# 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

## Tutors Answer Your Questions about Functions (FREE)

 Question 144999: Determine the domain of f in f(x)=10- the square root of 3-x Click here to see answer by shahid(44)

 Question 145000: PLEASE HELP If the graph of f contains the points ( -1, 3), ( 0, 4) and ( 2, -7) list the points that would be found on the graphs of each of the following functions: a) f (x – 3) b) f (x) + 3 Thank You Click here to see answer by stanbon(57361)
 Question 145000: PLEASE HELP If the graph of f contains the points ( -1, 3), ( 0, 4) and ( 2, -7) list the points that would be found on the graphs of each of the following functions: a) f (x – 3) b) f (x) + 3 Thank You Click here to see answer by shahid(44)

 Question 145020: PLEASEEE 1. Find functions f and g so that f [g(x)] = H(x) where H(x)=(1+x^2)^3 2. If g(x)=x^2+4x+2 find g(2) and g(x+2) 3. For f(x)=4x+1 and g(x)=x^2-2x-4 find (g-f)(x). Simplify the answer. 4.What is the function which would intersect the y-axis 2 positions up(vertical) from the function f(x)=x^2 5. Using the graphing utility to approximate any relative minimum or maximum points of f(x)=x^2-6x. THANK YOU VERY MUCH Click here to see answer by stanbon(57361)

 Question 145283: (4,10)(2,8)(4,-7) Click here to see answer by Alan3354(30993)

 Question 145442: find a formula for the inverse of the function if it exists f(x)=x/x-1 Thank you tutors Click here to see answer by stanbon(57361)

 Question 145434: How would I find the domain and range of C(g) if C= 3.03 I'm confused about how to cube a number and find the domain and range between the first and second set of coordinates. I have tried to use the y= mx+b but I just don't get it. Click here to see answer by stanbon(57361)

 Question 145432: Find the domain and write in interval notation f(x)= 2x+1/3x+5 it looks like a fraction: f(x)= 2x+1 "over" 3x+5 I have an answer sheet but it doesn't help because I don't understand how to work the problem to find the answer...any help would be greatly appreciated! Click here to see answer by stanbon(57361)

 Question 145376: Need help with this question. Find the domain and range of the reation R= {(x,y)| y<= 2x, x and y positive integers less than 6}. Click here to see answer by stanbon(57361)

 Question 145532: i need to find the x-intercept, y-intercept, axis of symmetry, and vertex of these two problems and don't know how to find any of those 1. f(x)=x^2-6x+8 2. f(x)=-x^2+10x-16 Please help me! Click here to see answer by edjones(7569)

 Question 145531: i need to find the x-intercept, y-intercept, axis of symmetry, and vertex of these two problems and don't know how to find any of those 1. f(x)=x^2-6x+8 2. f(x)=-x^2+10x-16 Please help me! Click here to see answer by ankor@dixie-net.com(15653)
 Question 145531: i need to find the x-intercept, y-intercept, axis of symmetry, and vertex of these two problems and don't know how to find any of those 1. f(x)=x^2-6x+8 2. f(x)=-x^2+10x-16 Please help me! Click here to see answer by solver91311(16897)

 Question 145375: Please help me solve this question. Which of the following relations is (are) functions? a. {(x,y)| y^2=2x+1} b. {(x,y)| y=2x^2+1} c. {(2,3), (3,3), (4,3)} Click here to see answer by solver91311(16897)
 Question 145375: Please help me solve this question. Which of the following relations is (are) functions? a. {(x,y)| y^2=2x+1} b. {(x,y)| y=2x^2+1} c. {(2,3), (3,3), (4,3)} Click here to see answer by stanbon(57361)

 Question 145639: the key in the back says the answer is 48, but i do not understand how they got there... f(n)= 5n(squared)+4n f(3)-9 Click here to see answer by ankor@dixie-net.com(15653)

 Question 145692: what is the midpoint of line segment with (6,8)(12,16) given as the endpoints? How do you find it? Click here to see answer by jim_thompson5910(28595)

 Question 145723: I NEED HELP! This problem is not coming out right. Here it goes... Given the function k describe by k(x)=10x find each of the following: (a) k(-17) (b) k(8) (c) k(34) the answer k(-17) = ????? PLEASE.....PLEASE.... Click here to see answer by rapaljer(4667)

 Question 145768: In a triangle, one angle is three times the measure of the second angle. The third angle is twice the measure of the second angle. What is the measure of each angle? i do not understand this. Click here to see answer by stanbon(57361)

 Question 145766: In an isosceles triangle,the two equal angles are 60%greater than the thirdangle What is the measure of each angle? When I tries to answer it side that every side of this triangle is the same I am confu sed. trice.beverly@mccg.org Click here to see answer by stanbon(57361)

 Question 145855: I have to graph the following functions: f(x)= -3x +7 f(x)= -3x (squared) + x - 5 This is what I have thus far. Can someone help me? f(x) - -3x + 7 y = -3x + 7 -3x + 7-7 = 0-7 -3x/3 = -7/3 or -2 1/3 **I don't know where to go from here..... Click here to see answer by stanbon(57361)

 Question 145897: how do you find the domain and the range for the following problem (-1,7), (0,6), (-2,2) (5,6) Click here to see answer by helen hatcher(1)

