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

Tutors Answer Your Questions about Functions (FREE)

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(75887)

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(8007)

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(22740)

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(24713)

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(22740)

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(35256)

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(4671)

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(75887)

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(75887)

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(75887)

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(35256)

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(8007)

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(6294)

Question 146416: Determine the domain
f(x) = 9-8x-x^2
Click here to see answer by jim_thompson5910(35256)

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(32388)

Question 146510: how to simplify this eqaution?
(-7x3) (20x9)
Click here to see answer by jim_thompson5910(35256)

Question 146517: (5x)0+5x0
Click here to see answer by checkley77(12844)

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(8007)

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(75887)

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(32388)

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(35256)

Question 138512: g(x)= 5^x (x is the expontent)
Click here to see answer by Alan3354(69443)

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(69443)

Question 146662: help me find the domain of each function.
f(x)=1/3x
help please
Click here to see answer by nerdybill(7384)

Question 146676: how do I solve p(x)=x^2-2x+3
Click here to see answer by stanbon(75887)

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(2103)

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(35256)

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(32388)

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(32388)

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(32388)

Question 147052: f(x)=(x-8)^(1/2)
Click here to see answer by Fombitz(32388)

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)

Question 147155: I had to sketch the graph of and I've done that and I understand everything from domain, range, axis of symmetry, x and y intercepts, minimum/maximum values and continuous. But I don't really get what the problem is asking for when it say increases and decreases. It is not clear to me. Please help.
Click here to see answer by nabla(475)

Question 147158: I need to solve this help solving these two problems, I am stuck I came up with x=2 for the first and (-3,1) for the second can you please help.
1. If , find f(-1). I know this is not an equation just simplify.
2. State the domain of f(x)=(x+3)/(x-1)
I would greatly appreciate all the help I can get on these two. I am in College Algebra the text is College Algebra mac2105, Keiser University
Thank you
Teri
Click here to see answer by nerdybill(7384)

Question 147095: Which set of ordered pairs represent functions from A and B? Explain answer
A={0,1,2,3} and B={-2,-1,0,1,2}
(a) {(0,1),(1,-2),(2,)),(3,2)}
(b) {(O,-1),(2,2),(1,-2),(3,)),(1,1)}
Thank you
Click here to see answer by oscargut(2103)

Question 146892:
Please help
Let f(x)= [x-4] and g (x) = x + 2. Find f o g and g o f
Thank you
Click here to see answer by psbhowmick(878)

Question 147282: 1.)Given the function k described by k(x)=x+18 find the following: k(0)=?
2.)Given the function h described by h(x)=5x, find the following:
h(-16)
h(15)
h(30)
3.)Find the indicated outputs for f(x)=3x^2-3x
f(0)=?
4.)The function H described by H(x)=2.75x+71.48 can be used to predict the height, in centimeters, of a woman whose humerus (the bone from the elbow to the shoulder) is x cm long.
Predict the height of a woman whose humerus is cm long.
5.) The function, p(d)=1+ d/33, gives the pressure, in atmospheres (atm), at a depth d in the sea (d is in feet). Note that p(0)=1 atm, p(33)=2, and so on. Find the pressure at 110 feet is ?atm
6.) Graph the function: f(x)=-6x
7.) Find the domain of the function: g(x)- 8/8-9x
8.) Find the domain: p(x)=2x-7
9.) Find the domain of the function: g(x)=4/7-5x
10.)Find the domain of the function: g(x)=9/2-5x
11.) Find the domain: f(x)=7/|2x-3|
12.) Find the domain: f(x)=3/ |5x-5|
13.) Find the domain of the function: g(x)= 3/ 4-3x
14.) Find the domain of the function: p(x)-x^3-x^2+x-2

Click here to see answer by stanbon(75887)

Question 147317: I need to find out what the population would be 4 years from now. The population is 45,103,674 and the growth rate if 1.40%.

Click here to see answer by Nate(3500)

Question 147367: find the indicated outputs for f(x)= 5x to the second power-3x.
f(0)=?
f(-1)=?
f(2)=?
Click here to see answer by vleith(2983)

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, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660