Thursday

September 18, 2014

September 18, 2014

Total # Posts: 864

**Math**

Could someone give me an example of a linear eqution using elimination to solve the systems of equations?
*January 2, 2012*

**science**

atoms in the same column on the periodic table have?
*January 1, 2012*

**math**

thanks
*December 26, 2011*

**math**

.004999 to the nearest hundreth
*December 26, 2011*

**Alegbra/ Chemistry**

When I tried your equations I did not receive the right values.
*December 15, 2011*

**Alegbra/ Chemistry**

Thank you so much.
*December 15, 2011*

**Alegbra/ Chemistry**

Q (ft3/min) : 3.9, 7.9, 11.8, 15.7, 19.6, 23.6, 27.5, 31.4, 35.3, 39.3 Delta P (psi): 0.13, 0.52, 1.18, 2.09, 3.27, 4.71, 6.41, 8.37, 10.59, 13.08 My professor gave the information above and wants us to come up with a linear equation that relates Q and square root of delta P. ...
*December 15, 2011*

**Chemistry **

I'm not sure how to find a linear equation for this problem. One common flow measurement device is the orifice meter, which consists of a disk with a machined hole. It is placed as an obstruction to flow in a pipe, causing pressure drop to occur as the fluid in the pipe ...
*December 14, 2011*

**Science**

What is the Range of Temperature of LukeWarm Water in Farenheit. Like 72 degrees to 89 degrees. Somewhat like that. please Help.
*December 13, 2011*

**history**

It's D.
*December 12, 2011*

**Geometry**

The Design for a Mural is 16 in. Wide and 9 in High. What are the Dimensions of the largest possible complete mural that can be painted on a wall 24 ft wide by 14 ft wide? And Can you Please Explain. I understood how to do it. but which height or width will fill the space ...
*December 12, 2011*

**Physics**

A 0.250 kg block on a vertical spring with a spring constant of 4.09 × 10 3 N/m is pushed downward, compressing the spring 0.0900 m. When released, the block leaves the spring and travels upward vertically. The acceleration of gravity is 9.81 m/s 2 . How high does it ...
*December 11, 2011*

**Physics**

A spring has a force constant of 546.5 N/m. Find the potential energy stored in the spring when the spring is a) stretched 4.18 cm from equilibrium. Answer in units of J
*December 11, 2011*

**Physics**

When a rattlesnake strikes, its head accelerates from rest to a speed of 26 m/s in 0.3 s seconds. Assume for simplicity that the only moving part of the snake is its head of mass 100 g. How much (average) power does the rattlesnake need to accelerate its head that fast? Answer...
*December 11, 2011*

**Physics**

A student, late for class, ran up some stairs between landings. The landings are 8.2 m apart. The student has a mass of 54.1 kg and it took 7 s to do the run. The acceleration of gravity is 9.8 m/s 2 . What is the average power that the student was generating during the run?
*December 8, 2011*

**math**

To win $1 million, you must draw two cards whose sum is nine, from a stack of cards numbered 1 through 10. After the first draw, you replace the card and shuffle the stack again for the second draw. What is the chance your two cards will have a sum of nine?
*December 8, 2011*

**Physics**

Suppose that a simple pendulum consists of a small 71.8 g bob at the end of a cord of negligible mass. If the angle è between the cord and the vertical is given by è = (0.0465 rad) cos[(6.52 rad/s) t + ö], what are (a) the pendulum's length and (b) its ...
*December 5, 2011*

**Physics**

Please guide me in the right direction, am so confused with this problem. A pendulum of length L is caused to swing by releasing it at an initial angle theta0 from the vertical. Because of air drag and friction in the mounting, the pendulum will eventually stop ...
*November 30, 2011*

**Science-chemistry**

A compound is found to have 56.4% potassium, 8.7% carbon, and 34.9% oxygen. What is the empirical formula?
*November 29, 2011*

**Cedar High school**

A compound is found to have 56.4% potassium, 8.7% carbon, and 34.9% oxygen. What is the empirical formula?
*November 29, 2011*

**geometry**

If the area of a trapezoid is 209 square yards and the bases are 15 yards and 23 yards. What is the height of the trapezoid?
*November 28, 2011*

**Chemistry **

I'm confused on this problem A gaseous mixture inside a rigid steel vessel contains 75% CO2 and 25% H2O by volume at 175 degrees C and 225 kPa. The mixture is then cooled to 0 degrees C, thereby condensing the water vapor. What is the pressure of the CO2 at 0 degrees C? (...
*November 27, 2011*

**Core mathematics**

Reiny can u answer my other question please it is the latest one about the charity swim
*November 26, 2011*

**Core mathematics**

i think
*November 26, 2011*

**Core mathematics**

1 = 6.16 and 7= 43.12
*November 26, 2011*

**math**

thank you so much!
*November 26, 2011*

**math**

In a charity swim,Jim swam 1200m and Sue 2km. What is the ration of Jim's distance to Sue's? give the ration in the simplest form.
*November 26, 2011*