 Question 145902: find the equation of the line containing the given pair (-5,-3) (-2,-4). I came up with: y=1/3x-4/3 but the systems says that it is not correct. Please help! Thank you Click here to see answer by scott8148(6628)

 Question 145903: Graph the linear function of f(x)=-2 Click here to see answer by jim_thompson5910(28595)

 Question 145934: Algebra 2A-unit1- Functions Copyright California pass program practice 1-8-1 solve. you must use a function. The number of sodas purchased is N(x)=24x, where x is the number of cases of sodas. If five cases are purchased and three cans are sold, how many are left? the answer to this is 115 cases, which i cant seem to figure out. Click here to see answer by edjones(7569)

 Question 146406: My daughter gave an answer to a problem as follows: 1/4 x + Y = 2 1/2 The prof. told her she has to convert it all to numbers Help? Click here to see answer by Earlsdon(6287)

 Question 146416: Determine the domain f(x) = 9-8x-x^2 Click here to see answer by jim_thompson5910(28595)

 Question 146419: 1. Find domain of the function: g (x) = 5 -2x 2. Write an equation in standard form of the line that contains (5,0) and is perpendicular to the line y= -3x + 7 3. Given the following function, h(x) = 2x squared, find h(-1), h(0) and h(4). I have gone over these so much that I am no longer sure of muyself or the answers! I really appreciate your help. Thank you, Jody Click here to see answer by Fombitz(13828)

 Question 146510: how to simplify this eqaution? (-7x3) (20x9) Click here to see answer by jim_thompson5910(28595)

 Question 146517: (5x)0+5x0 Click here to see answer by checkley77(12569)

 Question 146503: sketcgh the graph of the function and determine whether the function is even, odd, or neither h(x)=x^2-4 Click here to see answer by edjones(7569)

 Question 146484: What is the domain of the composite function f(g(x)) where and . Please write domain in interval notation. Thanks. Click here to see answer by stanbon(57361)

 Question 146614: The book gives an example of a function for X that substituts 1/2 for X in the expression.... f(1/2)=(1/2)^3 - 3(1/2)^2 + (1/2) + 5 =1/8 - 3(1/4) + 1/2 + 5 =1/8 - 3/4 + 1/2 +5 =1/8 - 6/8 +4/8 + 40/8 = 39/8 Now im sure this is just simple addition and subtraction with fractions, but I haven't worked with math in many years. Can someone break down f(X) = 2X^3 - X^2 + 3X - 2 with f(-1/2) substuting for X please, the more info the better. Click here to see answer by Fombitz(13828)

 Question 146615: Given f(x) = -X - 5 find f(a - 1) how would you work this problem when X is substituted with another letter rather then a number? Click here to see answer by jim_thompson5910(28595)

 Question 138512: g(x)= 5^x (x is the expontent) Click here to see answer by Alan3354(30993)

 Question 146663: find the second coordinates of the points with first coordinates 0 and 1 of the following function f(x)=3(4) Click here to see answer by Alan3354(30993)

 Question 146662: help me find the domain of each function. f(x)=1/3x help please Click here to see answer by nerdybill(6960)

 Question 146676: how do I solve p(x)=x^2-2x+3 Click here to see answer by stanbon(57361)

 Question 146648: I NEED EXPLANATION IN A COUPLE OF MATH PROBLEMS they are all odd the answers are in the back of the book but i want to know how to do them can someone EXPLAIN HOW TO SOLVE THEM SO I CAN BE READY FOR AN UPCOMING EXAM.i will greatly appreciated.... Directions: Use the function to evaluate the indicated expressions and simplify. 27) f(x)= x + 4 ; f(x^2), (f(x))^2 Directions: Find the domain of the function 37) f(x) = 2x 41) f(x) = (1)/(x-3) 43) f(x)= (x+2)/(x^2-1) 45) f(x)= f(x)= squareroot of (x-5) Click here to see answer by oscargut(891)

 Question 146739: what is the answer in f(-x)=3/x+2 Click here to see answer by nabla(475)

 Question 146786: How would you solve a question such as Determine the domain f(x)= 10/2x^2 - 12 I have tried to solve a similiar equation by factoring the denominator but not sure what to do after that. Click here to see answer by jim_thompson5910(28595)

 Question 146847: Let f(x)=√(x+3 (sqrt(x+3) )and g (x)=x^2 )-1.Find fog and gof. Click here to see answer by Fombitz(13828)

 Question 146957: Hello I'm having a problem with one of my question on operations on functions. I will greatly appreciated if you help me out. The question is, "Find (f+g)(x), (f*g)(x), (f-g)(x), and (f/g)(x) for f(x)=8x^2 and g(x)=1/x^2. The exponent 2 on the value x is confusing me and I don't know what to do. Thank you. Click here to see answer by Fombitz(13828)

 Question 146993: Does anyone know how to: Find the inverse of the function,f(x)=√(7&x ) (seventh root of x). Thanks Click here to see answer by Fombitz(13828)

 Question 147052: f(x)=(x-8)^(1/2) Click here to see answer by Fombitz(13828)

 Question 147081: Find c.(f+g)(3) 14. f(x)=-7+9;g(x)=2x-1 Click here to see answer by 983manoj@gmail.com(4)

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