Friday

August 26, 2016
Total # Posts: 795

**math 30**

Help please i need to write 4x^2 -y^2 -8x -4y +16 =0 in standard form.4x^2 -8x - y^2 -4y=-16 so 4(x^2 -2x +1)-(y^2-4y+4= -16 -4 +4 so 4(x-1)^2/-16 -(y-2)^2/-16 =1 so (x-1)^2/-4 -(y-2)^2/-16 so if I multiply everything by -1 it will get rid of my (-) on the left and I'm ...
*March 16, 2010*

**conics**

The graph of y=x^2 is reflected in the x-axis, then stretched vertically by a factor of 2, and then translated 3 units to the left and 1 unit down. I need to write the equation of this parabola in standard and general form. I have 4 other questions so could someone please show...
*March 15, 2010*

**College Physics**

A 3400 kg open railroad car coasts along with a constant speed of 7.50 m/s on a level track. Snow begins to fall vertically and fills the car at a rate of 5.10 kg/min.Ignoring friction with the tracks, what is the speed of the car after 85.0 min ?
*March 14, 2010*

**math 12 logarithms**

I need to express log base 5 sqrt5 =0.5 in exponential form. Would it be 5^0.5 =sqrt5. I'm not really understanding this unit very well. Any explaination would be greatly appreciated.
*March 11, 2010*

**math 12 logarithms**

How would I go about proving 1/log a +1/log a = 1/log base 100 a. Any help would be greatly appreciate. Thanks
*March 11, 2010*

**trig **

I don't understand how to do this type of question? If 9cos^2 theta +3cos theta=0, where 90 degrees <theta<180 degrees, what is the value of theta, correct to the nearest tenth of a degree. Could someone please explain. Thanks
*March 10, 2010*

**trig **

Solve the following for x, where 0 < x < 2 pi. 2 cos^2 x + cos x = 1
*March 8, 2010*

**Trigonometry**

Where does the graph of y = tan theta intersects the graph of y = -1.
*March 7, 2010*

**Trigonometry**

Where does the graph of y = tan theta intersect the graph of y = -1 where n is any integer?
*March 7, 2010*

**trig math 30**

Find the exact value of cos 8 degrees cos 38 degrees + sin 8 degrees sin 38 degrees
*March 6, 2010*

**math 30 Trig**

If sin theta = -7/8, then the value of 1/cot theta in the interval 3pi/2 <theta <2pi is:
*March 6, 2010*

**math 30 Trig**

A central angle subtends an arc of 35 cm. If the radius of the circle is 12 cm, what is the measure of the central angle?
*March 6, 2010*

**College Physics**

A projectile is fired at an upward angle of 55.0 degrees from the top of a 230m cliff with a speed of 180m/s.What will be its speed when it strikes the ground below? (Use conservation of energy.)
*February 25, 2010*

**Math**

If Angel plants the same number of flowers in each of 5 rows, he will have none left over. If he plants 1 in the first row and then 1 more in each row than he did in the previous row, he will plant flowers in only 4 rows. how many flowers does he have?
*February 18, 2010*

**College Physics**

What will a spring scale read for the weight of a 73 kg woman in an elevator that moves upward with constant speed of 5.4 m/s?
*February 16, 2010*

**PSY**

what things can a LEADER do to help prevent or "break through" groupthink?
*February 12, 2010*

**college**

what things can a LEADER do to help prevent or "break through" groupthink?
*February 12, 2010*

**PSy**

Sorry
*February 12, 2010*

**College**

In what ways and in what situations can increased diversity increase NEGATIVE conflicts and impede team effectiveness? What other factors can interfere with productive team experiences?
*February 12, 2010*

**College Physics**

COrrection on the problem. Its suppose to be 24 degree incline. I did mu= 1/2tan(24degrees)= .222 .222 was not the right answer for some reason. Can you help please?
*February 11, 2010*

