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How do you solve for this matrix. X*X^t=0? What matrix times its tranpose is zero? If we use the usual notation: A_{i,j} for the element at the i-th row and j-th column then, if we put: A = X X^(T) ----> A_{i,j} = X_{i,k}[X^(T)]_{k,j} = X_{i,k}X_{j,k} her...

18 years ago

min 2x+y subject to: x+y+z=1 and y^2+z^2=4 Any help would greatly be apprecaited. y^2+z^2=4 ---> put y = 2 cos(theta) and z = 2 sin(theta) x+y+z=1 ----> x = 1-2(cos(theta) + sin(theta)) 2x + y = 2 - 2 cos(theta) - 4 sin(theta) It's not difficult to find t...

18 years ago

So a crystallization experiment was performed using an impure sample of biphenly, it weights 0.5g and contains about 5% impurity. Benzene is used as the solvent but after crystallization only about 0.02g were found. If everything was performed correctly,...

18 years ago

What did Robespierre mean when he stated "Pity is treason" ?

15 years ago

Imagine that the Earth's axis were tilted parallel to the ecliptic plan like that of the planet Uranus. Describe how the seasons would be different in this scenario than what we currently experience.

15 years ago

Do people wear seatbelts to protect themselves from speed or acceleration?

15 years ago

Suppose that the proportions of blood phenotypes in a particular population are a follows: A = .42 B = .10 AB = .04 O = .44 Assuming that the phenotypes of two randomly selected indiviuals are independent of one another, what is the probablility that both...

15 years ago

find the measure of an anGle if five times the measure of its complement is 24 derees less than twice the measure of its supplement. What is the equation? What is the measure?

15 years ago

A photon of which color of light carries the least energy. Red Yellow Green Blue All photons have the same energy.

15 years ago

In the film, "A Face in the Crowd", what is Elia Kazan trying to say about the commodification of these populist ideas and their use as a tool in mass media?

15 years ago

The hottest stars have surface temperatures of about 40,000 K. At what wavelength do they emit the most radiation? 7.2 x 10E-6 cm 2.5 x 10E-4 cm 4.0 x 10E-2 cm 1.2 x 10E2 cm 1.4 x 10E6 cm

15 years ago

How would I compare the orbital period of two stars knowing their distance apart in AU and their solar masses?

14 years ago

Suppose only 75% of all drivers in a certain state regularly wear aseat belt. A random sample of 500 drivers is selected. What is theprobability that a). Between 360 and 400 (inclusive) of the drivers in the sampleregularly wear a seat belt? b). Fewer tha...

14 years ago

Besides actin and myosin, what is another example of a Contractile Protein? If you could tell me about its function too, that would help too. Thanks

14 years ago

Which of the following distance measuring techniques works to measure distances to other galaxies beyond the Milky Way? CHECK ALL THAT APPLY A) Hubble's Law B) main sequence stars C) Cepheid variable stars D) parallax E) radar ranging F) galaxy rotation G...

14 years ago

Looking at a diagram of cortisone, where are all the stereocenters? I know there are 6 of them, I just don't know where they are in the structure. Sorry I can't provide a diagram, but I'm sure they can be found online.

14 years ago

So I've been working on this online homework problem and got it wrong 8 times. I need help. Here's the question: 1,2-diaminoethane, H2N-CH2-CH2-NH2, is used extensively in the synthesis of compounds containing transition-metal complexes in water. If pK_b1...

14 years ago

Solve the equation in the given Domain: 1-cos theta/ sin theta = sqr3, 0degrees <or equal to theta < 369 degrees cos4x + cos 2x =0, 0<or equal to x < pi

13 years ago

Calculate the pH of the resultant solution of mixing together two solutions of 2 L of 1.0 M acetic acid, 0.5 L of 1.0 M sodium acetate and then adding 8 g of solid NaOH (MW = 40.0 g/mole).

