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

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 Algebra: Functions, Domain, NOT graphing Solvers Lessons Answers archive Quiz In Depth

 Question 103119: f(x)=-5x-2 x=4 Click here to see answer by MathLover1(6638)

 Question 101742: 3a+4-{-2-[-3-(a-1)]} Click here to see answer by edjones(7569)

 Question 103358: This is coming from the University of Houston online textbook, section 3.6 #39, if that helps anyone else. I'm not sure how to get "fog" when there is a number to multiply by. Given the functions f (x) = x2 + 2 and g(x) = 5x − 8 , find: (a) f (g(1)) (b) g(f (1)) (c) f (g(x)) (d) g(f (x)) (e) f ( f (1)) (f) g(g(1)) (g) f ( f (x)) (h) g(g(x)) Click here to see answer by stanbon(57395)

 Question 103388: find a linear function whose graph has a slope=-3 and a y-intercept of (0,-5) Click here to see answer by tutorcecilia(2152)

 Question 103531: WRITE THE DOMAIN OF THE FUNCTION IN INTERVAL NOTATION. n(x)= 1 NUMERATOR 2x^2+11x+12 DENOMINATOR I know you have to make the denominator equal o. So this is what I have tried, but it doesn't work. I'm having a brain freeze. (2x-12)(x+1) Please help. Click here to see answer by scott8148(6628)

 Question 103625: Find the domain of the function: f(x)= square root of (2x-8) ...then write your solution in interval notation Click here to see answer by jim_thompson5910(28598)
 Question 103625: Find the domain of the function: f(x)= square root of (2x-8) ...then write your solution in interval notation Click here to see answer by stanbon(57395)

 Question 103627: Find the domain of the function f(x)= (x+2)/(x^2-9) (write your solution in interval notation) Click here to see answer by jim_thompson5910(28598)

 Question 103919: Write in order the series of transformations that are applied to this parent. h(x)=1/2 x cubed - 4 Click here to see answer by stanbon(57395)

 Question 103989: Evaluate each function for the value specified. f(x)=x2-7x+10;find (a)f(0),(b)f(5),and (c)f(-2) Click here to see answer by jim_thompson5910(28598)

 Question 103750: I would like to know how I could show a real-life example of a linear function. Click here to see answer by elima(1433)

 Question 104050: Hello, could someone help me on these problems please? Thank you for your help. Find the zeros of the function algebraically. problem #21: f(x)=4x^3-24x^2-x+6 problem #22: f(x)=9x^4-25x^2 Click here to see answer by scott8148(6628)

 Question 104096: Rationalize the denominator 34 over radical 26 Click here to see answer by jim_thompson5910(28598)
 Question 104096: Rationalize the denominator 34 over radical 26 Click here to see answer by edjones(7569)

 Question 104146: Please Help me solve this problem f(x)=5x^2-8x g(x)=x^2-3x-40 Find f/g(x) I know that you set the problem up like this (f/g)(x)=5x^2-8x/x^2-3x-40 I am not sure if it can be factor or not?? If it can please show me the steps on how it is done and what the answer should be? Thank you so much Click here to see answer by stanbon(57395)

 Question 104163: the Question is: 100.)(2x+3)/(x^2+x+3) Find the Domain of the function, and identify any horizontal and vertical assymptotes. I have the following: Domain: all real numbers??? Horizontal assymptote at x=2 and I used the quadratic formula for the vertical assymptote and found imaginery assymptotes. AThis is where I got Lost!! Click here to see answer by stanbon(57395)

 Question 104165: the problem is 2x^3+3x^2-2x-3/x^2-3x+2 "check for intercepts, vertical assymptotes, horizontal assymptotes, slant assymptotes, and holes. I have: slant assymptote at 2x+9=y vertical assymptote at x=2 and x=1 No horizontal assymptotes Domain= all real numbers No hole in the graph Click here to see answer by stanbon(57395)

 Question 104168: What is the domain for y=15x/5x+10 Click here to see answer by jim_thompson5910(28598)

 Question 104189: I have to find how to work the problem so that x is the function of y. 1/2*y-7=3x Click here to see answer by edjones(7569)
 Question 104189: I have to find how to work the problem so that x is the function of y. 1/2*y-7=3x Click here to see answer by Earlsdon(6287)

 Question 104328: x=sqrt(4-y^2) ---I have to get "y" by itself? Click here to see answer by stanbon(57395)

 Question 104415: how do you figure out the equation for rectangular numbers? ex. the first term is 1, there are 2 dots, the second term is 2, there are 6 dots, the third term is 3, there are 12 dots. I see that the first difference is 2 more than the previous, and the second difference is 2, but how do i write this in an equation? Thank you. Click here to see answer by stanbon(57395)