**College Physics**

A child slides down a slide with a 24 incline, and at the bottom her speed is precisely half what it would have been if the slide had been frictionless.Calculate the coefficient of kinetic friction between the slide and the child.
*February 11, 2010*

**History**

Compare the interaction between the Japanese, New World and Europeans. How did the Europeans treat the people of Japan and the New World? Who was treated better? Why?
*February 11, 2010*

**8th grade science**

What is a vertical section of the ocean from it's surface to the ocean floor called?
*February 4, 2010*

**science**

which causes winter snow and summer rain at higher latitude?
*January 21, 2010*

**math**

the area or peur is 3 4/25 times the area of purgatory the area of purgatory is 157000 what is the area of peur
*January 14, 2010*

**Algebra**

Let U = {u, n, i, t, e} A = {n, i, t} B = {n, e} C = {u, n, i, t, e} D = {u, e} Find each of the following: (a) A ¡ä B (b) C ¡å D (c) ¡ÂD¡Â (d) ¡ÂA ¡å D¡Â (e) B ¡ä ¡ÂC&...
*January 11, 2010*

**Algebra**

How many elements are in the Cartesian product D x E?
*January 11, 2010*

**Algebra**

List all the subsets of {m, a, t, h}.
*January 11, 2010*

**child development and human behavior**

Cognition refers to what.
*December 28, 2009*

**social studies psychology**

Observing what a person does under carefully controlled circumstances is a main feature of what? 1.the Thematic Apperception Test 2.behavioral assessment 3.Rorschach methods 4.the MMPI-2
*December 21, 2009*

**psychology**

In psychology, the study of personality focuses on what? change. stability. external factors. learned factors.
*December 20, 2009*

**Math**

The computer club invested $2200, part at 4.5% interest and the rest at 7%. The total annuel interest earned was $144. How much was invested at each rate?
*December 17, 2009*

**physics**

The driver of a 1024 kg truck traveling 32.6 m/s North on I-77 has to make a sudden stop. If it requires a distance of 57.1 m for the truck to stop, use conservation of energy to find the net force acting on the truck.
*December 9, 2009*

**physics**

A softball (350g) is thrown with an initial speed of 23 m/s straight upward. What is the maximum potential energy the softball can have?
*December 9, 2009*

**physical science**

How much time should be allowed for a 392-km car trip if the car will be traveling at 120 km/h?
*December 4, 2009*

**Physics**

What is the potential energy of a 3kg ball that is on the ground. -do i do mgh? (9.8)(3kg) ?
*November 22, 2009*

**Science**

1) The vector sum of three vectors gives a resultant equal to zero. what can you say about the vectors? 2) Vector is 3.00 units in length and points along the positive x-axis. Vector is 4.00 units in length and points along the negative y-axis.Use graphical methods to find the...
*November 19, 2009*

**stats**

An automobile repair shop has determined that the average service time on an automobile is 2 hours with a standard deviation of 32 minutes. A random sample of 64 out of 400 services is selected. What is the probability that this sample will have a mean service time greater ...
*November 11, 2009*

**statistics**

In a local university,40% of the students live in the dormitories. A random sample of 80 students is selected for a particular study. What is the probability that the sample proportion (the proportion living in the dormitories) is between 0.30 and 0.50?
*November 11, 2009*

**math**

A hammer thrower releases the hammer after reaching an angular velocity of 14.9 rad/s. If the hammer is 1.6m from the shoulder joint, what is the linear velocity at release?
*November 4, 2009*

**english**

Hi....I'm having trouble finding a song that shares a connection or a relationship to Hamlets "to be or not to be" sililoquy. Do you have any suggestions? Thankyou
*November 4, 2009*

**math**

Mrs leuenberger ran the same maraton but since her husband was hunting and she couldnt find a babysitter she had to carry her two daughter in her arms They weigh 40 pounds and 55 pounds Mrs Leuenberger weighs 145 pounds How much work pound did Mrs Leuenberger expend if she ran...
*October 25, 2009*

