 Lv 43,796 points

• ### Looking for a blog about a divorced mom who lives in Washington state with 4 kids?

I used to read a blog ( a .com domain name) about a divorced mom with short brown hair who lived on an island off of Washington state. I think she had four kids and cats. Does anyone know which blog I'm talking about? Thanks

• ### What is that music video with the guy & girl that bring each other letters?

What is that music video with the girl who drives to New York and misses the guy because he's driving out to the country to see her? And they bring each other letters? Thanks

• ### What kind of earrings can you choose from for ear lobe piercings?

When you have your ear lobe pierced, what kinds of earrings can you choose from? I don't want some boring little fake gemstone earrings if you know what I mean. Thanks!

• ### Find the determinant of a matrix B when A is a 4x4 matrix with a neg. determinant (Linear Algebra)?

I am looking for hints to help me solve this problem. Thanks.

Let A be a 4x4 orthogonal matrix whose determinant is negative. What is the value of |B|, where B = (2*adj(A))^(-1)?

• ### Show that the set of all vectors in R^n that are orthogonal to both u & v is a subspace of R^n -linear algebra

UGH. I'm sick of linear algebra and so ready for this semester to be over.

My teacher writes homework questions in a way that I CANNOT understand. Can you help me understand this question:

Suppose that u and v are two linearly independent vectors in R^n, n greater than or equal to 3.

Show that the set of all vectors in R^n that are orthogonal to both u & v is a subspace of R^n.

• ### Show that the determinant of the matrix C does not depend on x (Linear Algebra)?

How do I solve this problem? (Hints are appreciated, Thanks)

Show that the determinant of C, |C|, does not depend on x.

the matrix C =

sin(x), cos(x), 0

-cos(x) , sin(x), 0

(sin(x) - cos(x) ), (sin(x) + cos(x) ), 1

C is a 3x3 matrix with each element separated by a comma

• ### How can you tell if a vector is in the null space (Linear Algebra)?

How can you tell if a vector is in the null space of a matrix?

• ### Find a basis in R3 for the subspace (Linear Algebra)?

Hi, I can't remember how to do this type of problem. If someone could help me set it up I would appreciate it.

Find a basis in R3 for the subspace

x = 3 - t

y = -3 + t

z = 6 - 2*t

• ### Who is the girl Kanye West is singing about in "Homecoming"?

Is she real? Just curious. I think he says her name is Wendy.

• ### How can I show that a scalar times a vector is within a subspace? Linear Algebra?

How can I show that a scalar times the vector u = ( |x| + |y| = |z| ) is within a subspace? I know I'm supposed to use scalar multiplication, any pointers to get me started ? Thanks

• ### How can a BCD counter have karnaugh maps if it doesn't have any inputs?

My assignment says to turn in the Karnaugh maps for a BCD counter, but how can a BCD counter have karnaugh maps if it doesn't have any inputs?

You just count using the clock signal, not using inputs. Help? Thanks

• ### Linear Algebra: Using Scalar Multiplication to prove that a set is within R2?

I'm studying for a linear algebra test, and I'm having a bit of trouble proving that a set is closed under Scalar Multiplication (I've got Vector Addition down fine).

Here's my example:

Show W = {(x, y) in R^2 : xy = | xy | } is closed under Scalar Multiplication.

I have this so far:

Let λ be a scalar.

Let the vector u = (u1, u2) in W, i.e. u1u2 = | u1u2 |

If you can help me figure out what's next, I will greatly appreciate it. Hopefully this will help me figure out subsequent problems. Thanks.

• ### Why is 11 an illegal input to an SR latch or flipflop? Digital Logic Electrical Engineering?

Why is 11 an illegal input to an SR latch or flipflop?

I don't understand this fact. Thanks.

• ### Linear Algebra: Help Solving a Matrix Equation?

If you have a question that asks:

Solve this matrix equation:

[# #] X = [# # # #]

[# #]        [# # # #]

(Where the # signs are actual integers)

how would I go about solving that equation? Supposedly the answer is actually another matrix. Thanks.

• ### Digital Logic (Electrical Engr.) Using state diagrams to design circuits Question?

Hey - I'm trying to use state diagrams to design a digital circuit. Quick question: If I have 2 inputs and 3 outputs, how many variables do I need on my Karnaugh maps?

I don't get it! Can anyone explain? Thanks

• ### How long does wet (canned) cat food last open and in the fridge?

I just found out yesterday that my cat Pumpkin has diabetes. :( I am feeding him prescription (expensive!!) canned cat food (wet cat food). How long will the can of food last if it is opened and I keep it in the fridge?

Thanks :( :(

• ### Canoeing trip cancelled because of rain, what now??

What else can I do outdoors in the rain? :(

• ### What can I do to improve my free sample website?

Hi. I have been working on a new design for my free sample website. http://loushrugged.com/

I need advice as to how I can improve its design, navigation, etc. Thanks! The best advice gets the 10 points.