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

Algebra ->  Algebra  -> Functions -> Questions on Algebra: Functions, Domain, NOT graphing answered by real tutors!      Log On

 Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help! Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

 Algebra: Functions, Domain, NOT graphing Solvers Lessons Answers archive Quiz In Depth

 Question 423655: Does the following quadratic have a graph that opens up or opens down? f(x) = -3x2 + 5x - 7 Click here to see answer by Alan3354(30993)

 Question 423656: What is the vertex of the equation f(x) = 2(x-4)2+5 Click here to see answer by Alan3354(30993)

 Question 423688: What would be the vertex of the following: f(x)=x^2+10x+9 Click here to see answer by Alan3354(30993)

 Question 423733: Is the following statement true or false? The verticle line test says that a graph is a function if no verticle line crosses the graph at more than one point. Click here to see answer by jim_thompson5910(28545)

 Question 423913: what is the greatest number that you can fill in here 3x- <20 Click here to see answer by MathLover1(6625)

 Question 424011: A little help please?... Given the function: f(x)=-2x^2+8x+1 Find the value of f(-3) Thank you in advance!! :) Click here to see answer by robertb(4012)

 Question 424112: What would the axis of symmetry be in the following function?... h(x)=-4(x+6)^2+7 Thank you in advance!! :) Click here to see answer by Gersid(33)

 Question 424266: I home school, I need to be able to explain this equation to student. I am lost, book is somewhat brief on procedure. Please help! thank you in advance For the function f(x)=x^2-2x+1, (a)find f(1) (b) solve f(x)=0 Graph the function y=f(x)=x^2+1 Thank you for your help regarding this problem Click here to see answer by AnlytcPhil(1276)

 Question 424449: Find the domain of the function. f(x)=-x+7 type the answer in interval notation Click here to see answer by stanbon(57290)

 Question 424450: Find the domain of the function. f(x)=sqrt(7x-35) type answer in interval notation Click here to see answer by nerdybill(6958)

 Question 424675: what is the domain and range of the function y=5x-2? Click here to see answer by MathLover1(6625)

 Question 424839: How do you write a function rule to describe the amount of sales tax as a function of the price of an item purchased if the sales taxis 6%? Click here to see answer by JoeFourier(1)

 Question 425119: michael found 36 coins. 1/4 of them were pennies, 1/3 of them were nickles,1/6 of them were quarters, and the rest were dimes. tell how many of each coin micheal found. ____ pennies ____ nickles ____quarters ____dimes 2. explain how you found the number of quarters? 3. how much are the coins worth all together ? Click here to see answer by stanbon(57290)

 Question 425321: How do i simplify the expression; -7xy^2/28x^5y? Click here to see answer by stanbon(57290)

 Question 425205: find the indicated outputs for these functions. h(x)=19 find h(4), h(-6), and h(12) Click here to see answer by richard1234(5390)

 Question 424902: f(x)=3(0.5)^x what is the domain of f(x): what is the range of f(x); find an intercept of f(x); Click here to see answer by jsmallt9(3296)

 Question 425503: I have a hard time with word problems, and would like some detailed explanation of how to solve this. Thanks, Sue You pay a certain long distance rate that depends on your number of minutes talked. If you talk from 0 to 700 minutes, you pay 20 cents a minute. If you talk 701 to 1500 minutes, you pay 12 cents a minute. If you talk anything over 1500 minutes, you pay 8 cents a minute. a. Is the number of minutes you talk a function of your long distance rate? b. Is your long distance rate a function of the number of minutes you talk? Click here to see answer by josmiceli(9668)

 Question 425516: if there a function g that satifies f o g = g o f = f for all funtions? If so, what is it? Click here to see answer by richard1234(5390)

 Question 425942: Hi, Im having trouble coming up with an equation for this problem. Can someone help. You pay a certain long distance rate that depends on your number of minutes talked. If you talk from 1 to 700 minutes, you pay 20 cents a minute. If you talk 701 to 1500 minutes, you pay 12 cents a minute. If you talk anything over 1500 minutes, you pay 8 cents a minute. a. Is the number of minutes you talk a function of your long distance rate? b. Is your long distance rate a function of the number of minutes you talk? Click here to see answer by Theo(3458)

 Question 425967: Determine the value(s) of the variable that must be excluded from the domain. x + 8 _____ x - 4 Click here to see answer by nerdybill(6958)

 Question 426404: find the domain of each of the following functions f(x)=√x + 6 f(x)=1/√(x + 6) Click here to see answer by edjones(7569)

