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Tutors Answer Your Questions about Matrices-and-determiminant (FREE)
Question 358501: A company manufactures both mountain bikes and trail bikes. The cost of materials for a
mountain bike is $70, and the cost of materials for a trail bike is $50. The cost of labor to
manufacture a mountain bike is $80, and the cost of labor to manufacture a trail bike is $40.
During a week in which the company has budgeted $2500 for materials and $2600 for labor, how
many mountain bikes and how many trail bikes does the company plan to manufacture?
Click here to see answer by jrfrunner(365)   |
Question 358355: THE NAME OF THE ASSIGNMENT IS OPERATIONS WITH MATRICES
find C+D if C=[14,8,-1] and D=[-10,8,15]
find A-B if A=[2,-7 and B=[-3,2
1,4] -6,0]
if A=[2,5 and B=[1,2 find 4A-5B
-3,-6] -4,9]
Click here to see answer by Fombitz(13828)  |
Question 359168: The road from Tedium to Excitement is uphill for 5 miles, level for 4 miles, and then downhill for 6 miles. John Mayer walks from Excitement to Tedium in 4 hours. Later he walks halfway from Tedium to Excitement and back again in 3 hours and 55 minutes. Finally he walks all the way to Excitement from Tedium in 3 hours and 52 minutes. What are his rates going uphill, downhill, and on level ground assuming that these rates remain constant?
Click here to see answer by ankor@dixie-net.com(15650)  |
Question 359168: The road from Tedium to Excitement is uphill for 5 miles, level for 4 miles, and then downhill for 6 miles. John Mayer walks from Excitement to Tedium in 4 hours. Later he walks halfway from Tedium to Excitement and back again in 3 hours and 55 minutes. Finally he walks all the way to Excitement from Tedium in 3 hours and 52 minutes. What are his rates going uphill, downhill, and on level ground assuming that these rates remain constant?
Click here to see answer by mathtutor19(8) |
Question 359714: I am attempting to help my daughter with her Algebra 2 homework. I got the problem set up but have no clue how to proceed from here. The problem is
(1 1 1
1 1 1
1 1 1)
The next part of the matrix which is to be multiplied is (4 over 9).
This the matrix, I think, that I need to work with.
The original problem states: 1 putt is a hole in one; 2 putts is a birdie; 3 putts is a par and 4 putts is a bogey.
Grace placed 18 holes of miniature golf. On each hole, sh made a birdie, a par, or a bogey. She made 4 more pars than birdies and bogeys combined. Her total score was 55. How many birdies did Grace get?
Now I am lost once I got the above problem set up. Can you please help?
Click here to see answer by Fombitz(13828) |
Question 361049: I have worked out Eigenvalues of the following matrix
1 -1 2
0 2 0
3 -3 2
They are = -1, 2, 4
I cant seem to work out the eigenvector for -1. Could someone show me step by step how this achieved. I can then use this to work out 2, and 4.
Click here to see answer by robertb(4012)  |
Question 84358: Can someone help me with these two problems explaining them to me if someone has time please.
Problem #1
If A is a 5 X 2 matrix and A + k = A, what do you know about K?
Problem #2
Find the values of the variables in each equation.
i don't know how to do the matrix box so i will separate them the first matrix is a 2 X 3 plus the second matrix that is a 2X 3 Equal the third matrix which is a 2 X 3. I try to separate the numbers inside the matrix with a forward slash. so a+2 is ontop of row that reads 4k and then the same for the second matrix and the last matrix
[ a+ 2 / 3z+1 / 5m ] + [ 3a / 2z / 5m] = [ 10 / -14 / 80]
[ 4k / 0 / 3 ] [ 2k/ 5 / 6] [ 10 / 5 / 9]
Click here to see answer by robertb(4012) |
Question 364426: Solve the matrix equation
-2x+3■(2&-8@-4&2)=■(4&-6@2&-8)
I am not sure how to type matrices in here.
Please help, I am trying to help my son with his algebra and neither one of us understands how to do this. Could you please explain in step by step instructions. Thank You.
Click here to see answer by Fombitz(13828) |
Question 366412: Please help me solve this equation:
| x 5 2 |
|-6 4 1 | = x^2 + 22x - 1
| 3 1 x |
I've tried:
(solving the 3x3..)
4x^2+15-12-24-x+30x
4x^2+29x-21
(then equaling that to the right part of the original equation...)
4x^2+29x-21=x^2+22x-1
3x^2+7x-20=0
I don't know know where to go from there to solve for x.
Click here to see answer by solver91311(16884)  |
Question 368234: I need help with this problem please. I did row-1---row-2 then 2row-2----r2 then 3r1 + r3--r3 and I am stuck....Any help plssssss.. Thanks
Use elementary row operations to solve the linear system
X – y + 3z = 4
X + 2y – 2z = 10
3x – y + 5z = 14
Click here to see answer by solver91311(16884) |
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