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

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 Question 761158: the point (1,1) is on the graph what is the new location of the point on the graph y=-x Click here to see answer by tommyt3rd(3721)

 Question 760056: Let f(x)= x+2 and g(x)= x squared. Find (g of x) (-5) Click here to see answer by tommyt3rd(3721)

 Question 758958: Evaluate the function r(x) = x/x+4, find r (1/2) Click here to see answer by tommyt3rd(3721)

 Question 758033: how can you say that the given equation represent a function? Click here to see answer by tommyt3rd(3721)

 Question 763327: what is the domain of this function √3:(x-4) Click here to see answer by josgarithmetic(3309)

 Question 763426: Why or how does 4(2t-1)squared = 4t squared - (minus) 4t + 1 ? I cannot figure out where the minus 4t comes from. Click here to see answer by Alan3354(34674)

 Question 763502: determine whether the equation defines y as a function of x y=x2 and x=y2 Click here to see answer by MathLover1(7480)

 Question 763574: I have to find the Domain of g(x)= 3-2√(5-x). i've gone on to mathway.com where it solved it for me but it wont show me the step by step. i've tried moving the 3 over then dividing everything by 2 then squaring everything to get rid of the square root. but then after that i don't know what to do. i've tried searching all night for some form of example online of how to do this problem but none of the examples have numbers in front of the square root so i have no idea what to do with them. :( Click here to see answer by josmiceli(10616)
 Question 763574: I have to find the Domain of g(x)= 3-2√(5-x). i've gone on to mathway.com where it solved it for me but it wont show me the step by step. i've tried moving the 3 over then dividing everything by 2 then squaring everything to get rid of the square root. but then after that i don't know what to do. i've tried searching all night for some form of example online of how to do this problem but none of the examples have numbers in front of the square root so i have no idea what to do with them. :( Click here to see answer by josgarithmetic(3309)

 Question 763670: Solve the inequality. |x + 5| > 12 Click here to see answer by jim_thompson5910(29613)

 Question 763742: I need help solving for x in this equation: I've tried working through it, but I'm not getting anywhere. Thank you for any help! Click here to see answer by Lola77479(27)
 Question 763742: I need help solving for x in this equation: I've tried working through it, but I'm not getting anywhere. Thank you for any help! Click here to see answer by solver91311(18785)

 Question 764104: The radius of a spherical balloon is increasing at a rate of 7 cm per second. Derive the composite function, V(t), for the volume of the balloon in terms of time t and use it to determine the volume of the balloon after 8 seconds. Thanks for any help. Click here to see answer by Alan3354(34674)

 Question 764187: 1. f(x)=1-x, g(x)=1+x Find. 1.(fog) (x) 2.(fog) (-2) 3. (gof) (-1) Click here to see answer by stanbon(60771)
 Question 764187: 1. f(x)=1-x, g(x)=1+x Find. 1.(fog) (x) 2.(fog) (-2) 3. (gof) (-1) Click here to see answer by Cromlix(2315)

 Question 764191: Given that a function is reflected across the x-axis and we know the points(-2,4), (-3,8) and 2,-9) are on the curve what points must lie on the reflection? Click here to see answer by stanbon(60771)

 Question 764194: The equation of the line joining the points: (-1, 3), (4, -2). Click here to see answer by Cromlix(2315)

 Question 764830: The values in the table below belong to a linear function. x y 3 7 5 13 10 28 a) What is the slope of the graph of the function? b) What is the y-intercept? c) Draw the graph of the function. d) Write the equation of the function. e) Make up a situation that fits the function Click here to see answer by MathLover1(7480)

 Question 764853: Given the function f described by f(x)=-x-2, find f(-6). f(-6)=? Click here to see answer by reviewermath(721)

 Question 764988: F(x) =x^2+2x+4 ; g(x)=v(9-x) (When I do v() that is a square root symbol) Find each of the following if it exists: My question is (fg)(-7) (-7^2+(2)(-7)+4)(v(9-(-7)) (-49-14+4)(v(16)) (-59)(4) -236 I'm wondering if I figured this out correctly. The minus negative 7 in the square root is throwing me off I dont understand if i should add the 7 because there are two negatives or if I should subtract a negative 7 and also the negative 7 squared it throwing me off I'm confused about how I should count the negatives. Should I count it as -7^2 or (-7)^2? Thank you very much for your help. Click here to see answer by josgarithmetic(3309)
 Question 764988: F(x) =x^2+2x+4 ; g(x)=v(9-x) (When I do v() that is a square root symbol) Find each of the following if it exists: My question is (fg)(-7) (-7^2+(2)(-7)+4)(v(9-(-7)) (-49-14+4)(v(16)) (-59)(4) -236 I'm wondering if I figured this out correctly. The minus negative 7 in the square root is throwing me off I dont understand if i should add the 7 because there are two negatives or if I should subtract a negative 7 and also the negative 7 squared it throwing me off I'm confused about how I should count the negatives. Should I count it as -7^2 or (-7)^2? Thank you very much for your help. Click here to see answer by stanbon(60771)

 Question 764991: f g, f-g, fg and f/g. determine the domain for each function f(x) f(x)=3x+4, g(x)=x+3 (f+g)(x)= Click here to see answer by stanbon(60771)

 Question 765173: Find the value for the function. Find f(-x) when f(x)= x/x^2+9 Click here to see answer by stanbon(60771)

 Question 765186: Find the inverse of the given one to one function f(x) = (x-1)/(x+2) Give the domain and the range of f and of inverse Click here to see answer by stanbon(60771)

 Question 765182: Find a formula for the inverse f(x)= (x+5)^3 if the function is one to one Click here to see answer by josgarithmetic(3309)

 Question 765314: 1.Express the Quadratic Function in Standard Form. 2.Find it's Vertex and its x- and y- intercept(s). f(x)=2x^2+4x+3 Click here to see answer by lwsshak3(7677)

 Question 765437: given that (-7,-9) is on the graph of f(x), find the corresponding point for the function 2/3 f(x) Click here to see answer by tommyt3rd(3721)

 Question 765455: I need quick help with this question f(x)=4x f(f^-1(-6)) Click here to see answer by jim_thompson5910(29613)
 Question 765455: I need quick help with this question f(x)=4x f(f^-1(-6)) Click here to see answer by MathLover1(7480)

 Question 765563: f(1)=8,f(2)=-5,f(3)=1 I need to write the function as a ordered pair, giving the domain and range of f. I am not understanding the whole concept of functions. Click here to see answer by jim_thompson5910(29613)
 Question 765563: f(1)=8,f(2)=-5,f(3)=1 I need to write the function as a ordered pair, giving the domain and range of f. I am not understanding the whole concept of functions. Click here to see answer by josgarithmetic(3309)

 Question 765581: I need to determine if relation is function: Domain: each person in town Correspondence: each persons aunt Range: a set of females Is this relationship a function? How would you go about figuring it out? Click here to see answer by jim_thompson5910(29613)

 Question 765693: [question part "a"] write a rule using function notaion f(x)= ___ [question part "b"] then give a reason why its a function. 1a. choose any number, then divide it by 6. i wrote down f(x)= x/6 1b. im lost on the second part of the question 2a choose any number, multiply it by 3, then add15. i wrote down f(x)=3x+15 2b. im lost on the second part of the question Click here to see answer by rothauserc(643)

 Question 765724: describe the domain and range for the given relation in interval notation. question how am I supposed to know which point comes first on like a graph that does not have definite points on it? cant really put it into words without showing the example Click here to see answer by rothauserc(643)