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

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Question 1027843: true or false is this a function (2,-7),(0,2),(-7,3),(2,5)
Click here to see answer by macston(5194)

Question 1027845: Let f(x) = x^2 + 4x - 31. For what value of a is there exactly one real value of x such that f(x) = a?
Click here to see answer by ikleyn(52794)

Question 1027846: Let f(x) = 3x^2 - 4x. Find the constant k such that f(x) = f(k - x) for all real numbers x.
Click here to see answer by ikleyn(52794)

Question 1027842: Let f(x) = {2-3x}/{5-2x}. For what value of a is f(a) = 3?
Click here to see answer by macston(5194)

Question 1027848: Consider the functions
f(x) = sqrt((x+1)/(x-1)) and g(x) = sqrt(x+1)/sqrt(x-1)
Explain why f and g are not the same function.
Click here to see answer by Theo(13342)

Question 1027910: Domain
Colorado State Univ.
Univ. of Colorado
Univ. of Denver
The range is Colorado
Domain
Gonzaga Univ.
Univ. of Washington
Washington State Univ.
The range is Washington
I have to determine whether each correspondence is a function

Click here to see answer by josgarithmetic(39618)

Question 1027841: The function f(x) satisfies
f(sqrt(x+1)) = 1/x
for all x >= -1, x is not = 0. Find f(2).
Click here to see answer by robertb(5830)

Question 1027790: let f(x)= x+4/3x-2, find f (x) inverse and then verify that the cancellation properties are satisfied
Click here to see answer by Fombitz(32388)

Question 1028075: Let f be a function such that f(x+y) = x + f(y) for any two real numbers x and y. If f(0) = 2, then what is f(2012)?
Click here to see answer by richard1234(7193)

Question 1028125: How many functions are there from a set with three elements to a set with two elements?

Click here to see answer by richard1234(7193)

Question 1028197: f(x)=4-2x
g(x)=square root of 3+4x
What is f o g?
Click here to see answer by Cromlix(4381)

Question 1028199: X+y2(squared)=4
Determine whether y is a function of x
Click here to see answer by Theo(13342)

Question 1028200: f(x)= 3x^5-10x^4+6x^3+20x^2-97x+30
Find the zeros
Write in standard form
Click here to see answer by Alan3354(69443)

Question 1028288: I need help answering f(x)=x^2+3 and g(x)=-x+9 find(g-f)(-8)
Click here to see answer by Alan3354(69443)

Question 1028564: what is g(2c)=2c squared -2(2c)
Click here to see answer by Alan3354(69443)

Question 1028666: Let
f(x) = {3x - 7}/{x + 1}.
Find the inverse f^{-1}(x).
Click here to see answer by stanbon(75887)

Question 1028661: Let f(x) = x^2 - 2x. Find all real numbers x such that f(x) = f(f(x)).
Click here to see answer by robertb(5830)

Question 1028661: Let f(x) = x^2 - 2x. Find all real numbers x such that f(x) = f(f(x)).
Click here to see answer by richard1234(7193)

Question 1028661: Let f(x) = x^2 - 2x. Find all real numbers x such that f(x) = f(f(x)).
Click here to see answer by Natolino1983(23)

Question 1028649: Suppose a(x) = 3x - 7 and b(x) = 2 - x^3. Find a(b(3)) - b(a(3)).

Click here to see answer by robertb(5830)

Question 1028826: Show that the function f(x)=1-√1-x is continuous on the interval [-1,1] .the square root of 1-x squared
Click here to see answer by Fombitz(32388)

Question 1028783: If p(x) = 4x exponet 2 + 3, then p(negative 1/2)=
Click here to see answer by fractalier(6550)

Question 1029245: Which quadratic rule represents the data in the table

Click here to see answer by Edwin McCravy(20056)

Question 1029322: If f(x) = x2 and g(x) = 1/(2x + 3), find g(f(-1)).

