1,965 Answered Questions for the topic linear algebra

03/23/18

VECTOR QUESTION
A triangle in space is defined by the points P = (1,1,2), Q = (−1,0,3) and R = (2,1,−1).   Find a vector form and the parametric equations for the equation of the line passingthrough P and... more
Follows • 2
Expert Answers •1
Linear Algebra Vector Dot And Cross Product

03/16/18

Use properties of the cross product to calculate the following:
Use properties of the cross product to calculate the following:   (a) (e1+e2)×(e1×e2) =   (b) 3e3×(e3+e2) =
Follows • 2
Expert Answers •1
Linear Algebra

02/19/18

If T: R^2 to R^3 is a linear transformation satisfying T(1,1)=(8,3,1) and T(1,-1) = (4,1,5)
what is the first, second and third component of T(3,1)?
Follows • 2
Expert Answers •1

02/18/18

Solving 3 Equations with 3 Unknowns (using gauss method)
x-y-z=1 x+3y+3z=-1 x+y+z=0
Follows • 3
Expert Answers •2
Linear Algebra

02/18/18

w = {( x , y , 5x -6y) : x and y are real numbers } is subspace of V= R³
 How we can prove that is a subspace ?
Follows • 2
Expert Answers •1
Linear Algebra

02/17/18

Linear Independence of vectors. Dont understand this solution
Show whether the following three vectors are linearly independent or not   V := C(R);  f1(x) = ex; f2(x) = e3x; f3(x) = x(x−1)   Solution:   af1 + bf2 + cf3 = 0   af1(x) + bf2(x) + cf3(x) =... more
Follows • 2
Expert Answers •2
Linear Algebra Pre Calculus Functions

02/11/18

it is asking to plot the point (3, f(3))
This is a function of x and is asking to plot this point but I am confused.
Follows • 1
Expert Answers •1

01/31/18

Please Formulate An Equation
Steve is two years older than Marvin, Five years ago the sum of their ages was 10 years more than Steve's present age. How old was Marvin 5 years ago?
Follows • 2
Expert Answers •1

01/31/18

Formulate the equation and solve the problem
Steve is two years older than Marvin, Five years ago the sum of their ages was 10 years more than Steve's present age. How old was Marvin 5 years ago?
Follows • 2
Expert Answers •1

01/30/18

I need help in finding the rate.
Luis can run 10 kph faster than Greta. One day,each of them left their house and ran towards each other. If the distance between them was 43.5 km and they met in 45 minutes, what was their rate?
Follows • 2
Expert Answers •1
Linear Algebra

01/23/18

Let ||v|| = 2 and ||w|| = 4 and w · v = 2. Compute ||2v + 17w||.
might help to use dot product and cauchy schwartz inequality
Follows • 2
Expert Answers •1
Linear Algebra

01/20/18

Are these vectors linearly independent or dependent ?
( 1, -1, 2 ) ( 2,0,1) ( -1, 2, -1  )    Is there a way to figure it out by looking at them instead of the matrix way ? 
Follows • 2
Expert Answers •2
Linear Algebra

01/18/18

Determine the missing coordinate in the ordered pair(4,?) so that it will satisfy the given equation.
2x+y=2  please help  
Follows • 2
Expert Answers •1
Linear Algebra

01/03/18

How to know if a subspace is a subspace
Given the following vectors in R3, that is: 𝑣1 = (1,2, −1), 𝑣2 = (0,1,1), 𝑣3 = (−1, −4,2) a. Find a basis, the dimension and Cartesian equations of the subspace generated by the above three... more
Follows • 2
Expert Answers •1
Linear Algebra

12/10/17

Prove if each of the following transformations is linear or non-linear.
E(x,y) = (x+2, y-3)   and    F(x,y) = 2y-x
Follows • 2
Expert Answers •1
Linear Algebra

11/15/17

Linear Algebra Question
H={[a,b,c,d]: a+3b=c, b+c+a=d}   Show the subset H is a subspace or give a counter example   I am very confused can someone help
Follows • 1
Expert Answers •1
Linear Algebra Sets

11/12/17

Determine if a set is a subspace.
Determine whether the given set is a subspace of P3. Explain why.  A = {p(t) = at^3+bt} Where a and b are both elements of the Reals. 
Follows • 2
Expert Answers •1
Linear Algebra Matrix Determinant

11/06/17

Finding det of a matrix after row operations.
Given a 4x4 matrix where R1: a b c d, R2: e f g h, R3: i j k l, R4: m n o p. We know that the determinant of this matrix is 9. What would the new determinant be if the matrix was transformed into... more
Follows • 2
Expert Answers •1
Linear Algebra

11/01/17

Linear algebra
How to determine whether the vectors u:(1,-1,4) , v:(-2,1,3) , w:(4,-3,5) span R^3     ???
Follows • 2
Expert Answers •1
Linear Algebra Addition Property

10/11/17

What operator preserves the addition?
  Per example, these are operators that do not preserve the addition:   Ln (a+b) is not = ln a + ln blike (a+b)^3 is not = a^3 + b^3Maybe it has something with linear algebra since this question... more
Follows • 2
Expert Answers •1

10/01/17

s(t) = 6000 - 500t when the domain is 2 and 7
Please Help! An approximate linear model that gives the remaining distance, in miles, a plane must travel from San Diego to Brussels is given by the function: s(t) = 6000 - 500t (12hrs) where s(t)... more
Follows • 3
Expert Answers •1
Linear Algebra Math

09/29/17

Linear Algebra Question
Let T: R2→R2 be the linear transformation that first rotates points clockwise through 30∘ and then reflects points through the line y=x. Find the standard matrix A for T.   A = [] ?
Follows • 2
Expert Answers •1
Linear Algebra Math Math Help Vectors

09/23/17

Assume u4 is not a linear combination of {u1,u2,u3}
Assume u4 is not a linear combination of {u1,u2,u3}   A. {u1,u2,u3,u4} is never a linearly dependent set of vectors. B. {u1,u2,u3,u4} could be a linearly independent or linearly dependent set of... more
Follows • 2
Expert Answers •1
Linear Algebra

09/12/17

How do I prove this is a subspace ?
Prove that a subset W of a vector space V is a subspace of V if and only if W ≠empty and whenever a∈ F and x,y ∈W then ax∈W and x+y∈W
Follows • 1
Expert Answers •1
Linear Algebra Math College Algebra Proof

09/10/17

How do I prove that ax+by+cx=dx+ey?
x,y,z ∈ ℝ3   and  x+y+3z=0   How do I prove ax+by+cz=dx+ey, if d and e are real numbers chosen to fit the equation? Thank you very much if you can help me! 
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.