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

Tutors Answer Your Questions about Functions (FREE)

Question 319395: Without graphing determine whether the following pairs of lines are (a paralell), (b) perpindicular, or (c) neither.
5x - 6y = 19
6x + 5y = -30

Click here to see answer by stanbon(75887)

Question 319654: Given n(x) = 6x^2 + 11, find n(-3).

Click here to see answer by checkley77(12844)

Question 319659: Find the domain of the function.
f(w)=
Click here to see answer by stanbon(75887)

Question 319658: Which set of ordered pairs represents a function from P to Q?
P= {2,4,6,8} Q={-2,0,2}
a){(2,-2),(4,0),(4,2),(6,0),(8,-2)}
b){(6,-2),(6,0),(6,2)}
c){(6,0),(4,-2),(2,0),(4,2),(6,-2)}
d){(4,0),(6,0),(8,0)}
e){(2,2),(6,0),(2,-2),(6,2)}

Click here to see answer by stanbon(75887)

Question 319656: Evaluate the function at the specified value of the independent variable and simplify.

f(x) = { x, x/= -1
x^2-3x, -1< x <= 1
x^3-3x^2, x>1
f(-2/5)
Click here to see answer by stanbon(75887)

Question 319993: find the domain of the function.
f(x)=sqrt(4-x)

Click here to see answer by scott8148(6628)

Question 319923: 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 is x cm long. Predict the height of a woman whose humerus is 32 cm long. Please help I am stuck
Click here to see answer by ankor@dixie-net.com(22740)

Question 320041: given functions f and g perform the indicated operations.
f(x)=sqrt(4x+4), g(x)= sqrt(4x-9)
find fg
possible answers: A)(4x+4)(2x-3) B)(sqrt(4x+4))(sqrt(4x-9)) C)(2x-3)(sqrt(4x+4) D)(4x+4)(4x-9)
Click here to see answer by Fombitz(32388)

Question 320047: don't know if this is the right category or not.
Evaluate (f/g)(-3) where f(x)=x^2 - 9x - 10 and g(x)=9x + 11.
Click here to see answer by Fombitz(32388)

Question 320063: find the domain of P(x)=x^2+8
Click here to see answer by Fombitz(32388)

Question 320126: Having a hard time evaluating this equation of a nonlinear function completely lost can someone please explain to me how to find the right answer?
y = 3/(x-1)
Click here to see answer by Fombitz(32388)

Question 320133: I am terrible at finding the domain
Find the domain of the function:
9(x)=5/7-6x
Thank you
Click here to see answer by solver91311(24713)

Question 320182: 3x+10
inputs
f (6) and f (-8)
could you please help we figure out the inputs for this nonlinear function
Click here to see answer by Fombitz(32388)

Question 320217: Find the domain of the function
P(X)=x^2-2x+4
BY X^2 I think this means squared right because that is what I mean.
What is the domain of P?
Click here to see answer by nyc_function(2741)

Question 320124: 2x = y use x = 5 and x = 15 to find the two solutions for y.
Click here to see answer by rfer(16322)

Question 320811: For the Function f(x)=x^2-x+1
Find f(0)

Solve f(x)=0
Click here to see answer by Fombitz(32388)

Question 321090: please help me solve this question 6x�-11x+5
please explain as you solve the problem
thank you
Click here to see answer by scott8148(6628)

Question 321706: Given that f(x)= 4/x^2-5 and g(x) = sqrt x, find (f o g)(x) and its domain.
Click here to see answer by Fombitz(32388)

Question 321857: I need help figuring out how to work these problems. I will only submit one, and maybe that can help me figure out how to do the others. Please and Thank you very much!
My directions:
Solve using the five-step problem-solving process. Show all steps necessary to strive at your solution.
The sum of twice a number and 4 less than the number is the same as the difference between -32 and the number. What is the number?
Click here to see answer by solver91311(24713)

Question 321894: What is the value of g(x) - f(x) if f(x) = 2x + 4, g(x) = 3x - 2 and x = 12?
3x - 2 - (2x + 4) = 3x - 2 - 2x - 4 = x - 6
If x = 12 , x - 6 = 12 - 6 = 6

Click here to see answer by Alan3354(69443)

