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

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Question 229498: Find the domain of the function:
g(x) = 7/2-5x
A. x is a real number and x/=0
B. x is a real number and x >= 2/5
C. x is a real number and x /= 7
D. x is a real number and x /= 2/5 ?
Click here to see answer by edjones(8007)

Question 229504: write the following without using logarithims.
ln a - ln b + xy = 0
Thanks!
Click here to see answer by nerdybill(7384)

Question 229675: Try to find f(x)andg(x)such that h(x)=f(g(x))(x)
h(x)1/(x^2-3)
Click here to see answer by solver91311(24713)

Question 229892: find the inverse of f(x)= 1/3x^3+1 is it one-to-one, why or why not?
Click here to see answer by stanbon(75887)

Question 229892: find the inverse of f(x)= 1/3x^3+1 is it one-to-one, why or why not?
Click here to see answer by jsmallt9(3758)

Question 229920: 1. The imput variable is called the _ variable.
2. The output variable is called the _ variable.
Click here to see answer by solver91311(24713)

Question 230026: Is the equation a function? Why or why not?
x^2+x^3+y=6x
I put it in slope-intercept form like so: y=6x-x^5
Also, is this a function, why or why not?:
y^2+2x-4=o
Thank you for your time
Click here to see answer by rapaljer(4671)

Question 230359: if g(x)=x squared+1 find the value of g(t)-4
Click here to see answer by user_dude2008(1862)

Question 230469: Evaluate the piecewise function at the given value of the independent variable.
f(x)=
{3x+1 if x<-1
{-2x-5 if x≥-1
;
f(2)

Click here to see answer by stanbon(75887)

Question 230516: I need to find the domain of: 7x^2-2x+12
How do I find the domain, please explain this to me so I know how to solve other problems like it. Please help!
Click here to see answer by rapaljer(4671)

Question 230577: Hi. I was wondering if you could help me with this problem.
Given that f(3)=12 and f(5)=-2 find f(1/7)
I've tried the f(x)=mx+b formula
f(3)=m(3)+b=12
f(5)=m(5)+b=-2
5-3=2m and -2-12=-14
M=-14/-2
M=-7
And this is where I get stuck.
Thank you
Click here to see answer by jsmallt9(3758)

Question 230615: Given functions f and g, perform the indicated operations.
f(x)=2x-6
g(x)=9x-8
find f-g.
Click here to see answer by stanbon(75887)

Question 230655: functions G and F determine: a) (f�g)4) b) (g�f)(2) c) (F�F)(1) d) (g�g)(0)
Function to solve F(x)= 3/x^2+1; g(X)=sqr X
Click here to see answer by jsmallt9(3758)

Question 230719: I need help simplifying this equation:

I feel dumb for asking, but I can't seem to figure how I should start simplifying these type of functions.
Thank you in advanced~
Click here to see answer by stanbon(75887)

Question 230847: f(x)=-9x/4 +7 Need the algebraically inverse function
Click here to see answer by likaaka(51)

Question 230938: Find the indicated composition.

(f*g)(8)
Click here to see answer by likaaka(51)

Question 231151: Evaluate: [4.2] + [-4.1] + 3[-4.1] - [-4]
This is a GIF (Greatest Integer Function) Problem!
Thanks!
Click here to see answer by user_dude2008(1862)

Question 231313: given the function h described by h(x)= 9(x)
find the following:
h(-12)=
h(5)=
h(32)=
Click here to see answer by stanbon(75887)

Question 231654: I need help with parent function transformations
f(x)=-4(x+2)3cubed
Click here to see answer by checkley77(12844)

Question 231765: given the function f described by f(x)=x+18 find each of the following
f(0)= 18
f(-15)=-15+18=3
f(-14)=-14+18=4
f(5)=5+18=23
f(c+12)=(c+12)+18= c+30
Click here to see answer by curioustoknow(5)

Question 231947: If f(2m + 1) = 24m^3 + 36m^2 + 26m, what is f(x)?
Click here to see answer by stanbon(75887)

Question 231974: Hi,

Given the function F described by F(z)=2z^(2)+8z-3
Find the function value f(-7)=?
Thank you
Click here to see answer by vleith(2983)

