415 Answered Questions for the topic linear algebra

#### i need equation answers

What is the value of x in the equation , when y = 3? is their a answer

#### Linear approx questions

Hello,I would appreciate any help with this. I am just having trouble navigating these type of questions:1.Suppose that we don't have a formula for g(x) but we know that g(2) = −1 and g'(x)=sqrt(...
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#### Help me with my math problem

I have a matrix of Ax=b. That is 3X4. With the entry x+3y+7z=12. 1x+4y+10z=15. And 2x+3y+5z=X or we can call X really b3. I believe I need to somehow reduce to row echelon and solve for b3 by...
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#### Matrix solve for b

I have a matrix of Ax=b. That is 3X4. With the entry x+3y+7z=12. 1x+4y+10z=15. And 2x+3y+5z=X or we can call X really b3. I believe I need to somehow reduce to row echelon and solve for b3 by...
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11d

#### Graphing systems of linear equations

The sum of Sherance and John’s ages is 70. John is four times as old is Sharon. If you let S equal share his age and TJ equal John’s age then the problem can be represented by a system of...
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13d

#### i have an input output matrix problem I don't know how to complete for homework.

My homework is asking "Suppose the following matrix represents the input-output matrix of a simplified economy that involves just three commodity categories: Manufacturing, Agriculture, and...
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15d

#### Please Help: Linear Algebra Question (linear transformations)

If T is a linear transformation such thatT([3, 2])=[21, 5, -2] and T([4, -1])=[28, -8, 1]Then the matrix A that induces T is:*I'm confused on how to even approach this problem*Thank you

16d

#### Solving a word problem

A total of 756 tickets were sold for the school play. They were either adult tickets or student tickets. There were 56 more student tickets sold more than adult tickets. How many adults tickets...
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17d

#### HELP! Vectors - collision

Two boats, A and B, are moving in straight lines and the position of each particle after t seconds is given by the following equations: 𝒓𝐴 = 2𝑡𝒊 + (30 − 𝑡)𝒋 𝒓𝐵 = 2𝑡𝒊 + 60𝒋 − 4𝑡𝒋 (a) Find the...
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17d

#### Help me! Math Vectors! A helicopter wishes to fly directly East at 100 km/h.

A helicopter wishes to fly directly East at 100 km/h. If a constant wind blows directly from the North-East at 40 km/h, find the direction and velocity of the wind speed that must be maintained in...
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17d

#### Find the coordinate vector of x=[-4,1,-2] with respect to the basis B=([1,7,7], [0,1,-6], [001]) for R^3

Find the coordinate vector of x=[-4,1,-2] with respect to the basis B=([1,7,7], [0,1,-6], [001]) for R^3 XB=[?,?,?]

18d

#### An arithmetic sequence has a 10th term of 15 and 14th term of 35.

What is the value of the first term? Use the value of d in one of the sequence equations from a.What is the general sequence equation for this situation?

23d

#### Write an equation to model this situation

Movie tickets for children cost $9 and tickets for adults cost $12. On a certain day a theater makes $150 in ticket sales write an equation to model the situation be sure to identify what your...
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23d

#### Minimize and maximize profit

Minimize and maximize p=5x+5y subject to the following constraints:2x+y≤10x+2y≤8x,y≤0

24d

#### Linear Algebra Question

Let X=[ -6 -9 ] 7 0 Give an example of two 2x2 matrices A and B, neither of which is the identity matrix, such that AB=X.

10/16/19

#### Determining the type of triangle given 3 lines

Determine the type of triangle that is formed by the lines x+y=11, x-y=1 and x-3y=3. Justify your decision?

10/14/19

#### Linear Algebra for Computer Science

What type of linear map is the following matrix? -1 0 0 -1

10/14/19

#### Linear Algebra for Computer Science

Find matrices C and D, both having rank greater such that the product of CD has rank zero?

10/14/19

#### Linear Algebra for Computer Science

Let 2 square matrices M and N each have rank 1. What can you say about the rank of MN?

10/14/19

#### Linear Algebra for Computer Science

Let M and N be 2x2 matrices and each is rank 1. What can you say about the renal of M+N?

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