Click here to see answer by josgarithmetic(39618)

Question 1028648: Let f(a,b) = 2a - 3b^2 + 7. If f(b,3) = 90, then what is b?
Click here to see answer by robertb(5830)

Question 1029593: My question is what the answer to this f(x)=2x^2-5x+3
Click here to see answer by ikleyn(52794)

Question 1029537: For the nonzero numbers a, b, and c, define J(a,b,c) = a/b + b/c + c/a.
Find J(2,12, 9).
Click here to see answer by Fombitz(32388)

Question 1029540: Define the operation $ as a$b= (a)(b) - a. What is the value of (3$5)$(5$3)?
Click here to see answer by Fombitz(32388)

Question 1029544: If f(x)=5x-12, find a value for x so that f^-1(x)=f(x+1).
Click here to see answer by fractalier(6550)

Question 1029539: Suppose a function f(x) is defined on the domain [-8,4]. If we define a new function g(x) by g(x) = f(-2x), then what is the domain of g(x)? Express your answer in interval notation.
Click here to see answer by robertb(5830)

Question 1029886: What are the coordinates of the points where the graphs of f(x)=x^3-x^2+x+1 and g(x)=x^3+x^2+x-1 intersect?
Click here to see answer by Boreal(15235)

Question 1029982: Let f be the function which associates to an integer n the number 1 if n is even, and -1 if n is odd
Find the following: f(2), f(3), f(145), f(-5), f(0). Can you find a formula for f?
Thank you for all your time!
Click here to see answer by solver91311(24713)

Question 1029969: f(x)= (2x^2-7)/x+2, prove with appropriate limit and work that a slant asymptote exists.
Click here to see answer by Edwin McCravy(20056)

Question 1030293: The population P(t) of a British Columbian town is modelled by the function P(t)=2t^2+80t+4000. Note: t=0 corresponds to the year 2000.When will the population double its current total? Explain how you got your answer.
Click here to see answer by josmiceli(19441)

Question 1030328: What are the coordinates of the points where the graphs of f(x)=x^3-x^2+x+1 and g(x)=x^3+x^2+x-1 intersect?
Give your answer as a list of points separated by semicolons, with the points ordered such that their x-coordinates are in increasing order. (So "(1,-3); (2,3); (5,-7)" - without the quotes - is a valid answer format.)
Click here to see answer by ankor@dixie-net.com(22740)

Question 1030317: find ( f o g)(-1) if f(x)=2x+1, g(x)= 5x-3
Click here to see answer by Fombitz(32388)

Question 1030424: Find all points (x,y) that are 13 units away from the point (2,7) and that lie on the line x - 2y = 10.
Give your answer as a list of points separated by semicolons, with the points ordered such that their x-coordinates are in increasing order. (So "(1,-3); (2,3); (5,-7)" - without the quotes - is a valid answer format.)
Click here to see answer by stanbon(75887)

Question 1030516: If f(x) = x^2 and g(x) = x - 3, then f(g(x)) = ? Thanks!
Click here to see answer by robertb(5830)

Question 1030646: Give the asymptote of the function:
g(x)=8^x ^+^7+2

Answer choices: -2, 0, 2, 1,3 Or none
Thank you
Click here to see answer by fractalier(6550)

Question 1030648: Give the asymptote of the function:
g(x)=-9-4^x
Click here to see answer by fractalier(6550)

Question 1030652: State the asymptote of the function:
g(x)=5^x+4
4
0
5
6
-4
None
Click here to see answer by fractalier(6550)

Question 1030653: State the asymptote of the function:
g(x)=8^x+7+2
-2
0
2
1
3
None
Click here to see answer by fractalier(6550)

Question 1030985: Evaluate the function given below for the following values: (a) x = �2, (b) x = 8.
f(X)=20x-4
Click here to see answer by fractalier(6550)

Question 1030984: Ron charges $10 to park a car in his parking lot. He pays $50 per day to rent the lot. If 40 cars park in his lot during the day, how much does he earn after expenses? Choose the correct solution to this problem.
Click here to see answer by fractalier(6550)

Question 1031199: For a particular quadratic function f(x)=ax^2+bx+c
f(-3)=-13 and f(2)=7. If a=-3, find b and c.
I know the points are (-3,-13) and (2,7).
Click here to see answer by Alan3354(69443)

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