Tutors Answer Your Questions about Linear Algebra (FREE)
Question 30544: (#7) Question:
Solve the system:
x^2+y^2=20
x^2-2y^2=8
Answers:
(A) (04,2) (-4,-2)
(B) (1, sqrt19) (-1, -sqrt19)
(-1 sqrt 19) (-1. -sqrt 19)
(C) (4,2) (4, -2)
(D) (4,2) (4, -2)
(-4,2) (-4, -2)
Please be specefic as to which letter answer is correct.
Click here to see answer by sdmmadam@yahoo.com(530) |
Question 30330: Quesion : Solve for y: y^4-4y^2=40y-10y^3
y= or y= or y= or y=
Possible Answers:
(a) 0, 10, 2, -2
(b) 0, -10, -2, 4
(c) 0, -10, 2, -2
(d) 0, 10, -2, -4
Click here to see answer by Fermat(136)  |
Question 30458: (8) Question:
How many solutions does this nonlinear system have?
2y=2x^2+4x+9
y=x^2+2x+3
(A) 0
(B) 1
(C) 2
(D) 3
(E) Infinite solutions
Thanks!
PLEASE NOTE THIS IS THE CORRECT QUESTION AND WRITTEN EXACTLY HOW IT IS FOUND IN MY WORK ~
Click here to see answer by Fermat(136)  |
Question 30546: #16
Use the remainer theorem to find P(-3) if P(x) = x^6+2x^5+5x^3-8x^2+26
Also find the quotient polynomials that leads tothe remiander.
(A) 62; x^5+5x^4+3x^3+14x^2-20x-12
(B) 62; x^5-x^4+3x^3-4x^2+4x-12
(C) -3; x^5-x^4+3x^3-4x^2+4x-12
(D) -3; x^5+5x^4+3x^3+14x^2-20x-12
Please be specific as to which letter is correct.
Click here to see answer by ikdeep(226)  |
Question 30246: Question is:
What can you say about the solutions of this nonlinear system?
y=4x^2+4
y=2x^2-4
(a) The system has no solution
(b) The system has two real solutions
(c) The system has two imaginary solutions
(d) The system has one solution of multiplicity 2
Please be specific on which is the correct answer- thank you
Click here to see answer by sdmmadam@yahoo.com(530) |
Question 30237: Question:
Solve for y: y^4-4y^2=40y-10y^3
y=________ or y+_________ or y= _____________ or y= _______________
Possible Answers:
(a) 1, 10, 2, -2
(b) 0, -10, -2, 4
(c) 0, -10, 2, -2
(d) 0, 10, -2, -4
Please help and be specific as to which answer is correct.
Click here to see answer by sdmmadam@yahoo.com(530) |
Question 30580: I want to find about(three things)the set, W={(1,0,0),(0,1,0),(0,0,1),(-7,8,-9)}
Is this linearly dependent? Does this spans R3? Is this a basis for R3?
I think this set spansR3 because the first three vectors span R3, so adding the last one does not change it. Also, I think it is linearly dependent as there are nontrivial solutions. But, I am not sure if it is not a vasis for R3. Could you give me advice???
Click here to see answer by venugopalramana(3286) |
Question 30594: Can you please help.
(33)
Find the vertex, focus, and directrix of the graph of the equation 8(y+2) =(x+6)^2
(A) vertex (-6,-2) focus (-6,0) directrix is y=-4
(B) vertex (6, -2) focus (-6, 4) directrix is y=-8
(C) vertex (6, -2) focus (6,0) directrix is y=4
(D) vertex (-6, -2) focus (6,4) directrix is y=o
thanks for your help
Click here to see answer by Nate(3500) |
Question 30216: Question:
Use the synthetic division to determne which pair of integers prvodes both a lower and an upper bound for the zeros of f(x) =2x^4-14x^3+22x^2-14x-24
Possible Answers:
(a) 0,6
(b) none of these
(c) -1,7
(d) 1,6
Please be specific in which letter answer is correct. Thanks!
Click here to see answer by Nate(3500) |
Question 30213: Question:
Use the factor between therorm to determin whichofhte following is not a factor of f(x) =3x^4-x^3-68x^2+76x+80
Possible Answer:
(a) a-2
(b) 3x+2
(c) 3x-2
(d) x+5
Please be specific in which possible answer is correct. thank you!!!
Click here to see answer by sdmmadam@yahoo.com(530) |
Question 30781: The question is:
Determine the vertices, asymptotes, and foci of the hyperbola defined by 144x^2-81y^2=81
Answers are:
(A) vertices (0, +1) asymptotes: y=+4/3x, foci (0, +5/4)
(B) vertices (0, +1) asymptotes: y=+3/4x, foci: (0, +5/4)
(C) vertices (+3/4,0) asymptotes: y=+3/4x. foci: (+5/4,0)
(D) vertices (+3/4,0) asymptotes: y=+4/3s, foci: (+5/4,0)]
Thanks for your help with this.
Click here to see answer by Nate(3500) |
Question 30983: Let P be the vector space of polynomials in "t" with real coefficients. Show that the inner product < f,g > = the integration from -1 to 1 of f(t)g(t)dt defines an inner product on P.
I went to speak with my professor about this but I am still not sure what the question even means. I understand inner products and integration, and how integration can be used to represent inner products, but this question is giving me blanks. Also, if you find the textbook, is this question like Example 7 on page 434 in Chapter 6 only with different numbers>
Click here to see answer by acerX(62) |
Question 30946: I cannot fill out the book infromation because this is an independent study course for college algebra at Brigham Young Univeristy. This is a paper coruse, no book was provided!
Question:
Choose the ordered pair(s) below that satisfy the function y=3^x.
A. {1/2,-3)
B. (-1,1/3)
C. (-2, 1/9)
D. (0, -3)
E. both b and c
Thanks!
Click here to see answer by askmemath(368) |
Question 30944: I cannot fill out the book infromation because this is an independent study course for college algebra at Brigham Young Univeristy. This is a paper coruse, no book was provided!
Question:
Solve this exponential equation for x: 5^4x+6=25
A. -3/4
B. -1
C. 1
D. 3/4
Thanks for your help
Click here to see answer by mukhopadhyay(490) |
Question 31359: it is approximately 300 miles from chicago, illinois, to st. louis, missouri. allowing for various traffic conditions, a driver can average approximately 60 miles per hour.
i have to write a linear function that expresses the distance to be traveled to reach st. louis, s, as a function of time, t.
I have to show my work. thanks for the help
Click here to see answer by stanbon(75887) |
Question 31476: Let S={v1, v2, v3}where v1^T=[1 0] v2^T=[0 1] v3^T=[-1 1]
Find every subset of S that is a basis for R^2.
I have the matrix
[1 0 -1 0]
[0 1 1 0]
where x1-x3=0 and x2+x3=o and one basis of {v1, v2} but I don't know where to go from there.
Click here to see answer by venugopalramana(3286) |
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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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