Question 321897: For a ________ to be a ________, there must be only and exactly one y that corresponds to a given x
Click here to see answer by Edwin McCravy(20056)

Question 321999:
If f(x) = 4x - 2 and g(x) = 3x. What is f(g(2))? I got 22
Evaluate t(y) = y3 + 64 if y = -4.
If f(x) = x - 2, for what value of x does f (3x) = f(x+1)? I got 6
Click here to see answer by Fombitz(32388)

Question 322023: What is the smallest integer that is NOT in the domain of the function below?
f(x)= squareroot of 4-x
my answer is 5

Click here to see answer by nyc_function(2741)

Question 321994: what is the result of substituting a value for a variable in a function?
Click here to see answer by nyc_function(2741)

Question 321936: What is the smallest integer that is NOT in the domain of the function below?
f(x)= sq. root of 4-x
If f(x) = x - 2, for what value of x does f (3x) = f(x+1)?
Evaluate t(y) = y3 + 64 if y = -4.
Click here to see answer by brittanny(1)

Question 322111: y = x^2 -2 is a function, but x = y^2 - 2 is not... can you say why?

Click here to see answer by Edwin McCravy(20056)

Question 322256: I have a question:
Give an ordered pair (u,v) of numbers that satisfy the following equation: u-2v=2
Click here to see answer by Alan3354(69443)

Question 322400: find the domain of the following function for the range given below. f(x)=-4x+1 range = (0,1,2,3)
Click here to see answer by solver91311(24713)

Question 322392: Imagine you are at a gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation C(g)=3.50(g) please help don't understand.......
find c(7)
Click here to see answer by Earlsdon(6294)

Question 322390: Imagine you are at a gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation C(g)=3.50(g) Please help don't understand!!!!
What does the number 3.50 represent in this problem?
Click here to see answer by solver91311(24713)

Question 322457: (-4m^4)^2
Hi I'm not really sure how to go about working out this problem any help would really help me! Thank you in advance!!!
Click here to see answer by jim_thompson5910(35256)

Question 322494: Imagine you are at a gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation C(g)=3.5(g)
Find C(3)
please help
Click here to see answer by jim_thompson5910(35256)

Question 322499: Imagine you are at a gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation C(g)=3.50(g)
If you were to graph C(g), what would be an appropriate domain and range? \
please help
Click here to see answer by jim_thompson5910(35256)

Question 322506: Suppose that during a storm rain is falling at
a rate of 1 inch per hour. The water coming from a circular
roof with a radius of 20 feet is running down a downspout that can accommodate 400 gallons of water
per hour.
(a) Determine the number of cubic inches of water
falling on the roof in 1 hour.
(b) One gallon equals about 231 cubic inches. Write a
formula for a function g that computes the gallons of
water landing on the roof in x hours.
(c) How many gallons of water land on the roof during
a 2.5-hour rain storm?
(d) Will one downspout be sufficient to handle this
type of rainfall? How many downspouts should there
be?
your help is well needed!
Cheers

Click here to see answer by galactus(183)

Question 322554: 500 invested at 7% for 5 years compounded monthly
Click here to see answer by mananth(16946)

Question 322553: $900 invested at 5% for 10 years compounded semiannually
Click here to see answer by mananth(16946)

Question 322744: I know the differences between domain and range, and that square roots are a restricted function, but are there others?
Click here to see answer by solver91311(24713)

Question 322833: Find the domain of the function.
f(x)=2x-2
I am confused on how to find the domain.
Click here to see answer by jim_thompson5910(35256)

Question 322836: Write a slope-intercept equation for a line with the given characteristics.
m=5/4, passes through (4,7)
Click here to see answer by jim_thompson5910(35256)

Question 322835: Find the domain of the function.
f(x)=sqrt(18-x)

Click here to see answer by rapaljer(4671)

Question 322839: determine the equation of the line described. put answer in slope-intercept form, if possible.
Through (-8,1), perpendicular to 5x+3y=-13
Click here to see answer by Fombitz(32388)

Question 323057: find the indicated outputs for f(x)=5x2-5x
f(0)=
f(-1)=
f(2)=
Click here to see answer by rapaljer(4671)

Question 323056: find the indicated outputs for f(x)=5x2-5x
f(0)=
f(-1)=
f(2)=
Click here to see answer by rapaljer(4671)

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