 Question 426462: Why can't I get even the simplest concepts in algebra? I don't think i'm stupid because I do well in every other subject including geometry. Is algebra some kind of a subliminal filter used to keep most people out of engineering jobs? Click here to see answer by richard1234(5390)

 Question 426628: A block of ice loses one third of its weight every hour. After 2 hours, the block weighs 40 pounds. How much did the block weigh to begin with? Question 25 answers Click here to see answer by ewatrrr(10682)

 Question 426826: for the function f(x)=2x-1/x+1 what are the horizontal asymptote, vertical asymptote, and zeros Click here to see answer by stanbon(57290)

 Question 426825: for the function f(x)=-ln(x+2) if x = -1.9,-1,1,5? Click here to see answer by Alan3354(30993)

 Question 426936: A little help please!? Which of the following points will minimize the objective function z = 4x + 3y? Choose one answer. a. (1, 1) b. (2, 4) c. (5, 2) Click here to see answer by edjones(7569)

 Question 426933: A little help please?! One of the following points, (1, 1) (5, 2) (2, 4) maximizes the objective function z = -2x +5y, what is the maximum value of z? Thank you! Click here to see answer by Alan3354(30993)

 Question 426932: Provide an example of at least five ordered pairs that do not model a function. The domain will be any five integers between 0 and 20. The range will be any five integers between -10 and 10. Why does your example not model a function? Click here to see answer by richard1234(5390)

 Question 427087: if x=5,what is the value of 18x+23 Click here to see answer by Alan3354(30993)

 Question 427272: What are the domain and the range of each relation? Is the relation a function? C = {(1/2,5),( -3,7),(3/2,5),(1/2,-1)} E = {(40, 10), (-18, 27), (38, 10), (57, -15)} Click here to see answer by robertb(4012)
 Question 427272: What are the domain and the range of each relation? Is the relation a function? C = {(1/2,5),( -3,7),(3/2,5),(1/2,-1)} E = {(40, 10), (-18, 27), (38, 10), (57, -15)} Click here to see answer by kenisha12(1)

 Question 427904: If i'm given g(1)=5 g(5)=17 what formula should I use to figure out g(-3) Click here to see answer by Alan3354(30993)

 Question 427986: I need help with functions I dont really understand. the question is asking,for each function find f(-2),f(-1/2),f(3),and f(7) 1.f(x)=5x+2 Click here to see answer by richard1234(5390)

 Question 428031: QUESTION: Given the following inputs and corresponding outputs, is the relation a function? Justify your reasoning. Inputs: {1, 1, 2, 3} Outputs: {3, -3, 4, 4} Click here to see answer by Theo(3458)

 Question 428246: Which describes the solution set for: abs(x+2)>10 Click here to see answer by John10(245)

 Question 428248: Write an equation for the line that has a slope 3/4 and passes through (-8,1) Click here to see answer by John10(245)

 Question 428892: Good day, I am doing functions, and i'm trying to get the grasp of how to solve these problems but, i just can't get it. The problem that I have is f(x)= x^2+1 and g(x)=x-2. Determine the following: 1. I tried solving the following using this method step 1. f(x)=(x^2+1)-x-2(3) step 2. f(x)= x^2+1-x-6 step 3. f(x)= x^2-5-x step 4. x^2-x-5 I just cant quite get it. Thanks in advance! Click here to see answer by solver91311(16877)

 Question 429592: X-4/x^2+5x-36 Click here to see answer by ewatrrr(10682)

 Question 429687: Find the domain of the given function. Express the domain in interval notation R(x)= 64/x^2-64 Click here to see answer by ewatrrr(10682)

 Question 429355: How do you solve 9y squared - 64 =0 Click here to see answer by Alan3354(30993)

 Question 429773: How do I find out what the Vertical Asymptote is for this function: 2x^2-6/x^3-8? Click here to see answer by stanbon(57290)
 Question 429773: How do I find out what the Vertical Asymptote is for this function: 2x^2-6/x^3-8? Click here to see answer by richard1234(5390)

 Question 429903: f(x)=sin(x°) G(x)=2x a. Find expressions for (i) f(g(x)) (ii) g(f(x)). b. Solve 2f(g(x))=g(f(x)) for 0≤x≤360 I got f(g(x))= sin2x° and g(f(x))=2sinx I am unsure if these are correct and I am stuck on part b. Any help would be greatly appreciated. Andrew. Click here to see answer by Alan3354(30993)

 Question 430056: given the function h described by h(x)=7x find h(-17) Click here to see answer by richard1234(5390)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550