**Science**

Matings between hairless & normal dogs always produce hairless & normal offspring in a 1:1 ratio. In matings of two hairless dogs, hairless & normal dogs are always produced in a 2:1 ratio. How can these results be explained?
*October 12, 2009*

**physics**

A magnetic field is perpendicular to the plane of a single turn circular coil. The magnitude of the field is changing so that the emf of 0.80 V and a current of 3.2 A are induced in the coil. The wire is then re-formed into a single turn square coil, which is used in the same ...
*October 8, 2009*

**Chemistry**

Determine the mass of each reactant needed to give 1.5 mol of HNO3 NO2(g)+H2O(l)---> HNO2(aq)+HNO3(aq)
*October 7, 2009*

**economics case analysis**

thank you so much for you've got the point. maybe i am noy familiar with the economic terms my teacher told me, so i have no idear how to finish it. you are so kind to enlight me! thabk you a million!
*October 4, 2009*

**Science**

How long would a day be in seconds if the Earth were rotating so fast that objects at the equator were apparently weightless?
*October 2, 2009*

**5th grade**

estimate 5,602 - 2,344
*September 29, 2009*

**biology**

what is heterotrophic Hypothesis? please explain well that i can understand because i am doing a research paper on it and i have no clue what it means
*September 28, 2009*

**Accounting**

Please prepare and post your response to the following question no later than Wednesday of this week: A major network is launching a reality program called The Accountant. A group of recent accounting graduates will be competing for a spot in a national accounting firm. What ...
*September 2, 2009*

**religion**

Gnostic claim Jesus could not have been human because all humans are evil what would the christian response be
*August 30, 2009*

**Ethics**

Which is true: most tribes operate gambling ventures or most tribes do not?
*August 16, 2009*

**business**

In what ways are expository essays similar to business communications?
*July 23, 2009*

**math**

At what rate would a 120-pound person burn calories while bicycling at 12 mi/h?
*July 3, 2009*

**math**

Sonia harvested 34 bushels of beans per acre from 44 acres in May and 38 bushels of beans per acre from 41 acres in June How many bushels of beans did Sonia harvest?
*June 28, 2009*

**math**

Eduando owned 6/7 of a family business. he sold 1/5 of the business to his son. What portion of the business does he still own?
*June 21, 2009*

**math**

Write the following as a common fraction or mixed number. 5.679
*June 21, 2009*

**math**

Write the following as a common fraction or mixed number. Write your answer in lowest terms. 0.44
*June 21, 2009*

**math**

Rochelle purchased an appliance that cost $815.56 with interest included. She paid $250 as a down payment and agreed to pay the remainder in 18 monthly payments. What amount will she be paying per month?
*June 21, 2009*

**math**

Shella practiced 1-1/2 hours Monday, 3-3/4 hours Tuesday, and 2-1/2 hours Wednesday. What is the total number of hours that she practiced?
*June 21, 2009*

**organic chemistry**

I can't figure out the answer please help. 1. Which of the following would you expect to have the weakest C-X bond? A)CH3Cl B)CH3CH2Br C)CH3F D)CH3CH2I E)(CH3)2CHBr 2. Which of the following haloalkanes would not undergo the reaction below? R-X + CH3S^ ----> CH3SR + X...
*June 18, 2009*

**french help please!**

woah u guys seem like best friends
*June 9, 2009*

**Chemistry**

WHat is the bond identified as if two covantley bonded atoms are identical?
*May 30, 2009*

**algebra**

1. y=3x^2+x-2 2. find an equation that has -5/2 and 6 as solutions
*May 15, 2009*

**CHEM**

For the reaction of HNO3 is this the reaction? Is the water liquid? 2HNO3(s)> 2NO2(g)+H2O(l)+ 1/2O2(g)
*April 30, 2009*

