# 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 79: Find the domain and range, (4x+5)^3 --------- 3x+1 Click here to see answer by ichudov(499)

 Question 210: given f(3)=7, find f-1(7). the negative one is the exponent. Click here to see answer by ichudov(499)

 Question 284: The regular price of a pair of jeans is x dollars. Let f(x) = x - 5 and g(x) = 0.6x. Find (f o g)(x) and describe what this models in terms of the price of jeans. Click here to see answer by whenindoubt(13)

 Question 1714: Think of a mathematical function that represents something from your own life. For example, suppose the number of beers you drink depends on the number of football games you watch. If you drink five beers every football game, the function would be Number of Beers (B) = 5 times Number of Football Games(F), or B=5F. Write a brief paper describing this function that comes from your own life. It could be something about the amount of money you spend, the number of hours you spend on the phone, etc... Click here to see answer by smartdude17(30)

 Question 1787: Sketch the graph of each function. state the domain and range, and whether the function is increasing or decreasing. identify any aysmptotes. f(x)=2^x-3 Click here to see answer by longjonsilver(2297)

 Question 1948: ***MUST SHOW WORK*** Variables x and y vary inversely. Use given values to write an equation realting x and y. Then find y when x=3 2. x=(3/5) y= (5/3) Click here to see answer by longjonsilver(2297)

 Question 1966: State whether the following function has a maximum value or minimum value and find it? f(x)=2+10x - x^2 ( to the power of 2:forget it) Click here to see answer by khwang(438)

 Question 2095: Given the function f(x)=3x^3-1, find f^(-1) f(x)=3x^3-1 find f^-1(x) Given the function f(x)=2x^2+1 and g(x)=x-4, find (fog)(x). Restated that is f(x)=2x^2+1 and g(x)=x-4 find (fog) (x) Solve the following x: log base 2(3x-5)=3log2 (3x-5)=3 Click here to see answer by longjonsilver(2297)

 Question 2243: 22. If f(x)=x^2 and g(x)=x+2, find f[g(x)] 23. If f(x)=x^3+4 and g(x)=x+3, find [g•f](2) 24. Find the inverse of the function f(x)=4x+1. 25. Which of the following pairs of functions are inverse functions? a. f(x)=3x-9, g(x)=-3x+9 b. f(x)=4-x, g(x)=4+x c. f(x)=x+5, g(x)=x-5 d. f(x)=x, g(x)= -x Click here to see answer by khwang(438)

 Question 2328: What is the difference between function and and equation ? What happens when we plot the graph of a function and an equation ? In what way both are different ? what is the same and different about gradient of a line and gradient of a curve ? Click here to see answer by longjonsilver(2297)

 Question 2291: If Y varies jointly as X and Z and Y=60 when X=10 and Z= -3, what is Y when X=8 and Z=15? Click here to see answer by matthew_sessoms(39)

 Question 2337: what is [fog](x) if f(x)= 2x +7 and g(x)= -3x+4. my list of possable answers is a.-6x-17 b.-6x+15 c.-6x+8 and d.-6x-10 Click here to see answer by longjonsilver(2297)

 Question 2380: How do I solve f(x)= 1/2x(to the third power) + 6x(to the second power)-9? Fractions always confuse me!! Click here to see answer by longjonsilver(2297)

 Question 2362: In Questions 1-, use the transformation T:(x,y) -> (x + 2,y -1) and S: (x,y) -> (2x,y). 1. Find T: (-1,4). 2. Find S:(3,5). 3. What is the preimage of (4,-1) under T? 4. Which is an isometry? A. T B. S C. both T and S D neither T nor S Click here to see answer by longjonsilver(2297)

 Question 2392: State the domain of r(x) and range of r(x) in the equation r(x)=(6x+12)/(x^2-16) Click here to see answer by longjonsilver(2297)

 Question 2394: For the following piecewise defined function find f(1) f(x) = {x^2+1,....x<0 {x-1,......X>0 Click here to see answer by longjonsilver(2297)

 Question 2401: I is the identity transformation 21. I o R =___?____ x The x is suppose to be R to the x lower case 22. T o T negative 1 = ____?__ Click here to see answer by longjonsilver(2297)

 Question 2486: True or False - The domain of x^2 + 2 is (-00;+00) and the range is (2;+00) Click here to see answer by matthew_sessoms(39)

 Question 2722: If f(x) = 3x - 1 , then the inverse function of f(x) is: Click here to see answer by longjonsilver(2297)

 Question 3461: The pages of a report are numbered consecutively from 1 to 10. If the sum of the page numbers up to and including page number x of the report is equal to one more than the sum of the page numbers following page number x, then x = (A) 4 (B) 5 (C) 6 (D) 7 (E) 8 Click here to see answer by drglass(89)

 Question 3460: If the tens digit x and the units digit y of a positive integer n are reversed, the resulting integer is 9 more than n. What is y in terms of x ? (A) 10 - x (B) 9 - x (C) x + 9 (D) x - 1 (E) x + 1 Click here to see answer by drglass(89)

 Question 3844: For each fuction as defined that is one-to-one, (a) write an equation for the inverse function in the form y=f^-1(x), (b) graph f and f^-1 on the same axes, and (c) give the domain and the range of f and f^-1. If the function is not one-to-one say so. y=3x-4 Click here to see answer by longjonsilver(2297)

 Question 3900: What is the slope of the line: x/3 - (- y/5) = 1 What is the domain for g(x) = (6 + x)(4 + x) What is the domain for f(x) = 2(x - 5)^2 - 8 What is the range for f(x) = 9 - 8x - x^2 Click here to see answer by longjonsilver(2297)

 Question 4109: evaluate the function for the indicated value: f(x)=x2+2x-7 find f(-4) Click here to see answer by Earlsdon(6287)

 Question 4203: Given , find the domain, the range, the axis of symmetry, and the y-intercept, and the x-intercept. (sketch the graph) Click here to see answer by ichudov(499)

 Question 4498: Let f(x)=x^2+x and g(x)=2x+1. Find and simplify the following: . a) (g o f)(x) . b) (f o g)(x) -- the o is colored in. . c) (f+g)(2) . d) (f-g)(3) Click here to see answer by pushpaharan(47)

 Question 4785: Joan Madden decided to pay 1/5 of the camp tuition for her grandson. Joan saved her daughter-in-law \$250. What was the total cost of the tuition? Click here to see answer by rapaljer(4667)

 Question 4784: John and Harvey sold widgets, Harvey sold 2½ times as many widgets as John. If the difference in their sales was 87 units. How many widgets did each of them sell? Click here to see answer by Abbey(339)

 Question 4783: Bob sold hammers and wrenches at a flea market. He sold 4 times as many hammers as wrenches. The total sales equaled \$609.00. If the hammers sold for \$3.00 apiece and the wrenches for \$2.50 each how many hammers and wrenches did he sell? Click here to see answer by wildcat1cheer(2)

 Question 6262: what is the evaluate of 3x(x-2) if x=6 Click here to see answer by xcentaur(357)

 Question 6582: i need help with like-terms. here is one of my problems...... (6v^5-5v)-5(7v^5-2v-7) Click here to see answer by ichudov(499)

 Question 6609: How do you find the inverse of (3/(x-1))? Click here to see answer by Mike(39)

 Question 6614: How do you simplify ((1-2i)/(3+i)) and write in a+bi form? Click here to see answer by prince_abubu(198)

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