1,975 Answered Questions for the topic linear algebra

Linear Algebra

01/02/20

How to tell if these lines are perpendicular to each other?
l1: 7x + 2y - 3 = 0l2: l(t) = (1 - t) * Matrix [1 0] + t * Matrix [-6 -2] where both matrices are 2x1.Thanks!
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Linear Algebra

01/01/20

I really don’t understand this, please help ASAP! :(
Write a linear equation through the point (-3, -2) with a y-intercept of 3.
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12/19/19

Is this a linear or quadratic function?
y = (x+1)(6x-6)-6x^2 Linear or quadratic? What's the linear term? Constant term?
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Linear Algebra Precalculus Mathematics

12/17/19

what is the largest area that can be enclosed
"A homeowner has a 100 feet of fencing and wants to section off a corner of her yard for a chicken pin. She will enclose a Rectangular plot that using the current fencing in the corner. what is... more
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Linear Algebra Algebra 1 Algebra 2 Algebra

12/15/19

What is the slope of a line passing through points (-7,5) and (5,-3)?
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Linear Algebra

12/06/19

Determine whether the graphs of the given equations are parallel, perpendicular, or neither. Explain.
y=4x+5-4x+y=-13
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Linear Algebra

12/06/19

keiko is on her way home in her car.her drive is 24 miles long . she has finished two-thirds of the drive so far. how far has she driven
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Linear Algebra Math Algebra 1 Algebra 2

12/05/19

Can someone help me solve this linear programming problem?
A calculator company produces a scientific calculator and a graphing calculator. There is an expected demand of at least 60 scientific and 80 graphing calculators each day. Because of limitations... more
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Linear Algebra Algebra 1 Algebra 2 Prealgebra

12/05/19

The sum of two numbers is 120. Three times their difference is 48. What are the numbers?
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Linear Algebra

12/04/19

Help with linear algebra
is the function below a linear transformation? why or why not? T:C3 ---> C2, T([x1][x2][x3]) = [-1x1-7x2+3x3],[-1x1+8x3-5]
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12/04/19

algebra 1 problem solving
Norman and Suzanne own 27 shares of a fast food restaurant stock and 61 shares of a toy company stock. At the close of the markets on a particular day in​ 2004, their stock portfolio consisting of... more
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Linear Algebra

12/03/19

Linear Algebra Question

. Let 𝑊 be the set of all matrices of the following form with real numbers 𝑎, 𝑏, 𝑐, 𝑑. [ 𝑎 𝑏 0 𝐴 = | 𝑏 𝑐 𝑑 0 𝑑 𝑎 ] a) Determine whether the set 𝑊 is a subspace of 𝑀33 (vector... more
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12/01/19

How to solve: A movie theater has a seating capacity of 355. The theater charges $5.00 for children, $7.00 for students, and $12.00 of adults.
A movie theater has a seating capacity of 355. The theater charges $5.00 for children, $7.00 for students, and $12.00 of adults. There are half as many adults as there are children. If the total... more
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Linear Algebra

12/01/19

cost for each pound of jelly beans. cost for each pound of almonds
A store is having a sale on jelly beans and almonds. For 9 pounds of jelly beans and 7 pounds of almonds, the total cost is $35. For 3 pounds of jelly beans and 5 pounds of almonds, the total cost... more
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Linear Algebra Math

11/26/19

Linear Algebra Question
Let A =-17 -1510 8Find a matrix S, a diagonal matrix D, and S^-1 such that A=SDS^-1.
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Linear Algebra Algebra 1 Algebra Word Problem

11/20/19

Linear equation word problem
Jasmine has been working to save money and wants to have an equation to model the amount of money in her bank account. She has been depositing $175 a month consistently, she doesn’t remember how... more
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Linear Algebra

11/19/19

Find all values of a that make det(A)=0.
A={[a,a,4],[3,-2,-2],[5,1,a]}Each set within the [ ] are the columns of matrix A.
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Linear Algebra

11/19/19

Find the area of the parallelogram with vertices at (3,−4), (6,5), (−9,−15), and (−6,−6).
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Linear Algebra

11/14/19

i need equation answers
What is the value of x in the equation , when y = 3? is their a answer
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Linear Algebra Math Calculus Mathematics

11/13/19

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(... more
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Linear Algebra

11/13/19

Prove that if w⃗ is orthogonal to each of the vectors in the set S = {⃗v1, ⃗v2, . . . , ⃗vm}, then w⃗ is also orthogonal to each of the vectors in the subspace W = SpanS of V .
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Linear Algebra

11/13/19

If the vectors ⃗u =(1 2) and ⃗v =(2 −4) are orthogonal with respect to the weighted inner product ⟨⃗u, ⃗v⟩ = w1u1v1 + w2u2v2, what must be true about the weights w1, w2?
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Linear Algebra Math Calculus

11/10/19

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... more
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Linear Algebra Math Science Calculus

11/10/19

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... more
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Linear Algebra

11/05/19

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... more
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