Tutors Answer Your Questions about Functions (FREE)
Question 763574: I have to find the Domain of g(x)= 3-2√(5-x). i've gone on to mathway.com where it solved it for me but it wont show me the step by step. i've tried moving the 3 over then dividing everything by 2 then squaring everything to get rid of the square root. but then after that i don't know what to do. i've tried searching all night for some form of example online of how to do this problem but none of the examples have numbers in front of the square root so i have no idea what to do with them. :(
Click here to see answer by josmiceli(19441)   |
Question 763574: I have to find the Domain of g(x)= 3-2√(5-x). i've gone on to mathway.com where it solved it for me but it wont show me the step by step. i've tried moving the 3 over then dividing everything by 2 then squaring everything to get rid of the square root. but then after that i don't know what to do. i've tried searching all night for some form of example online of how to do this problem but none of the examples have numbers in front of the square root so i have no idea what to do with them. :(
Click here to see answer by josgarithmetic(39613) |
Question 764104: The radius of a spherical balloon is increasing at a rate of 7 cm per second. Derive the composite function, V(t), for the volume of the balloon in terms of time t and use it to determine the volume of the balloon after 8 seconds. Thanks for any help.
Click here to see answer by Alan3354(69443)  |
Question 764830: The values in the table below belong to a linear function.
x y
3 7
5 13
10 28
a) What is the slope of the graph of the function?
b) What is the y-intercept?
c) Draw the graph of the function.
d) Write the equation of the function.
e) Make up a situation that fits the function
Click here to see answer by MathLover1(20849)  |
Question 764988: F(x) =x^2+2x+4 ; g(x)=v(9-x) (When I do v() that is a square root symbol)
Find each of the following if it exists:
My question is (fg)(-7)
(-7^2+(2)(-7)+4)(v(9-(-7))
(-49-14+4)(v(16))
(-59)(4)
-236
I'm wondering if I figured this out correctly. The minus negative 7 in the square root is throwing me off I dont understand if i should add the 7 because there are two negatives or if I should subtract a negative 7 and also the negative 7 squared it throwing me off I'm confused about how I should count the negatives. Should I count it as -7^2 or (-7)^2? Thank you very much for your help.
Click here to see answer by josgarithmetic(39613) |
Question 764988: F(x) =x^2+2x+4 ; g(x)=v(9-x) (When I do v() that is a square root symbol)
Find each of the following if it exists:
My question is (fg)(-7)
(-7^2+(2)(-7)+4)(v(9-(-7))
(-49-14+4)(v(16))
(-59)(4)
-236
I'm wondering if I figured this out correctly. The minus negative 7 in the square root is throwing me off I dont understand if i should add the 7 because there are two negatives or if I should subtract a negative 7 and also the negative 7 squared it throwing me off I'm confused about how I should count the negatives. Should I count it as -7^2 or (-7)^2? Thank you very much for your help.
Click here to see answer by stanbon(75887) |
Question 765693: [question part "a"] write a rule using function notaion f(x)= ___
[question part "b"] then give a reason why its a function.
1a. choose any number, then divide it by 6. i wrote down f(x)= x/6
1b. im lost on the second part of the question
2a choose any number, multiply it by 3, then add15. i wrote down f(x)=3x+15
2b. im lost on the second part of the question
Click here to see answer by rothauserc(4718)  |
Question 765724: describe the domain and range for the given relation in interval notation.
question how am I supposed to know which point comes first on like a graph that does not have definite points on it? cant really put it into words without showing the example
Click here to see answer by rothauserc(4718) |
Question 765966: 2) Which of the following relations equals the relation {(a,b), (1,2), (x,y)}?
A) {(a,b), (1,x), (2,y)}
B) {(x,y), (a,b), (1,2)}
C) {12,xy), (a,b)}
D) {(b,a), (2,1), (x,y)}
E) None of the above
Click here to see answer by solver91311(24713)  |
Question 767173: Find the domain of the function.
h(x) = ln[(x^2)/(x-4)]
What I have tried on the problem so far is as follows:
[(x^2)/(x-4)] > 0
(x-4) * [(x^2)/(x-4)] > 0 * (x-4)
x^3 - 4x^2 > 0
x^2 (x-4) > 0
-(x-4) -(x-4)
x^2 > -x-4
+x +x
x^2 +x > -4
Click here to see answer by solver91311(24713) |
Question 767471: I really need help with the following problem. The function f is defined as follows f(x)= {x+5 if -3 less than or equal x < 1
{8 if x=1
{-x+4 if x > 1 }
Find the domain of the function
Locate any intercepts
Any help will be greatly appreciated.
Click here to see answer by Edwin McCravy(20054)  |
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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
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