Tutors Answer Your Questions about Linear Algebra (FREE)
Question 1084499: the diameter of a hose is inversely proportional to the time it takes to fill a tank.
if the diameter of hose is 1 inch, and the filling rate is 10 ft per second, how much water will be in the tank after 1.75 seconds?
appreciate your help,
Gul
Click here to see answer by Theo(13342)   |
Question 1084702: a person spent 3/5 of his money in first store, and then $2 on parking. he then spent 1/3 of what is left in 2nd store. at the end he had $12 left. how much money he started he had started with?
Thanks, appreciate your help
Click here to see answer by htmentor(1343)  |
Question 1084960: A cyclist has travel 6 miles to reach his destination. he has to either choose to travel on flat route with 11 miles per hour. or he goes on uphill at 3 miles per hour for 3 miles and then downhill at 23 miles per hour for the remaining 3 miles. he chooses to go with the uphill and downhill because he
averages the uphill and downhill speeds and concludes that (23+3)/2=13 MPH.
What is wrong with?
a) 2 minutes is less significant when compared 13 MPH to 11 MPH
b) average speed can't be maintained through out the uphill and downhill trip
c) More time is lost on uphill trip
d) downhill speed compensates the time lost on uphill
Thanks for your help
Gul
Click here to see answer by jorel1380(3719)  |
Question 1085674: F(x)=3x+7 and g(x)=1-6x
A: domain of f,g,f+g,f-g,fg,ff,f/g, and g/f
B: (f+g)(x),(f-g)(x),(fg)(x),(ff)(x),(f/g)(x),(g/f)(x)
Click here to see answer by Fombitz(32388)  |
Question 1086843: Find the maximum of the objective function, f, subject to the constraints f=15x +25y {3x +4y > 60
x + 8y > 40
11x + 28y < 380
x>0, y>0
The greater and less than signs have the or equal to underscore. If possible could you show me the steps in detail because I am confused beyond belief.
Click here to see answer by Fombitz(32388) |
Question 1086854: Let v1=[2,0,6] , v2=[-1,4,5] , v3=[1,-1,1].
Find the value(s) of k for which b=[2,1,k] can be written as a linear combination of vectors v1, v2, and v3.
My attempt:
c1v1 + c2v2 + c3v3 = b.
[[2 -1 1 | 2]
[0 4 -1 | 1]
[6 5 1 | k]]
I simplified this matrix down to:
[[1 -1/2 1/2 | 1]
[0 1 -1/4 | 1/4]
[0 0 0 | k-8 ]]
I got stuck at this part. I was not sure what to do after this or whether I was approaching the problem properly.
Click here to see answer by ikleyn(52772)  |
Question 1087356: Use row operations to solve the system.
x+y-z=2
3x-y+z=2
x-4y+2z=-35
A. This system has exactly one solution. The solution is (__,__,__)
B. This system has infinitely many solutions of the form (__,__,z) where z is any real number.
C.This system has no solution.
Click here to see answer by Fombitz(32388) |
Question 1088154: Maximize z=0.4x-0.2y
Subject to:
2x-5y>=3
2x-y<=5
3x+y=6
x,y=0
I have been trying to solve the question but my answer is not always in synch with the graph. Could you help so that I know where I am going wrong thank you.
Email alexciathompson@outlook.com
Click here to see answer by ikleyn(52772) |
Question 1089671: This problem was labled in my textbook as a nonlinear equation, but I couldn't find a better spot to put it.
X^2+y^2=3
{
x-y=2
I'm ending up with x= plus or minus sqrt14/2 my textbook has x as plus or minus 1.
Could you explain to me where I'm going wrong?
Thank you!
p.s. I wasn't quite sure how to notate the fact that the two equations went together so I just did the little brackets between them. I'm not a math person, so if you could be very clear and explicit that would be much appreciated. Thanks again!
Click here to see answer by Fombitz(32388) |
Question 1089671: This problem was labled in my textbook as a nonlinear equation, but I couldn't find a better spot to put it.
X^2+y^2=3
{
x-y=2
I'm ending up with x= plus or minus sqrt14/2 my textbook has x as plus or minus 1.
Could you explain to me where I'm going wrong?
Thank you!
p.s. I wasn't quite sure how to notate the fact that the two equations went together so I just did the little brackets between them. I'm not a math person, so if you could be very clear and explicit that would be much appreciated. Thanks again!
Click here to see answer by Theo(13342) |
Question 1089671: This problem was labled in my textbook as a nonlinear equation, but I couldn't find a better spot to put it.
X^2+y^2=3
{
x-y=2
I'm ending up with x= plus or minus sqrt14/2 my textbook has x as plus or minus 1.
Could you explain to me where I'm going wrong?
Thank you!
p.s. I wasn't quite sure how to notate the fact that the two equations went together so I just did the little brackets between them. I'm not a math person, so if you could be very clear and explicit that would be much appreciated. Thanks again!
Click here to see answer by KMST(5328)  |
Question 1089671: This problem was labled in my textbook as a nonlinear equation, but I couldn't find a better spot to put it.
X^2+y^2=3
{
x-y=2
I'm ending up with x= plus or minus sqrt14/2 my textbook has x as plus or minus 1.
Could you explain to me where I'm going wrong?
Thank you!
p.s. I wasn't quite sure how to notate the fact that the two equations went together so I just did the little brackets between them. I'm not a math person, so if you could be very clear and explicit that would be much appreciated. Thanks again!
Click here to see answer by ikleyn(52772) |
Question 1089671: This problem was labled in my textbook as a nonlinear equation, but I couldn't find a better spot to put it.
X^2+y^2=3
{
x-y=2
I'm ending up with x= plus or minus sqrt14/2 my textbook has x as plus or minus 1.
Could you explain to me where I'm going wrong?
Thank you!
p.s. I wasn't quite sure how to notate the fact that the two equations went together so I just did the little brackets between them. I'm not a math person, so if you could be very clear and explicit that would be much appreciated. Thanks again!
Click here to see answer by MathTherapy(10551)  |
Question 1089975: Make a histogram, using a bin width of ten, to display the bowling scores for these 21 players: 91, 73, 105, 112, 85, 78, 113, 99, 107, 88, 89, 75, 96, 108, 106, 97, 87, 98, 83, 95, 94
Click here to see answer by Fombitz(32388) |
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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
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