here to see answer by drcole(72)

Question 515569: What is the difference quotient of f(x)=x^4
Click here to see answer by drcole(72)

Question 515735: find domain of the function
g(x)=_7__
5-7x

Click here to see answer by oberobic(2304)

Question 515761: what is the answer to (3x+4)+2 if x is -1 ???
Click here to see answer by tracyc0912(40)

Question 515869: f(x) = 10x^2 + 3 find domain and range

Click here to see answer by drumwrrv(7)

Question 516156: Given: f(x) = (4x+6)/(6x-5).then f^-1(x)=?

Click here to see answer by stanbon(75887)

Question 516313: what is the domain and how do you find it? y = x-1/x-2 (the numerator has a square root over it)
Click here to see answer by nerdybill(7384)

Question 516389: For each function, find f(-2), f(-1/2), f(3), and f(7).
1. f(x)= -1/3x + 1
Click here to see answer by Maths68(1474)

Question 516551: i need to know how to work out f(k)=7(3-k)+3k-4
And i need to find the solutions.
F ( k)= - 19
F ( k) = 37
F (k) = - 43
Click here to see answer by stanbon(75887)

Question 516595: Find the domain and the range of the relation and determine wether it is a function.
{(10,3),(-9,-4),(1,-2),(4,-10)}
The domain is {}??
(Simplify your answers. Type an interger or a fraction. Use commas to seperate answers.)

can you explain to me how i solve this?? i have many more like it...
My email is amberdegen@yahoo.com
Click here to see answer by solver91311(24713)

Question 517060:
What is the domain of f(x) = 4/(x2 + x - 6)?

Click here to see answer by htmentor(1343)

Question 517162: find the domain of the following function:
(1/x)+(2x/x^2-36)
Click here to see answer by stanbon(75887)

Question 517162: find the domain of the following function:
(1/x)+(2x/x^2-36)
Click here to see answer by solver91311(24713)

Question 517268: Determine whether the function f(x)=2x^4-x^2 is even, odd, or neither.
Click here to see answer by stanbon(75887)

Question 517276: If f(x) = -4x + 1, find the average rate of change from -2 to 1
Click here to see answer by richard1234(7193)

Question 517520: Okay, so my friend needs help and I haven't taken this class in awhile so this is kind of a refreshment.
Find the range for each equation if the domain is { -3,-1,0,2,3 }. Plug each number of the range into the equation - the answer will be the corresponding number in the domain "
This is one of the equeations
VVV
y=5x+1

Click here to see answer by scott8148(6628)

Question 517987: Find the domain of the following relation:
5x^2-10x+4=y
Click here to see answer by solver91311(24713)

Question 517988: what's the answer to 2 over 9 plus 2 over 9 times 1 over 4 in simplest form
Click here to see answer by rfer(16322)

Question 518185: Express the function h(x)=\frac{1}{x + 9} in the form f \circ g. If g(x)=x + 9, find the function f(x).
Click here to see answer by jim_thompson5910(35256)

Question 518451: find the domain and range from H(t)=2t^2+8t+14
Click here to see answer by solver91311(24713)

Question 519005: how do you solve -1=(5+x)/6
Click here to see answer by jessica43(140)

Question 519021: Please help me understand how to work this problem.
Evaluate each function at the given values of the independent variable and simplify.
f(x) = 4x + 5
a. f(6) b. f(x+1) c. f(-x)
Click here to see answer by jessica43(140)

Question 519148: If f(x) = 6x + 3and g(x) = 5x - 2, what restrictions are on the domain of (f/g)(x)?
Click here to see answer by stanbon(75887)

Question 519109: Express f(x)= -4x^2+40x-13 into f(x)=a(x-h)^2 + k and find the vertex of this quadratic function. I'm at a loss on where to begin and what to do, could someone more intelligent than I am, please give me an example to follow?
Thanks so much!!! :)
Click here to see answer by scott8148(6628)

Question 519190: Find the value of the function f(x) = (x^3 +9)/3x when x = - 3
Click here to see answer by unlockmath(1688)

Question 519189: Let f(x) = 2x - 4 and g(x) = 0.5x+2.
Find f(g(x))
Click here to see answer by bucky(2189)

Question 519218: Tell whether the following are symmetric to the Y-axis, X-axis, Origin, or neither.
y=\frac{1}{x}
x=\frac{1}{y}
y=\left|\frac{1}{x}\right|
y=\frac{2+x^4}{1+x^2}
Click here to see answer by Alan3354(69443)

Question 519363: Find the vertex: f(x)= -(x+6)^2-8
Solve: 5x^2=10
Find the vertex: f(x) = 5(x+5)^2+2
Find the vertex: f(x) = 3x^2-18x+8
Click here to see answer by stanbon(75887)

Question 519188: Find the inverse of the function: y = (3x + 9)/12
Click here to see answer by ankor@dixie-net.com(22740)

Question 519696: if f(x)= 2x
find f(x+3)
please help me. i dont understand functions at all,
Click here to see answer by jim_thompson5910(35256)

Question 519729: I don't understand how to do this:
Find the domain of:
Thanks in advance :)!
Click here to see answer by josmiceli(19441)

Question 519763: I need step by step instructions on how to graph a step function. I don't need to see the graph but to just be instructed by words. The step function is
f(x) = 2[x] (ceiling function) for the domain -2 < x < 1 (the less than signs are less than or equal to). I would appreciate your help. I am having a lot of trouble on this problem and the help would be great. Thank you.
Click here to see answer by Alan3354(69443)

Question 519725: I need help in finding the domain of .
This is what I have:
1)
(x+7)(x-2)=0
x+7=0 OR x-2=0
x=-7 OR x=2
(,-7),(-7,2),(2,)
Test: -8 0 3
sign: + - +
(,-7)(2,)
2)

OR
OR

Domain= (,-7)(-7,2)(2,)
{x|x is a real number, x is not -7, x is not 2, ,}
Click here to see answer by Edwin McCravy(20056)

Question 519771: How u solve 2x-3y equal -19 can u please help me understand thank u
Click here to see answer by oberobic(2304)

Question 519829: I need to explain in detail how to solve the following problem: find the slope and y intercept of the given line X-7=0. Thanks in advance.
Click here to see answer by jim_thompson5910(35256)

Question 520198: for f(x)= 2-5x, find f(-2)
Click here to see answer by Tatiana_Stebko(1539)

Question 520207: let f(x)=x�-5x, find f(-2)
Click here to see answer by Tatiana_Stebko(1539)

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