 Question 104434: 1. The domain of function: f(x) = x-2 / x Click here to see answer by jim_thompson5910(28598)

 Question 104575: Solve for b: A=1/2bh Click here to see answer by stanbon(57395)

 Question 104881: I am having a hard time with functions, I need help on setting them up. Given f(x) = –x3power – x2power + 2x – 8, find f(–1), f(0), and f(2) Given f(x) = –5x – 1, find f(a – 1) Given f(x) = –2x – 4, find f(–3) Thanks so much, I am stressing out over this math. Click here to see answer by cheesey(22)

 Question 104937: f(x) = {-x , x <-1 x-2 , x > 1} Find a) f(-3/4)= b) f(-4)= Click here to see answer by Fombitz(13828)

 Question 104958: find the domain for the following: f(x) = sqrt (3x-4) g(x) = (-2x+1) / (1-3x) Click here to see answer by Fombitz(13828)

 Question 104962: Find the vertex, and the x and y intercepts by completing the following: f(x) = -x^2 + 6x - 8 Click here to see answer by MathLover1(6638)

 Question 105056: Solve for b2 A=1/2h(b1+b2) Click here to see answer by ankor@dixie-net.com(15661)

 Question 105154: Can you please take the time to help me solve this problem: Find the domain of f(x) if f(x) = [ x / (x2 – x – 2) ]. Thank you Click here to see answer by Fombitz(13828)

 Question 105156: Can you please take the time to help me solve this problem: If f(x) = x2, then find { [ f(x+h) – f(x) ] / h } in terms of x and h. Thank you Click here to see answer by Fombitz(13828)

 Question 104721: Could you please help me to solve this problem? Suppose national consumption, C, is \$18 billion when disposable income, x, is \$12 billion, and is \$24 billion when disposable income is \$18 billion. Assume that national consumption is linear where C is a function of x and write the national consumption function. Click here to see answer by edjones(7569)

 Question 105591: Can you please take the time to help me solve this problem: Give an example for f(x), if f(x) is an increasing function between 2 and 3. Thank you for helping me. Click here to see answer by MathLover1(6638)

 Question 105674: consider the following quadratic function. Reduce all fractions to the lowest terms. Find the vertex. h(x)=(x-2)(x+6)+16 Click here to see answer by MathLover1(6638)

 Question 105672: I cant solve this we are supposed to find the domain of this function (this is Algebra 1) y = 1 _____ x + 4 Click here to see answer by bucky(2189)

 Question 105673: I cant solve this we are supposed to find the domain of this function (this is Algebra 1) y = 1 _____ x + 4 Click here to see answer by Fombitz(13828)

 Question 105703: Find the center and the radius of the circle give by x^2+8x+y^2+6y-24=0 Click here to see answer by Fombitz(13828)

 Question 105759: Find the domain of y=1/(x+1)(x-3) Write the domain in interval notation Click here to see answer by jim_thompson5910(28598)

 Question 105924: Please explain g(x)+ x to the second power + 7 ; g(0) and g(-1) Click here to see answer by edjones(7569)

 Question 106277: FIND THE DOMAIN AND RANGE OF THE FUNCTION F(X)= (X-3)SQUARED +3 Click here to see answer by stanbon(57395)
 Question 106277: FIND THE DOMAIN AND RANGE OF THE FUNCTION F(X)= (X-3)SQUARED +3 Click here to see answer by tutorcecilia(2152)

 Question 106638: 14. Which of the ordered pairs (3, 1), (0, –4), (–4, 0), (–3, –7) are solutions for the equation x – y = 4? A) (0, –4), (–4, 0), and (–3, –7) B) (–4, 0) and (–3, –7) C) (0, –4) and (–3, –7) D) (3, 1) and (–4, 0) Click here to see answer by elima(1433)
 Question 106638: 14. Which of the ordered pairs (3, 1), (0, –4), (–4, 0), (–3, –7) are solutions for the equation x – y = 4? A) (0, –4), (–4, 0), and (–3, –7) B) (–4, 0) and (–3, –7) C) (0, –4) and (–3, –7) D) (3, 1) and (–4, 0) Click here to see answer by jim_thompson5910(28598)
 Question 106638: 14. Which of the ordered pairs (3, 1), (0, –4), (–4, 0), (–3, –7) are solutions for the equation x – y = 4? A) (0, –4), (–4, 0), and (–3, –7) B) (–4, 0) and (–3, –7) C) (0, –4) and (–3, –7) D) (3, 1) and (–4, 0) Click here to see answer by cheesey(22)

 Question 106807: I have this question, but I'm not sure how to solve it because it is cubed, I'm pretty sure its squared but I still dont know how to solve it. Someone please help me, thank you!! Find the inverse for , and verify that the functions are inverses of each other. Click here to see answer by Earlsdon(6287)

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