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

Tutors Answer Your Questions about Functions (FREE)

Question 7091: What is Function notation? what is it used for?
Click here to see answer by prince_abubu(198)

Question 7123: What is a supplementary?
Click here to see answer by Earlsdon(6287)

Question 7092: Determine whether each relation is a funtion, justify your answer.
{(0,1), (1,0), (2,1), (3,1), (4,2)}
HOw do i solve this problem?
Click here to see answer by glabow(165)

Question 7092: Determine whether each relation is a funtion, justify your answer.
{(0,1), (1,0), (2,1), (3,1), (4,2)}
HOw do i solve this problem?
Click here to see answer by drglass(89)

Question 7083: a+(b+2)=
Click here to see answer by glabow(165)

Question 7139: The Ajax Company can sell gidgets for $10.97 a piece. What does it cost the company to manufacture each gidget if it makes a profit of 8%.
The answer that my book has, I am not getting.
I tried doing a proportion
Yet, that is not the answer
I multiplied $10.97 x 8% and I still subtract that from $10.97 and I did not get the answer. Please help me. I am frustrated.
Click here to see answer by prince_abubu(198)

Question 7140: A store advertises an air conditioner on sale for $280. If this is marked down 20%, what was the original price.
Again I tried to use a proportion or multiply 20% x 280 and I do not get the answer in my book. Please help me.
Click here to see answer by Earlsdon(6287)

Question 7134: Hello, My question is about relations and functions. On my homework, it says, "For each set of points, identify the domain, the range, and tell whether it is a function or not." One of the problems is {(2,3),(3,7),(5,-1),(0,0)}. How do i know whether it is a function or not?
Many thanks,
Sarah
Please email me at sayray4209@yahoo.com
Click here to see answer by glabow(165)

Question 7278: the sum of two numbers is 4, and their difference is 24. find the numbers.
Click here to see answer by bonster(299)

Question 7475: If what is in terms of f(x)?
Click here to see answer by ichudov(499)

Question 7615: please help me in this question......

2.8*10^4+3.2*10^5

Click here to see answer by longjonsilver(2297)

Question 7696: can you factor x squared - x - 20 ? Thank you. Amanda
Click here to see answer by drglass(89)

Question 7841: How do you solve functions? for exampl:f(x)=3x+2
and f(x)=x/x-1
Click here to see answer by prince_abubu(198)

Question 7564: what is domain in algebra?
Click here to see answer by pvrbrahmam(12)

Question 8040: 2.8 x 10 to the 23rd(power) is what percent of 5.6 x 10 to the 24th(power)?
this is my daughters first day of algebra. Last year her National test scores came back high so they put her is the class. She never had pre-algebra and she doesn't have a text book yet. What is the formula? Please help....
Click here to see answer by bonster(299)

Question 8138: write a function rule for:
f(x)=3x2+2,g(x)=2x
please show work.
Click here to see answer by prince_abubu(198)

Question 8520: The worksheet says:
Use substitution to solve each system of equations. If the system does not have exactly one solution, state whether it has no solution or infinitely many solutions.
The problem:
3x-y=4
2x-3y=-9
Click here to see answer by prince_abubu(198)

Question 8640: I'm sorry. I left out the 7.
2/x + 1/2x = 7 ?
Click here to see answer by rapaljer(4667)

Question 9106: my problem is g(x)=sq. rt. of x -1. i have four numbers for x and they are 0,1,4,9. i dont know how to solve because of the square root. i can do these kinds of problems without square roots, but that is really throwing me off. so just explain what to do with that and i can finish it. thanks
Click here to see answer by longjonsilver(2297)

Question 9152: Identify all rational zeros of the polynomial function f(x)= x^3+4x^2-2x-15
Click here to see answer by mathmaven53(29)

Question 9164: evaluate:
c^5 when c=3
Click here to see answer by bonster(299)

Question 9261: I AM TRYING TO HELP MY DAUGHTER ON HER MATH. IS THERE ANYTHING I CAN GET OFF
OF HERE TO SHOW EXAMPLE FOR HER? THANK YOU
Click here to see answer by rapaljer(4667)

Question 9298: what is a vairable
Click here to see answer by Volleyball_luver23(4)

Question 9338: what is the domain and range of this relation: (1,2)(3,10)(-2,20)(3,11)
Click here to see answer by rapaljer(4667)

Question 9342: Please show me how to solve this problem
find f(-3) if f(x)= 2x-1
Click here to see answer by rapaljer(4667)

Question 9310: I don't understand these problems. How do you solve this?
f(x)=10x+1
Click here to see answer by rapaljer(4667)

Question 9396: I WANT TO KNOW IF YOU HAVE PRACTICE QUIZZES FOR MATH 1000 ON LINE AND PRACTICE EXAMS ONLINE THAT WILL HELP ME FOR MY EXAM
AND A COMPREHENSIVE ONE OF ALL THE EXAMS LIKE A CUMALITIVE FINAL AND MIDTERM

Click here to see answer by rapaljer(4667)

Question 9296: tell if the interval is open,closed,or neither 9>s>-7
Click here to see answer by rapaljer(4667)

Question 9535: I was wondering how to find all zeros of the function....
h(x)=x^3-3x^2+4x-2....I could only get x=1

f(x)=x^4-10x^2+24......I got x=-2 but i can't get the other answers

THANKS SO MUCH!!!
Click here to see answer by mathmaven53(29)

Question 9707: how do u do this problem y=2x+5 u have to make a input output box and i dont know how to do it. i have to get this done tonight can u please please show me?

Click here to see answer by jennifer(9)

Question 9706: I do not understand how to do any of this. can u try and teach me or at least show me?
Click here to see answer by jennifer(9)

Question 9784: 5y/4-y/2=-3/4
Click here to see answer by DWL(56)

Question 9870: Describe the domain and range of the function.
Input 0 2 4 6 8 10
Output 7 10 12 15 17 21
Click here to see answer by rapaljer(4667)

Question 10077: what is the answer for (x^2+1)^2

Click here to see answer by Earlsdon(6287)

Question 10079: what is 275+52+8=
Click here to see answer by thecampusnerd(13)

Question 10236: negative 2x divded 3 less than or equal to 6.
Click here to see answer by askmemath(368)

Question 10738: x + 6 for x = 7
Click here to see answer by askmemath(368)

Question 10738: x + 6 for x = 7
Click here to see answer by bubbles8023(1)

Question 10841: what 2 numbers added equal 7 but when multiplied equal 8
Click here to see answer by Rta 14(3)

Question 11166: hello, my name is shavon and i was on this site because i need help with algebra. It is called patterns and linear functions see i dont get it becaus the tile is called finding the 10th term here is an example.

term numbers 1, 2, 3, 4, ... 10 ...
sequence 3, 5, 7, 9,... empty box ...
so do you thonk you can help me
Click here to see answer by longjonsilver(2297)

Question 11270: need help with the equation -5r - 6 +4r = -r +2
solve for r.
Click here to see answer by roxy9229(32)

Question 11270: need help with the equation -5r - 6 +4r = -r +2
solve for r.
Click here to see answer by longjonsilver(2297)

Question 11385: how do u do the binary operations!?
we had a test on it today and i think i failed because i got really confused on how todo it.....
Click here to see answer by kyle491(5)

Question 11815: Please help me try and understand how to do this problem. I am not sure how to go about it. My book gives horrible examples.
Given: f(x) = -2/3 x + 15
x when f(x) = 26
Click here to see answer by longjonsilver(2297)

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