# 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 519729: I don't understand how to do this: Find the domain of: Thanks in advance :)! Click here to see answer by josmiceli(9680)

 Question 519763: I need step by step instructions on how to graph a step function. I don't need to see the graph but to just be instructed by words. The step function is f(x) = 2[x] (ceiling function) for the domain -2 < x < 1 (the less than signs are less than or equal to). I would appreciate your help. I am having a lot of trouble on this problem and the help would be great. Thank you. Click here to see answer by Alan3354(30993)

 Question 519725: I need help in finding the domain of . This is what I have: 1) (x+7)(x-2)=0 x+7=0 OR x-2=0 x=-7 OR x=2 (,-7),(-7,2),(2,) Test: -8 0 3 sign: + - + (,-7)(2,) 2) OR OR Domain= (,-7)(-7,2)(2,) {x|x is a real number, x is not -7, x is not 2, ,} Click here to see answer by Edwin McCravy(8909)

 Question 519829: I need to explain in detail how to solve the following problem: find the slope and y intercept of the given line X-7=0. Thanks in advance. Click here to see answer by jim_thompson5910(28595)
 Question 519829: I need to explain in detail how to solve the following problem: find the slope and y intercept of the given line X-7=0. Thanks in advance. Click here to see answer by oberobic(2304)

 Question 520376: how would find the value of 3[f(-2)] if f(x)=4x+2? Click here to see answer by stanbon(57347)
 Question 520376: how would find the value of 3[f(-2)] if f(x)=4x+2? Click here to see answer by solver91311(16885)

 Question 520683: Identify the vertex of the graph of f(x)=(x-5)^2-8 Click here to see answer by Math_prodigy(21)

 Question 521539: Find (f*g)(x) and (g*f)(x) for each f(x) and g(x) f(x)=x+5 g(x)=x-3 Click here to see answer by stanbon(57347)

 Question 522064: I f x + 1 / x = 3 t h a n x 2 + t / x 2 = ? Click here to see answer by Maths68(1474)

 Question 522270: f(x)=9x^4-25^2 how to find the zero of the function algebraically Click here to see answer by stanbon(57347)

 Question 522419: Write an equation in functional notation using this word problem.. Martin earns \$7.50 per hour proofreading ads at a local newspaper. His weekly wage, w, can be described by the equation w = 7.5h, where h is the number of hours worked. Click here to see answer by solver91311(16885)

 Question 522819: suppose that f and g are a pair of inverse functions. if g(-8)=3, what is f(3)? Click here to see answer by jim_thompson5910(28595)

 Question 523233: what is the domain of f(x)= the square root of (x-4) over the set of real numbers? Click here to see answer by lwsshak3(6505)

 Question 523284: evaluate the function rule f(a)=-3a+5 to find f(-3) Click here to see answer by Alan3354(30993)

 Question 523285: evaluate the function rule f(a)=-3a+5 to find f(-3) Click here to see answer by Alan3354(30993)

 Question 523306: to convert a length in inches to centimeters c, multiply by 2.54 give the domain range & formula Click here to see answer by stanbon(57347)

 Question 523528: I need to find the domain of this equation: f(x)=4/3x+7 Click here to see answer by oberobic(2304)

 Question 525668: My problem is: (x+5)^2 + 4(x+5) - 32 I don't understand how to do this problem at all, but I did try. I somehow simplified it into this: x(x + 4 + 32/x) I asked my teacher if I did it right and she said no, but didn't tell me the right answer or how to do it. I am in honors Algebra II and she says she shouldn't have to teach an honors student. So, I need help because I can't figure it out, and I don't even know what I am doing. Could you please help me? Click here to see answer by Maths68(1474)
 Question 525668: My problem is: (x+5)^2 + 4(x+5) - 32 I don't understand how to do this problem at all, but I did try. I somehow simplified it into this: x(x + 4 + 32/x) I asked my teacher if I did it right and she said no, but didn't tell me the right answer or how to do it. I am in honors Algebra II and she says she shouldn't have to teach an honors student. So, I need help because I can't figure it out, and I don't even know what I am doing. Could you please help me? Click here to see answer by solver91311(16885)

 Question 525839: If f(x)=3x+7 and g(x)=x-2x find the value of f(-2) Click here to see answer by Tatiana_Stebko(1326)

 Question 525838: If f(x)=3x+7 and g(x)=x-2x find the value of f(3) Click here to see answer by Tatiana_Stebko(1326)

 Question 525866: What is the rule that represents the function of the following ordered pairs? (0,1), (1,3), (2,9), (3,27), (4,81) I have been working on this for 2 hours and cannot figure it out. Thank you. Click here to see answer by jim_thompson5910(28595)

 Question 525956: f(x) = x + 7 g(x) = sqrt (x) f + g f - g fg f/g Click here to see answer by edjones(7569)

 Question 526182: What does ! mean? As in 5!. I heard it means down factoring. (5*4*3*2*1) or 120? Am I correct or wrong. If so what. Thanks. Click here to see answer by Alan3354(30993)