# 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 618726: Find the domain of the function g(x) = 2/x-15 Click here to see answer by fcabanski(889)

 Question 618896: The function y = 16t2 + 486 models the height y in feet of a stone t seconds after it is dropped from the edge of a vertical cliff. How long will it take the stone to hit the ground? Round to the nearest hundredth of a second. Click here to see answer by nerdybill(7008)

 Question 618341: find the rate of growth of the function a(x) = 19(2.046)^x Click here to see answer by richard1234(5390)

 Question 619111: is there a way of determining the maximum subsets of a set? Click here to see answer by user_dude2008(1861)

 Question 619163: What is the solution of function g^2,g^3,g^4,g^5,g^6 and g^30? The question give : g(x)=(x-1)/(x+1). I had ask my teacher,he said g^4(x)=x g^8(x)=x g^12(x)=x g^16(x)=x g^20(x)=x g^28(x)=x g^2g^28(x)=? g^2(x)=-(1)/(x) and can you prove to me why my teacher say like above? Thank You.. Click here to see answer by Alan3354(31528)

 Question 619324: What is the domain of RAE (((a^2)+ 3a -28)/(2a + 14)) Click here to see answer by stanbon(57967)

 Question 619330: evalute the function at the given value of the independent variable and simplify g(x)=2x-4;g(x-1) Click here to see answer by stanbon(57967)

 Question 619332: give the domain and the range of the relation (-9,-7)(8,1)(9,7)(11,5) Click here to see answer by stanbon(57967)

 Question 619701: Suppose we are given two functions, say r(x) and s(x). a) Is it true that r(x) + s(x) = s(x) + r(x) for all values of x? Why or why not? b) Is it true that r(x) �� s(x) = s(x) �� r(x) for all values of x? Why or why not? c) Is it true that r(0) = 0? Why or why not? 1 Click here to see answer by richard1234(5390)

 Question 619821: What is the value of f(3) for the function f(x) = 8x – 5? Click here to see answer by ewatrrr(10682)

 Question 620346: A car travels at a constant speed of 60 km/h for hours, stops for half an hour and then travels for another 2 hours at a constant speed of 80 km/h, reaching its destination. Construct a function that describes the distance travelled by the car, d (km), at time, t hours Click here to see answer by lwsshak3(6761)

 Question 620518: Find the domain of the composite function. f(x)=square root of x ; g(x)=2x-5 Please help me with the above question for I have no idea on how to go about it. Thank you!! Click here to see answer by ewatrrr(10682)

 Question 620668: If f(x) = 2x + 1 and g(x) = 3x - 4, find f[g(3)]. Click here to see answer by nerdybill(7008)

 Question 620708: Given the following piecewise function f(x)=[2x+4 for x<-3, -1 for -3<=x<=4, -x for x>4] find the domain. Find the range. Find the intercepts. Is f continuous on its domain? If not, state where f discontinues. Graph the function. Please show all work. Click here to see answer by lynnlo(4169)

 Question 621017: List the domain for the function f(x) = x2 - 4 Question options: {x | x is a real number} {x | x > 0} {y | y > -4} {y | y is a real number} Click here to see answer by jim_thompson5910(28715)

 Question 621018: Evaluate the function f(x) = x3 - 4x2 + 3x - 7 for x =-2 Evaluate the function g(x) = x2 - 5x + 2 for x =-1 List the range for the function {(-2,3), (-1,5), (0,7), (1,9)}. Question options: {-2,-1,0,1,3,5,7,9} {-2,-1,0,1} {3,5,7,9} {1,3,5,7,9} Click here to see answer by solver91311(17077)

 Question 621482: 4. Consider the following formula: a = 1/2 b - 4 Which of the following statements is true for this formula?  A. When the value of b is less than 8, a is negative.  B. When the value of b is greater than 8, a is negative.  C. When the value of b is less than 8, a is positive.  D. When the value of b is greater than 4, a is positive. This is a sample question Im preparing for a test & I need the answer to be explained to me so that I.will be able to answer similar problems like this. Click here to see answer by fcabanski(889)

 Question 621374: what is the Domain and Range of F(x) = X^2-4 Click here to see answer by KMST(1936)

