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Tutors Answer Your Questions about Matrices-and-determiminant (FREE)
Question 45442This question is from textbook Finite math
: U = {a,b,c,d,e,f,g,h}, A = {b,c,d}, A'=
My answer is {a,e,f,g,h} Thanks for checking my answer.This question is from textbook Finite math
Click here to see answer by stanbon(26284)   |
Question 47751: I am having trouble finding the determinant on a 4x4 matrix/Triangular Form. Please explain...
4 0 3 -2
3 1 2 -1
1 -6 -2 2 D = 39
2 2 0 -1
I tried exchanging Rows 3 and 4 over 1 and 2 but I can't get the 39. What should I remember when dealing with this form? Thanks a lot.
Click here to see answer by stanbon(26284) |
Question 48455: Please lend me a helping hand. I would really appreciate your help and may God bless you for your continued services.
1)What are the factors of x3 + 6x2 - x - 30?
a. (x + 1)(x - 2)(x + 15)
b. (x + 1)(x + 3)(x - 10)
c. (x - 2)(x + 3)(x + 5)
d. (x - 1)(x + 5)(x + 6)
2)What are all the possible rational zeros for f(x) = x3 + 8x + 6?
a. +1, +6
b. +1, +2, +6
c. +1, +2, +3, +6
d. +1, +2, +3, +6, +12
3)What are all the possible rational zeros for f(x) = 6x3 + 6x2 - 15x - 2?
a. +1, +2, +1/2, +1/3, +2/3, +1/6
b. +1, +2, +1/3, +2/3
c. +1, +2, +3,
d. +1, +2, +3, +6,
4)Identify all rational zeros for f(x) = x3 + 4x2 - 3x - 18.
a. 1, -3, -6
b. -1, 2, -9
c. 2, -3, -3
d. -1, -3, 6
5)Identify all the rational zeros for f(x) = x3 - x2 - 8x + 12.
a. 2, 2, -3
b. 2, -2, 3
c. -1, 3, 4
d. 1, -3, 4
6)Identify all the rational zeros for f(x) = x3 + 4x2 - 2x + 15.
a. 1
b. 3
c. -5
d. 1, 3, -5
7)
How many positive real zeros does the funtion f(x) = x4 + x3 - 7x - 1 have?
a. 3 or 1
b. 1
c. 2 or 0
d. 0
8)How many negative real zeros does the function f(x) = x5 + x4 - x2 - x + 1 have?
a. 4, 2, or 0
b. 3
c. 2 or 0
d. 3 or 1
Click here to see answer by stanbon(26284) |
Question 48491This question is from textbook College Algebra
: The system of linear equations has a unique solution. Find the solution using Gaussian elimination or Gauss-Jordan elimination.
x + y + 6z = 3
x + y + 3z = 3
x + 2y+ 4z = 7
I know this has to do with combining rows and eliminating variables until only one is left, then back-substituting into the system to find the remaining variables, but I honestly don't know where to begin the elimination.
Thank you so very much for all your help!This question is from textbook College Algebra
Click here to see answer by AnlytcPhil(958) |
Question 48509This question is from textbook College Algebra
: The system of linear equations has an unique solution. Find the solution using Gaussian elimination of Gauss-Jordan elimination.
These equations use sub-exponents, though.
2x sub(1) + x sub(2) = 7
2x sub(1) - x sub(2) + x sub(3) = 6
3x sub(1) -2x sub(2) +4x sub(3) = 11
How do you treat these sub-exponents?
Thank you so much! This question is from textbook College Algebra
Click here to see answer by AnlytcPhil(958) |
Question 51975: I know this isn't that right topic for my question. But I'm in algebra 3 and today we got this sheet that my teacher made up and one of the questions was...
What letter comes next?
O T T F F S S
and another question was...
A shop specializing in gift baskets of fruit has seven kinds of fruit available. How many different assortments of one or more kinds of fruit can the shop provide?
Click here to see answer by rapaljer(3622) |
Question 54204: Find coefficients a, b, c, and d so that the curve shown in Figure Ex-26 (text page 22) is given by the equation ax^2 + ay^2 + bx + cy + d = 0.(Three points: (4, -3), (-4, 5), (-2, 7))
The answer I got was:
Therefore, the coefficients in the equation for this curve would be as follows:
a = a, b = -2a, c = -4a, and d = -29a, where a is any real number.
Is that possible?
Click here to see answer by Edwin McCravy(2922) |
Question 54940: JANE , THE SALES REPRESENTATIVE OF DT.COM EQUIPMENT LTD IN 3 DAYS OF TRIAL SALES IN WESTERN REGION OF THE COUNTRY SOLd 2 P'CS AND 3 CD PLAYERS AND 4 TV'S ON THE FIRST DAY;3 PC'S AND ONE CD PLAYER , AND 2 TV'S ON THe SECOND DAY ; 5 PC'S AND 2 C'D PLAYERS , AND ONE TV ON THE THIRD DAY . HE RECEIVED A TOTAL ( 000KSH) OF 250,190, AND 280 ON THE FIRST, SECOND AND THIRD DAY RESPECTIVELY . WHEN HE WAS HANING OVER THE MONEY TO THE ACCOUNTANT HE WAS UNABLE TO ANSWER OF HOW HE SOLD A UNIT OF EACH ITEM .
QUESTION :
ASSIST THE ACCOUNTANT WHO ACTUALLY REQUIRED THESE FIGURS FOR PROPER RECORD KEEPING
Click here to see answer by foleysdad(7) |
Question 55558: hi, i'm having trouble with one specific problem which you use "substitution" in order to solve two equations by using inverse matrices. My teacher told us the answer, but not how to solve it. the answer he gave is: (2,4,8) and the equations are >>>>>sorry it wouldn't show up if i highlighted it>>>>>> 2|x-1|-|y+3|=-1 and 5|x-1|-2|y+3|=1 < he told us to 'substitute' to make it easier, for example make a= |x-1| and b=|y+3| that way it would be  and  but when i do that, and i create the matrices, the inverse always ends up with [[3][7]] ex: a=3 b=7 . but thats where i lose it? i don't understand how he got (2,4,8) when x=4, -2 and y= 4, -10. so if you could help me, or show me what i did wrong and what steps to take please help
Click here to see answer by stanbon(26284) |
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