Question 232209: How do you find the domain and range for the following Points?
{(1,3) (1,0) (1,-2) ( 1,8)} And is it a function. Thank you
Click here to see answer by solver91311(24713)

Question 232753: Do the domain and range have to be put in numerical order?
Click here to see answer by rfer(16322)

Question 232754: How do you know if a relation is a function?
Click here to see answer by dpaulin(12)

Question 232902: hi im having trouble doing my aldebra homwork and im in grade six do u ahve any ideas that will help me with this
Click here to see answer by unlockmath(1688)

Question 232981: A photographer charges a sitting fee of$15 plus $3 for each pose. Write a function to describe the situation.
Click here to see answer by rfer(16322)

Question 233052: hello
Click here to see answer by Alan3354(69443)

Question 233228: State the domain for the following experssion
(x+5)/(x^2-36)
Click here to see answer by stanbon(75887)

Question 233239: Write the quotient
(2x^3+x^2-x+4)/(2x-5)
Click here to see answer by stanbon(75887)

Question 233260: Find f + g and f � g.

f(x)=3x squared plus 2x, g(x)=-x suared plus 4x
Click here to see answer by edjones(8007)

Question 233361: For the given functions f(x)= 3/(x-4) and g(x) = x/2 find (f(g(x)). I started the problem by substituting x/2 in for f(x), so I get to f(g(x)) = 3/((x/2) -4).
Click here to see answer by stanbon(75887)

Question 233372: f(x) = 2-x^2 find (f(3+h)-f(3))/h
f(3)=2-9=-7
f(3+h)=2-(3+h)^2=2-(h^2+6h+9)=-7-h^2-6h
so (f(3+h)-f(3)) = -7-h^2-6h - -7 = -h^2-6h
then (f(3+h)-f(3))/h = -h-6 can I make that h+6 or not?? Did I do this correctly?
Click here to see answer by stanbon(75887)

Question 233543: find the domain the x2 the 2 is squared
p(x)= x2 + y
Click here to see answer by rapaljer(4671)

Question 233549: Can anyone please help me make sense of this?? Thank you so much for your time!
Assuming that a, b and a/b(a divided by b) are whole numbers and b is not equal to 0. Explain why (a / b) xb= a ((a divided by b) x b = a).
Click here to see answer by stanbon(75887)

Question 233746: Rewrite the equation so that x is a function of y.
-10x= -5y-65
Click here to see answer by user_dude2008(1862)

Question 233752: Rewrite the equation so that y is a function of x
-10x= -5y-65
Click here to see answer by rfer(16322)

Question 233754: Rewrite the equation so that y is a function of x.
6y - 6x = 15
Click here to see answer by rfer(16322)

Question 233754: Rewrite the equation so that y is a function of x.
6y - 6x = 15
Click here to see answer by stanbon(75887)

Question 234361: What is the common difference?
0,-2,-4,-6
Click here to see answer by stanbon(75887)

Question 234397: Take a look at the table below and write out an equation for f(x).
x -2 -1 0 1 2
f(x) -2 2 6 10 14

Click here to see answer by stanbon(75887)

Question 234367: i have two tables i have to write functions rules for i know what the difference is between them but i dont know who to write it or explain it my book doesnt show me the first table is x- 1,2,3,4 y- 25,30,35,40
the second table is x-1,2,3,4 y $10.00, $12.50,$15.00,$17.50 im sure i can do it i just dont know how to write it please help me
Click here to see answer by scott8148(6628)

Question 234519: Good Morning
I was wondering if you could help me with this problem
Given F(x)=x^2+2 , Find F(a+2)-F(a)
I did
(a+2) (a+2)
a^2+4a+4
a^2+4a+4-a^2
Answer 4a+4
I'm not sure if this is correct though.
Thank you
Click here to see answer by stanbon(75887)

Question 234572: Hi again
A quick question about the domain and range of the relation:
(x,y): x^2+y^2<6
This relation has 19 ordered pairs that satisfy it.
I think the answer is either
Domain= -2<=x<=2 Range= -2<=y<=2
Or
Domain= {-2,-1,0,1,2} Range= {-2,-1,0,1,2}
I'm leaning toward the second choice yet I'm really unsure.
Thank you
Click here to see answer by stanbon(75887)

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