12 years ago

Sampling Distribution Complete solutions and illustrations are required. 3.The mean systolic blood pressure of normal adults is 120 millimeters of mercury (mm Hg) and the standard deviation is 5.6. Assume that the variable is normally distributed. a.If an...

12 years ago

What average force is required to stop a 920kg car in 7.7s if the car is traveling at 83km/h ?

10 years ago

A circular plate has a diameter of 6 inches. A pancake in the center of the plate has a radius of 2 inches. How much of the plate is not covered? Use pi as 3.14.

10 years ago

Assuming a warm front is moving into the area, there is a stignant (non moving) cold air mass around New York, what type of precipitation might be expect? How long might it last?

10 years ago

Solve. x+2/8 + 1 = 4x/2

10 years ago

20(B- 15) FOR B = 19

10 years ago

If the study had included these data, would this change the model relating average body weight and average pulse rate. -----Avg Body Weight----Avg Pulse Rate cat--------1-----------------250 dog--------2.5---------------265

9 years ago

How do i write a profit of $40 as an integer

9 years ago

How many milliliters of an aqueous solution of 0.172 M silver fluoride is needed to obtain 12.1 grams of the salt?

8 years ago

A 334-mL cylinder for use in chemistry lectures contains 5.225 g of helium at 23 C. How many grams of helium must be releasedto reduce the pressure to 75 atm assuming ideal gas behavior?

7 years ago

Ratio 132 to89

7 years ago

5.) Simone owns a candy store and wishes to mix strawberry candy worth $2.48 per pound with chocolate candy worth $3.50 per pound to form 17 pounds of a mixture worth $2.96 per pound. Write and solve a system of linear equations to find how many pounds of...

4 years ago

A bag contains 4 white marbles, 5 red marbles, and 9 blue marbles. If a marble is drawn from the bag, replaced, and another marble is drawn, what is the probability of drawing first a white marble, and then a blue marble? A bag contains 5 green marbles, 9...

4 years ago

A bag contains 8 red marbles, 5 white marbles, and 6 blue marbles. You draw 4 marbles out at random, without replacement. Find the following probabilities and round to 4 decimal places. a. The probability that all the marbles are red is b. The probability...

4 years ago

A quick quiz consists of a multiple-choice question with 5 possible answers followed by a multiple-choice question with 5 possible answers. If both questions are answered with random guesses, find the probability that both responses are correct. Report th...

4 years ago

The table summarizes results from 986 pedestrian deaths that were caused by automobile accidents. Pedestrian Deaths Driver Intoxicated? Pedestrian Intoxicated? Yes No Yes 48 72 No 252 614 If one of the pedestrian deaths is randomly selected, find the prob...

4 years ago

A store manager gathers some demographic information from the store's customers. The following chart summarizes the age-related information they collected: Age Number of Customers <20 54 20−29 80 30−39 76 40−49 59 50−59 94 ≥60 68 One customer is chosen at...

4 years ago

What is the difference between an in-text citation and works cited page? Please explain the differences for me I am confused.

3 years ago

A DEA Form 222 is required in all of the following scenarios EXCEP

1 year ago

Please explain two challenges you face while taking surveys

1 year ago

Well I found the answer finally. They were where all the bold and dashed wedges were on the structure.

14 years ago

You need to capitalize John Grisham as it is a NAME of a person. Next you must capitalize "The Street Lawyer" because it is the NAME of a book

12 years ago

Wow, I have this assignment too and I can't seem to crack it either. PLEASE HELP! :(

11 years ago

Is the answer 82.5 or 91 percent?

9 years ago

Which of the following is Not critical when developing questions for the interview

9 years ago

can you help me please yes or no? its urgent

4 years ago

idiots

4 years ago

1. 170.668 2. -6.250 3. 16 4 51,291.57

4 years ago

Hopefully people still doing dis ion wanna no work

3 years ago

Duh FDA

3 years ago

Who making thing google/safari page for people to put answers its been going on for 8 years

3 years ago

Nah fax

2 years ago