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

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Question 256094: please help me with this
If the function f satisfies the equation f(x+y)=f(x)+f(y) for every pair of real numbers x and y, what are the posible values of f(0)?
any real number
any positive real nuber
0 and 1 only
1 only
0 only
and why?
Click here to see answer by CharlesG2(834)

Question 256135: state the function? input x -3 0 3 6
output y 1 0 -1 -2
Click here to see answer by drk(1908)

Question 256123: what is the smallest positive value for x where y= sin 2x reaches its maximum?
Click here to see answer by drk(1908)

Question 256149: what is g-f(x) where f(x) is x+1 and g(x) is x^2-1
Click here to see answer by drk(1908)

Question 256171: given the domain{-1,0,2} Find the range values for the equation.
a. f(x)=-2x-4
-2(-1)-4
2+-4
-2

b. -2(0)-4
0+-4
-4

c. -2(2)-4
-4+-4
-8

Click here to see answer by Edwin McCravy(20056)

Question 256179: my son is having problems with this equation i think it is titled elemination
this is how the problem is written:
5x-y=13
2x-y=1

Click here to see answer by Alan3354(69443)

Question 214031: if f(a+b) = f(a) + f(b) for all real numbers. Show how f(2a) = 2*f(a) and show how f(0) = 0.
Click here to see answer by Doni305(1)

Question 256350: NEED HELP PLEASE!!
Give an example of a function whose domain is the set of integers and whose range is the set of positive integers.
Click here to see answer by palanisamy(496)

Question 256438: Take a look at the table below and write out an equation for f(x). Show your work.

Click here to see answer by volfkr(1)

Question 256549: Can you please do a step by step informative answer for the following question? I am having to take a placement test and cannot for the life of me remember how to perform a function!!! Thanks!
The whole question goes as follows:
Listed below are 5 functions< each denoted g(x) and each involving a real number constant c>1.
If f(x)=2 to the x, which of these 5 functions yeilds the greatest value for
f(g(x)), for all x>1?
a. g(x)=cx
b. g(x)=c/x
c. g(x)=x/c
d. g(x)=x-c
e. g(x)=logsubscriptc x
HELP!
Click here to see answer by drk(1908)

Question 257222: what is the domain of the relation (1,4)(0,-2)(2,3)(-1,4)(-3,0)
Click here to see answer by drk(1908)

Question 257232: If f(x) = 3x � 7, determine f^-1(x) and write your answer as a single fraction
Click here to see answer by drk(1908)

Question 257320: writ an equation of the line containing the given point and parallel to the givenline. express your answer in the form y=mx+b. (6,9), x+6y=7.... the equation of the line is y =
Click here to see answer by jim_thompson5910(35256)

Question 257117: Determine the domain: h(x): 8x/x(x^2-36)
Click here to see answer by Fombitz(32388)

Question 257400: f(x)=-10x-8
What is the y intercept (0, )
The Slope is -10
Click here to see answer by richwmiller(17219)

Question 257523: Please help me solve this problem: Find the equation of the line with slope -1
that is the tangent to the curve y = 1/x-1.

(1 mark each for the general equation of the line, for getting the quadratic, for solving for k and for the solution)(Advanced functions)
I have started with the slope of -1 is in the form of y= -x+k (k is used instead of b to prevent confusion with the quadratic). The intersection of
this line with the curve y= 1/x-1 is found by solving -x+k = 1/x-1.
Rearranging the equation :
Then I would like to use the discriminant formula to solve for k, however, I am not sure how, and, if I have rearranged the equation correctly. I would appreciate your help with solving this problem. Thank you.
Click here to see answer by MRperkins(300)

Question 257618: Suppose that f(x) = ax + b, where a and b are real numbers.
Given that f(f(f(x))) = 8x + 21, what is the value of a + b?
Click here to see answer by jim_thompson5910(35256)

Question 257620: What is the product of 25 and 52 ?
Click here to see answer by shahbazn(6)

Question 257652: Take a look at the table below and compute an equation for f(x).
x -3, -2, 1, 3 4
f(x) 0, 3, 12, 18, 21
Click here to see answer by Alan3354(69443)

Question 257728: Find the function value.
F(x) = x to the third power.
F(-9) =
Click here to see answer by drk(1908)

Question 257746: Find the domain and range of the following function: f(x)= square root(x-1/x+1)
Click here to see answer by jsmallt9(3758)

Question 258094: The perimeter of a rectangle is 54. If the length is three more than twice the width, what are the dimensions of the rectangle?
Click here to see answer by checkley77(12844)

Question 258299: is y2=3x A FUNCTION
Click here to see answer by Theo(13342)

Question 258929: Here�s the problem:
For a car renting for $15 per day plus $.10 per mile, the cost for 1 day is
C(m)=15+o.10m (dollars)
where m is the number of miles driven. If the person paid $35.30 for 1 day�s rental, how far did the person drive?
Now I can look at this and know what the answer is, but I have to solve it using
L(a)=-2/3+150
I not only do not understand how to do it � I don�t understand the function.
Could you guide me through this please?

