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

Tutors Answer Your Questions about Functions (FREE)

Question 528004: Given f (x) = 7x + 8 on the domain of all real numbers, find f -1(x).
Click here to see answer by jim_thompson5910(35256)

Question 528180: how do you now if its a function?
Click here to see answer by solver91311(24713)

Question 528184: how do you now if its a function?
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Question 528217: The one to one functions g and h are defined as follows:
g={(-6,-9),(5,-5),(6,-8),(9,6)}
h(x)=2x+13
Find the following:
g^-1(6)=
h^-1(x)=
h^-1∘h)(-4)=
Thanks for your help!

Click here to see answer by stanbon(75887)

Question 528564: {(-5,7),(0,0),(2,-8),(5,-20)} need to find the domain and range for each relation
Click here to see answer by jim_thompson5910(35256)

Question 528678: Find the x intercept of the function using algebra
Y=sqrt(2x-3)-sqrt(2x)+1
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Question 528114: which point of the graph f(x)=x^2 are the closest to the point (2, 0.5)?
Click here to see answer by htmentor(1343)

Question 528826: Determine whether the relation is a function. (2,2), (5,-2),(7,-4), (10,-2)
Click here to see answer by solver91311(24713)

Question 529595: Please help, i can't figure this out. Thank you.
Suppose that the relation H is defined as follows.
H = { (-7,-8),(3,0),(7,-8) }
give the domain and range of H, write answer using set notation.
Domain=
Range=
Click here to see answer by KMST(5328)

Question 529761: f(x)=7x+2 Find f(x) when x=0andwhen,x=1
Click here to see answer by jim_thompson5910(35256)

Question 530093: is x=-2 a function?
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Question 530407: find the zeros of the function given by
f(x)=2x^2-11x+15
Click here to see answer by jim_thompson5910(35256)

Question 530483: Actually some of my problems involve graphs, but maybe I can still get help on a couple other problems.
Find the domain p(x)=x^2+10.
I know all the numbers are real numbers but my question involves whether the solution is equal to or greater than. Like so; {xIx is a real number and x = 10}(with a slash through the equal sign). I chose that as my answer; can someone double check to see if I'm correct. The other options are
{xIx is a real number and x=0} (with a slash through the = sign)
{xIx is a real number and x>0}
and
{xIx is a real number}
Does anyone or whomever I'm writing to understand what the question is asking? This is Algebra 1.
Click here to see answer by jim_thompson5910(35256)

Question 530490: what is a rule for the function repersented by (o,-2),(1,-1),(2,2),(3,7)? Explain your reasoning.
Click here to see answer by stanbon(75887)

Question 530490: what is a rule for the function repersented by (o,-2),(1,-1),(2,2),(3,7)? Explain your reasoning.
Click here to see answer by josmiceli(19441)

Question 530417: what is f(.75) for the function f(x)= 7x?
Click here to see answer by oberobic(2304)

Question 530499: What is the range of the equation f(x)= x^2-7x+5
Click here to see answer by reviewermath(1029)

Question 530290: I still don't get it, please help me.
A firm has a fixed cost of $28000. For every unit of the product it makes, the cost increases by 0.4x +222$ where x is the number of units produced. The selling price of the product is given by the function p(x) = 1250 - 0.6x. What is the maximum number of units the firm can make and sell, and still make a profit?
Click here to see answer by bucky(2189)

Question 530754: solve for x
8(x-3)-5(x-2)= 6
8(2x-3)-5(3x-4)=10
Click here to see answer by nahataba(3)

Question 530857: f(x)=6x find the value f(m)
Click here to see answer by jim_thompson5910(35256)

Question 530868: -4r-11=4r+21 solve and check solution
Click here to see answer by jim_thompson5910(35256)

Question 530865: solve and check solution
5x-3=13-3x
Click here to see answer by jim_thompson5910(35256)

Question 530873: 1-m=6-6m solve and check solution
Click here to see answer by jim_thompson5910(35256)

Question 530873: 1-m=6-6m solve and check solution
Click here to see answer by oberobic(2304)

Question 530881: What is the missing value for (3,2) and (6,y) ?
Click here to see answer by jim_thompson5910(35256)

Question 530829: if f(x) = 6x find the value f(m)
Click here to see answer by richard1234(7193)

Question 531147: If gloria received a 6% raise and is now making 22,260 a year, what was her salary before the raise?
Click here to see answer by josmiceli(19441)

Question 531240: Let f(x) = 3x. Find f( 2)
Click here to see answer by stanbon(75887)

Question 531316: h(x)=(6x+1)/(-7-x), find h^-1
find domain
find range
Click here to see answer by stanbon(75887)

Question 531531: For the real- valued functions f(x)= (x-4)/(x+3) and g(x)=4x-15 , what is the composition f(g(x)) and its domain using interval notation?
Click here to see answer by stanbon(75887)

Question 531729: what is the domain of x^2+y^2=36. And how does it look like on a graph??
Click here to see answer by stanbon(75887)

Question 531733: explain domain and range of a function,in what circumstanes would the domain be something other than a real number?
Click here to see answer by richard1234(7193)

Question 532172: What is the function rule of (0,1) (1,3) (2,9) (3,27) (4,81)? Thanks sooo much!
Btw, this is free right?
Click here to see answer by scott8148(6628)

Question 532172: What is the function rule of (0,1) (1,3) (2,9) (3,27) (4,81)? Thanks sooo much!
Btw, this is free right?
Click here to see answer by Alan3354(69443)

Question 532379: If f(x)=x^2-3 and f(a)=46, what is the value of a? Explain.
Click here to see answer by lmeeks54(111)

Question 532688: state the domain of f(x)=3x-5
Click here to see answer by stanbon(75887)

Question 532673: Q varies directly as x and inversely as a square root of y and if Q=14.70 when x=-6 and y=6 find Q when x=7 and y=10. Round to the nearest hundreth. I have no idea how to begin to complete this.
Click here to see answer by lwsshak3(11628)

Question 533051: I need to solve this by substitution
y=2x+3
y=4x-1
Click here to see answer by oberobic(2304)

Question 533206: I am not understanding these Adavanced Functions and could use some help please.
f(x)=-3x-3 and g(x)=x^2+2x find (f-g)(2)
Click here to see answer by stanbon(75887)

Question 533206: I am not understanding these Adavanced Functions and could use some help please.
f(x)=-3x-3 and g(x)=x^2+2x find (f-g)(2)
Click here to see answer by KMST(5328)

Question 533327: Let f(x)=x-7/x+5 and g(x)=x+3/x-4
f(x)=g(x)
I am stumped and maybe if i got the answer it could help me learn the process.
Click here to see answer by Alan3354(69443)

Question 533657: this is a word problom from my college algebra I book that deals with Inverse Functions: "John owns a hotdog stand. He has found that his profit is represented by the equation P=-x^2+56x+77, with P being profits and x the number of hotdogs. How many hotdogs must he sell to earn the most profit? What will be his maximum profit?"
Click here to see answer by Earlsdon(6294)

Question 533724:
Click here to see answer by fcabanski(1391)

Question 534620: a patio should drop between one-eighth and one-fourth inch for each foot away from the house. what should the total drop be for a patio at a point 20 feet from the house?
Click here to see answer by solver91311(24713)

Question 534751: Find the equation for the tangent line to the curve y= f(x) where through the point (1, -3) where f(x)= x^8- 4x
Click here to see answer by Alan3354(69443)

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