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

Tutors Answer Your Questions about Functions (FREE)

Question 892311: Does the function f(x)=x^2 have an inverse function? Explain why or why not and illustrate with a sketch of the inverse
Click here to see answer by Fombitz(32388)

Question 892652: what is x and state the domain of the function 3x^2-2x^2=x

Click here to see answer by nerdybill(7384)

Question 892677: Find two different polynomials j(x) and g(x) such that the degree of each polynomial is greater than 1 and j(5) = g(5) = 0. I don't even know where to start.
Click here to see answer by josgarithmetic(39618)

Question 892787: Find the domain
f(x) =
8
_________
2(x)+3
Click here to see answer by Fombitz(32388)

Question 893085: Here's the problem: If there are originally 25 bacteria, at what rate are they growing if the population of the bacteria doubles in 5 hours? (Hint:solve 50=25(1+r)^5)
Click here to see answer by josgarithmetic(39618)

Question 893360: determine the value of k so that the lines kx-y=-1/3 and 3y=1-6x will intersect at one point
Click here to see answer by josgarithmetic(39618)

Question 893360: determine the value of k so that the lines kx-y=-1/3 and 3y=1-6x will intersect at one point
Click here to see answer by josmiceli(19441)

Question 893411: difference between equation
and funtion?
Click here to see answer by Alan3354(69443)

Question 893411: difference between equation
and funtion?
Click here to see answer by Theo(13342)

Question 893426: For each function, find:
a.f'(x)
b.f"(x)
c.f"'(x)
d.f^(4)(x)
f(x)= x^4-2x^3-3x^2+5x-7
Little confused on second derivatives. Can someone help me understand this. Thanks
Click here to see answer by Alan3354(69443)

Question 882807: x2.y=k

Click here to see answer by tommyt3rd(5050)

Question 882247: let f(x)=2x^2 and evaluate (f(x)-f(a))/(x-a)
Click here to see answer by tommyt3rd(5050)

Question 882246: If f(x)=3x^2-4x+1 and g(x)=2x-1, evaluate f[g(-2)]
Click here to see answer by tommyt3rd(5050)

Question 893508: Please help me solve
H(x)= 8x over x(x^2-49)
Click here to see answer by josgarithmetic(39618)

Question 882924: for the function
Find the maximum number of real zeros that the function can have, the maximum number of x-intercepts that the function can have, and the maximum number of turning points that the graph of the function can have
Click here to see answer by tommyt3rd(5050)

Question 893548: please elaborate the difference between expressions and functions?in very very simple manner i am asking this question 2nd time because i was not satisfied with privious answer please state in simple manner,thanking in advance.
Click here to see answer by ankor@dixie-net.com(22740)

Question 893843: please advise ME HOW TO CALCULATE 1/5+1/3.5+1/2

Click here to see answer by Fombitz(32388)

Question 893780: Use a graphing utility to graph the function and estimate its domain and range. Then find the domain and range algebraically. (Enter your answers using interval notation.)
f(x) = − 1/3|x − 4|
Click here to see answer by Fombitz(32388)

Question 894019: Please help me solve this problem.
Find the value of K so the given line has the given slope.
Line through (k+1, k-1)(k,-k); m=k+1
This is review and it's been 2 years since I've done algebra. I tried y+k=k+1(x-(k+1))
Click here to see answer by reviewermath(1029)

Question 894190: We are studying functions with maximums and minimums and i need to know weather y=3x^2 is a maximum or minimum and the vertex.
Click here to see answer by rfer(16322)

Question 894293: I'm quite lost, was wondering if anyone could help me.
The function g is defined below
g(x)= x+1/x^2+7x-18
Find all values of x that are not in the domain of g.
If there is more than one answer, separate them with commas.
I have no idea what a function or domain actually is and to be perfectly honest, I'm fairly worried I'm in over my head. I appreciate any and all help!
Click here to see answer by josgarithmetic(39618)

Question 894322: Hi!
Given that
x^2-14x+a=(x+b)^2 for all values of x, find the value of a and the value of b.
I find this one very difficult, so it would be lovely if you can help me.
I�ve tried to solve it with quadratic equation and I have tried to split in to two equations.
Thank you!
Klara
Click here to see answer by reviewermath(1029)

Question 894351: k (x)=x+4/x=3 what is the internal notation
Click here to see answer by Fombitz(32388)

Question 894434: Let f(t)=2-3t^2. Find
(A) f(-2) (B) f(-t)
(C) -f(t) (D) -f(-t)
Click here to see answer by alakazam2192(3)

Question 893550: are all equations functions if not state in simple manner why?
Click here to see answer by harpazo(655)

Question 894849: g(x)= 9 - 4x
Click here to see answer by Fombitz(32388)

Question 894939: What is the domain of (1-x^2)^1/2
I know the answer is [-1,1] but how do you solve the radicand after setting it greater than or equal to zero?
Click here to see answer by lwsshak3(11628)

Question 894893: How would I complete this equation correctly by stating the correct domain?
{(a, b): ab = 12}
Click here to see answer by Fombitz(32388)

Question 894986: Calculate the derivative of (1+e^x)/(1+e^(2x))
Click here to see answer by harpazo(655)

Question 895015: Find f(k) when f(x)=3x^2 + 4x + 5
I dont understand what to do with the f(k)? Please explain to me how to solve this problem.
Click here to see answer by reviewermath(1029)

Question 895015: Find f(k) when f(x)=3x^2 + 4x + 5
I dont understand what to do with the f(k)? Please explain to me how to solve this problem.
Click here to see answer by harpazo(655)

Question 895114: Please help me find the domain to this function. I understand that denominators cannot be 0 and that anything under a square root must be positive but I keep getting stuck on this equation :
Click here to see answer by reviewermath(1029)

Question 895275: i need help. the problem ask to find P(x-4) if P(a)=a^3 -5. I am confused because of the difference in variables. Any help will be greatly appreciated, thank you
Click here to see answer by reviewermath(1029)

Question 895264: w(t)=-2+-1; find w(-7)
Click here to see answer by jim_thompson5910(35256)

Question 895370: If a linear function f satisfies the given conditions, find f(x)
f(-2)= 7 and f(4)= -2
f(x)=
I have been trying to solve this for hours and can never get a correct answer.
Please show step by step how to solve! thank you!
Click here to see answer by richwmiller(17219)

Question 895701: Domain of (x+5)/(x^3-64x)
Click here to see answer by lwsshak3(11628)

Question 895851: (x^3/4)/root(4,x)
Click here to see answer by Fombitz(32388)

Question 895851: (x^3/4)/root(4,x)
Click here to see answer by Alan3354(69443)

Question 895910: Express the rule in function notation. (For example, the rule "square, then subtract 5" is expressed as the function
f(x) = x2 − 5.)
Add 9, then multiply by 2
Click here to see answer by Fombitz(32388)

Question 895930: What is the Domain of the function h(x)= 1/(4sqrt(x^2-12x))in interval notation?
Click here to see answer by lwsshak3(11628)

Question 895970: How do I solve this: If (z � z)(x)=1/16x , what is z(x)?
Click here to see answer by stanbon(75887)

Question 895989: C=2x3.14r

Click here to see answer by Alan3354(69443)

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