Click here to see answer by stanbon(75887)

Question 258971: What are the domains and ranges of this function?
Is it even a function at all?

Thank you for the help because I am really stuck on this problem.
Click here to see answer by stanbon(75887)

Question 259095: The area of my question is the evaluating of a function.
I am at a loss when even beginningto plug in the numbers where they need to go.
The problem reads: Given P(x)=4x+7, write P(-2+h)-P(-2) in simplest form.
Thanks tons any assistance is greatly appreciated.
Click here to see answer by Edwin McCravy(20056)

Question 259163: My question is in regards to graphing linear functions.
I need to graph y=2/3x-4 I am unsure how to graph it. Could you also explain why I graph it the way I do based on that formula. Thanks a lot. ANy help is appreciated.
Click here to see answer by rfer(16322)

Question 259139: I have a question concerning exclusion, domain and function.
THe question reads:
What values are excluded from the domain of the function:
H(x)=x-2/x+2
Any help is greatly appreciated

Click here to see answer by Fombitz(32388)

Question 259181: show work and solve
f(x)=4x-7 difference quotient (f(3+h)-f(3))/ h h is not equal to 0
Click here to see answer by Fombitz(32388)

Question 259760: I need help with this on please
For the function, f(x) = 3x + 6, find f( -1)
Click here to see answer by richwmiller(17219)

Question 259815: Mountainside Fleece sold 40 neck warmers. Solid color warmers sold for $9.90 each and colored ones sold for $12.75 each. In all $421.65 was collected. How many of each were sold?!
Click here to see answer by drk(1908)

Question 259809: p(x) = two squared - 2x+9

Click here to see answer by jim_thompson5910(35256)

Question 259878: Determine algebraically whether each function is even, odd, or neither.
a.f(x)=3x4
b.f(x)=7x3

Click here to see answer by nerdybill(7384)

Question 259965: The function p(q) = q^2 - 7 and f(s) = 9. If 2f(s) = p(q), what is the value of q?
(A) 2 (B) 3 (C) 4 (D) 5 (E) 6
Click here to see answer by rfadrogane(214)

Question 259879: If f(x)=2x2+3a+5, and f(1)=-2, then a = ?
Click here to see answer by checkley77(12844)

Question 260184: This one is an application problem: 16
During one month, a homeowner used 500 units of electricity and 100 units of gas for a total cost of $352. The next month, 400 units of electricity and 150 units of gas were used for a total cost of $304. Find the cost per unit of gas.
I am really unsure how to go about solving this
Click here to see answer by richwmiller(17219)

Question 260299: Hi, I need to find and simplify the difference quotient for f(x + h)- f(x), over h. Where f(x) = 3x + 7. The answer in the book is 3, where h cannot = 0. So I plug in 3x + 7 for every f(x), how do I solve this problem and why wouldn't the (3x + 7) and the -(3x + 7) cancel each other out? Thanks for your help, much appreciated.
Click here to see answer by drk(1908)

Question 261091: find the maximum domain of the function with rule f(x)=square root of 3-6x
please help i have been stuck on it for a while
Click here to see answer by stanbon(75887)

Question 261190: state the domain of the given function
f(x)=sqrt x+2

Click here to see answer by jsmallt9(3758)

Question 261218: Describe the transformation of g(x)=X3 to f(X)=-2/3(X+2)3+2

FYI- X3 IS X CUBED AND (X+2)3 THE 3 IS CUBED AS WELL
THANKS,
Click here to see answer by richwmiller(17219)

Question 261332: wat is the domain and range
g(x)={(5,2),(-3,4),(4,2),(-6,3}
also find g(-3)
Click here to see answer by drk(1908)

Question 261332: wat is the domain and range
g(x)={(5,2),(-3,4),(4,2),(-6,3}
also find g(-3)
Click here to see answer by Edwin McCravy(20056)

Question 261423: state the domain of the given function. thanks in advance
y = x / x-1
Click here to see answer by solver91311(24713)

Question 261423: state the domain of the given function. thanks in advance
y = x / x-1
Click here to see answer by roseo(33)

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