**Math**

math
*April 27, 2009*

**Math**

i want help
*April 27, 2009*

**Physics**

Three solid cylinder rods roll down a hill with the same linear speed. Rod R1 has a 1inch diamter, Rod R2 has a 2inch diameter, and Rod R3 has a 3inch diameter. They all have the same masses. Rank in order the rotational energies of R!, R2, and R3. a. E1 > E2 > E3 b. E3...
*April 22, 2009*

**Physics**

Three solid cylinder rods roll down a hill with the same linear speed. Rod R1 has a 1inch diamter, Rod R2 has a 2inch diameter, and Rod R3 has a 3inch diameter. They all have the same masses. Rank in order the rotational energies of R!, R2, and R3. a. E1 > E2 > E3 b. E3...
*April 22, 2009*

**PHYSICS**

A hollow tube (I = MR2) rolls without slipping along the surface. The ratio of its translational kinetic energy to its rotational kinetic energy is a. 1 b. 2 c. 3 d. 1/2 e. 1/3 I say A becasue both add up to get the total kinetic energy.
*April 22, 2009*

**Physics**

Three solid cylinder rods roll down a hill with the same linear speed. Rod R1 has a 1inch diamter, Rod R2 has a 2inch diameter, and Rod R3 has a 3inch diameter. They all have the same masses. Rank in order the rotational energies of R!, R2, and R3. a. E1 > E2 > E3 b. E3...
*April 22, 2009*

**Physics**

A cylinder and a solid disc are released from rest from the top of a ramp.They roll down the hill without slipping. Which statement iscorrect? a. The cylinder reaches the bottom first b. The disc reaches the bottom first c. They both reach the bottom at the same time d. Could ...
*April 21, 2009*

**law**

Suppose the statute of limitations for a particular state is 3 years and the age of majority in that state is 21. If you have medical records for a 13-year-old girl, how long should you maintain them? A. 3 years C. Until she’s 21 B. 8 years D. Until she’s 24 B
*April 20, 2009*

**law**

Suppose the statute of limitations for a particular state is 3 years and the age of majority in that state is 21. If you have medical records for a 13-year-old girl, how long should you maintain them? A. 3 years C. Until she’s 21 B. 8 years D. Until she’s 24 B
*April 20, 2009*

**health**

Thanks Andrew & Ms. Sue
*April 20, 2009*

**health**

A woman is brought into an emergency room after a severe automobile accident. She’s unconscious and badly injured. Her husband arrives at the emergency room at the same time as she arrives in the ambulance. The doctor explains the wife’s condition to her husband and ...
*April 20, 2009*

**health**

According to the AMA, what is a key reason behind a physician’s duty of confidentiality to a patient? A. The U.S. Constitution requires a physician’s confidentiality. B. The patient will feel more confident in disclosing information to the physician. C. If a ...
*April 18, 2009*

**Health**

Thanks
*April 18, 2009*

**Health**

Who is the only person who can authenticate the information in a patient’s medical record? A. The attending physician B. The attending nurse C. The medical facility that’s caring for the patient D. The person who creates the data in the record C
*April 18, 2009*

**math**

Y varies directly as X. When Y is 10, X is 15. Find Y, when X is 32. a. Can not be determined b. When X is 32 then Y = 165 c. When X = 32 then Y is; 21 1/3 d. When X is 32 then Y = 5
*April 16, 2009*

**Physcis**

In the process of starting up the car plant, a turbine accelerates from rest at 0.49 rad/s^2 .How long does it take to reach its 4400 rpm operating speed? How many revolutions does it make during this time? I got 940 s for the first part, but for the second part Do i use the ...
*April 16, 2009*

**math**

Y2 = 289 the 2 is to the second power a. Y = 289 b. Y = 144.5 c. Y = 18 d. Y= -17 and +17
*April 16, 2009*