 Question 621582: I need help with Domain and Funcitons, I'm not particularly sure how to deal with this specific problem! https://docs.google.com/viewer?attid=0.1&pid=gmail&thid=137f808a0f70571d&url=https%3A%2F%2Fmail.google.com%2Fmail%2F%3Fui%3D2%26ik%3D3cdd276e34%26view%3Datt%26th%3D137f808a0f70571d%26attid%3D0.1%26disp%3Dsafe%26zw&docid=f1772cd3a5e316080c2476bacb3d335d%7C42640b2ee7d20ce141c6ec84526e5611&a=bi&pagenumber=1&w=1049 This is a homework question for my college algebra class. I really have no idea how to work this out! I'm not sure how to do functions like this an I dont even recognize the Xe! Click here to see answer by math-vortex(472)

 Question 622160: relation of (0,-1) (1,3) (2,7) (3,11) (4,15) (5,19) Click here to see answer by lynnlo(4169)

 Question 622355: I have to solve this algebraically, not by using a graph: A parabola has a vertex (8, 3) and one x intercept of 5. Determine the coordinates of the other x- intercept. Click here to see answer by ewatrrr(10682)

 Question 622664: Please help me with this I need this tomorrow. For each of the following relations, indicate which relations are also functions. 1. {(2,5),(3,6),(4,7),(5,8)} 2. {(1,1),(2,8),(3,27),(4,64)} 3. {(1,4),(2,4),(3,5),(4,5)} 4. {(0,1),(0,2),(3,3),(3,4)} 5. {(a,6),(b,6),(c,6),(d,6)} 6. {(a,2),(a,4),(a,6),(a,8)} Express each statement, using function notation. 13. How much do 3 kilograms of chicken cost, if it sells for Php 95/kilogram? 14. y is 500 when x=25 15. Find the value of y that corresponds to the value of x=12. Let f(x)=3x-1 and g(x)=2x squared-4x+3. Evaluate the following: 16. f(6) 17. f(-5) 1 18. f(-) 3 19. g(5) 20. g(-1) 21. g(0) 1 22. g(-) 2 23. f(a-1) 24. g(a-1) 1 Let f(x)=3x squared and g(x)=-x squared-2. Evaluate the following: 2 25. f(0) 26. f(-2) 2 27. f(-) 3 28. g(-1) 29. g(4) 1 30. g(-) 2 31. f(5a) 32. g(2a) 33. f(a+2) Note numbers 7-12 are not part of my assignment. Many Thanks! Click here to see answer by lynnlo(4169)

 Question 622810: I am just super lost with this one. Given the function f(x)=(x^2-8)/(x-3), if x=-2, what is f(x)? What point is on the graph of f? i got -12/5;(-2,-12/5) Click here to see answer by ewatrrr(10682)

 Question 622710: Find the domain of the composite function f g. f(x)=√x;g(x)=4x=12 A) {x|x≤-3 or x≥0} B) {x|x≥-3} C) {x|x≥0} D) {x|x is any real number} could someone please assist me with this I have no clue Click here to see answer by KMST(1936)

 Question 623398: Part V: Logarithms One important application of logarithms is found in various computer search routines. For example, a binary search algorithm on a table (or array) of data takes a maximum of log2n (“log base 2, of n”) steps to complete, where n is the number of data elements that can be searched. How many steps (at most) are needed for a search of a table with 16 elements? 512 elements? Explain. The approximation of the natural logarithm of 2: ln 2 ≈ 0.693 is commonly used by applied scientists, biologists, chemists, and computer scientists. For example, chemists use it to compute the half-life of decaying substances. Based on this approximation and the power rule for logarithmic expressions, how could you approximate ln 8, without a calculator? Explain. Click here to see answer by Earlsdon(6294)

 Question 623428: if f(x)-2/3x+5, determine a formula for f^-1(x). draw the graph of each function on one set of axes? Click here to see answer by ankor@dixie-net.com(15746)

 Question 623560: Find the value of x in the domain of f(x) = 6 − 4x for which f(x) = 8. x = ? Click here to see answer by Theo(3504)

 Question 623557: Given T(x) = 9, find the following. (a) T(−3) = ? (b) T(0) = ? (c) T(2/7) = ? (d) T(3) + T(1) = ? (e) T(x + h) = ? (f) T(3k + 5) = ? Click here to see answer by nerdybill(7008)