**Physics**

Two pieces of paper are on a DVD movie disk. Paper A is farther from the center of the disk than Paper "B". The DVD disk starts to play and then starts to spin. Which statement is true? a. Paper "A" experiences a greater tangential acceleration than Paper &...
*April 15, 2009*

**Physics**

Two pieces of paper are on a DVD movie disk. Paper A is farther from the center of the disk than Paper "B". The DVD disk starts to play and then starts to spin. Which statement is true? a. Paper "A" experiences a greater tangential acceleration than Paper &...
*April 15, 2009*

**Calculus**

A ball is dropped from a height of 10 feet and bounces. Each bounce is ¨ú of the height of the bounce before. Thus, after the ball hits the floor for the first time, the ball rises to a height of 10(¨ú ) = 7.5 feet, and after it hits the second floor for ...
*April 15, 2009*

**Chem**

Which chloride should exhibit the most covalent type of bond? WHY? A) NaCl B) KCl C) BaCl2 D) BeCl2 E) CaCl2
*April 12, 2009*

**7th grade**

what is the answer for 3 times a number plus 15 divided by 2
*April 7, 2009*

**health**

The function of the sinoatrial node is to A. keep the heart beating. B. filter lymph. C. prevent blood from backing up into the atrium. D. divide the right and left sides of the heart. The sinoatrial node is also known as the pacemaker of the heart because it sets the pace of ...
*March 25, 2009*

**health**

The function of the sinoatrial node is to A. keep the heart beating. B. filter lymph. C. prevent blood from backing up into the atrium. D. divide the right and left sides of the heart. The sinoatrial node is also known as the pacemaker of the heart because it sets the pace of ...
*March 25, 2009*

**health**

A 60-year-old patient who comes to the emergency room with shortness of breath is experiencing A. dysphagia. C. pleural effusion. B. inspiration. D. dyspnea i think d
*March 25, 2009*

**health**

thanks
*March 25, 2009*

**health**

Is cholelithiasis inflammation of the bile duct?
*March 25, 2009*

**health**

which term means "blood on the chest"? hemothorax aerothorax pneumothorax gastrothorax i think (hemothorax) not sure, it means blood in the pleural cavity
*March 25, 2009*

**science**

A ball is traveling at a constant velocity of 50 m/s and has been traveling for over 2 minutes. What is the ball’s acceleration
*March 8, 2009*

**SAT Essay**

Good website for developing your vocabulary is wikiwordy Provides SAT words and lots of example sentences to help understand how they are used in context. Hope that helps!
*March 1, 2009*

**Math/Standard and scientific notation**

Express each measure in standard form. (One more thing by the way you need this few prefixes) Tera= 10 to the 12th power Giga= 10 to the 9th power Mega= 10 to the 6th power Kilo= 10 to the 3rd power Pico= 10 to the -12th power Nano= 10 to the -9th power Micro= 10 to the -6th ...
*February 25, 2009*

**Accounting**

When reviewing a financial report, why should information be reliable, relevant, consistent, and comparable? In other words, why are these accounting characteristics important? What kinds of problems could be created if a financial report is not reliable, relevant, consistent...
*February 18, 2009*

**density of Magnesium!**

sorry yes they were in pm I corrected my units: m= 2* 24.30g/6.022*10^23 = 8.07*10^-23 v= l^2*h v=(3.2*10^-8cm)^2* 5.2*10^-8cm v=5.32*10^-23cm d=m/v d= 8.07*10^-23/5.32*10^-23 d= 1.52cm > it's still 1.52 where as the correct answer is suppose to be 1.75g/cm^3. Is my ...
*February 6, 2009*

**density of Magnesium!**

Magnesium crstallizes in the hcp arrangment. The dimensions of the unit cell are height 520om, length on an edge, 320. Calculate the density of Mg (s) and compare it with the measured value of 1.738 g/cm^3 this is what i did : m= 2* 24.30g/6.022*10^23 = 8.07*10^-23 v= l^2*h v...
*February 6, 2009*