**math**

does not matter anymore i figured it out please just answer my other one x
*November 26, 2011*

**math**

A sum of money is divided between three women A,B and C in the ration 2:3:5.If B receives £2.40 less than C, how much does each receive?
*November 26, 2011*

**Math**

OK that's what I thought but the textbook says the answer is p>13 which makes no sense. Thanks
*November 12, 2011*

**Math**

3P+(2-3P)>28 show work with answer please because I don't understand how to do this inequality.
*November 12, 2011*

**Calculus **

I seriously do not understand anything about this problem Please help. The equation of an ellipse centered at the origin is (x^2/a^2) + (y^2/b^2)=1 The area of the upper half of the ellipse can be determined by finding the area between the ellipse and the x-axis (y=O). The ...
*November 8, 2011*

**Math**

yes
*November 7, 2011*

**Equation Help**

In our text book the following equation is given: P=(pm - p)g * R where P is the pressure drop R is the manometer reading pm is the density of the manometer fluid p is the density of the process fluid in the pipe g is the acceleration do due to gravity Then our professor told ...
*November 3, 2011*

**VBA EXCEL**

I was wondering I have 3 input boxes and with one of them I need the information put into this equation. What type of VBA CODE do I use to put this information in the equation is w=1/tp Where w is input frequency Tp is process time constant I know that I say dim w as single ...
*November 1, 2011*

**Excel VBA **

Am confused for this class am taking we had to design serval procedures that do different things: 6 procedures were sine, cosine, cube, square, common log, and natural log. In order to get this values we had to design loops. I have done that but, our professor wants us to have...
*October 30, 2011*

**Math**

Use the definition of logarithm to simplify each expression. log6b(6b) log8b((8b)^6) log12b((12b)^-11)
*October 30, 2011*

**Math**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.8 x10^2 µm. Find this earthquake's magnitude on the Richter scale.
*October 29, 2011*

**Mathematics**

After diving 92m below the sea level, the diver rises at a rate of 5 meters per minute for 7minutes. Where is the diver in relation to the surface?
*October 20, 2011*

**Please help-Math**

for 200 day... It ask what day in september is 200 days from March 3. Choices september 16, september 18, september 19, Seeptember 20.
*October 19, 2011*

**Please help-Math**

and could you help me with # 2, and #3.
*October 19, 2011*

**Please help-Math**

I have tried the rest. And the answers was wrong.Thats way I asked for help
*October 19, 2011*

**Please help-Math**

Please answer these problem for me.Thanks so much. 1. Border's Bookstore ordered 800 art books. On verifying the order, only 160 books were actually received. The percent of the order missing was: 2. The net price equivalent rate of 9/15/18 is: 3. If the net price of a ...
*October 19, 2011*

**Temperature**

What is the Kelvin temperature for 30°C?
*October 19, 2011*

**Chemisrty**

Determine which law is appropriate for solving the following problem. What volume will 1.56 liters of a gas at 27°C and 745 mmHg of pressure occupy at 100°C and 700 mmHg of pressure? Law used: Boyle's Law Charles' Law Combined Gas Law
*October 19, 2011*

**vba excel**

Our teacher wanted us to set up a command button that gives 3 input boxes on city, state, and zip code. Next we are suppose to use a Boolean type and set a true or false setting depending on the zip code that's suppose to be 5 digits. Next we are to insert two message ...
*October 18, 2011*

**World History**

The world's oldest recognized monarchy is found in _____. a. Kush b. Egypt c. Nubia
*October 13, 2011*

**Geography**

I put "RESOURCES: yaho o" Then it said I am not allowed to post any links. And it just did it again, so I just now spaced the two o's.
*October 13, 2011*

**Geography**

Well, I tired to say where the resource came from but it won't let me!
*October 13, 2011*

**Geography**

1. How to become democratic. People aren't used to voting and being given a choice. They aren't used to political parties. They have lived in a country where people fight and struggle to get to the top, usually at the expense of others. They are skilled in edging out ...
*October 13, 2011*

**Eating disorder**

Kind of. Doesn't answer my question exactly, but that it is good information to know. So thanks. And I'll go check that out. :)
*October 13, 2011*

**Eating disorder**

Well, like most people who are "big", you usually don't see them wearing tiny clothes becaus they know for a fact that something that small wouldn't fit them. I think if I had an eating disorder, I wouldn't wear small clothes because then I would be ...
*October 13, 2011*

**Eating disorder**

if anorexic people see theirselves as "fat" in the mirror, why do they still buy small sized clothing...?
*October 13, 2011*

**Physical Science**

Alpha decay. example type of radioactive decay, in which an atomic nucleus emits an alpha particle, and thereby transforms (or 'decays') into an atom with a mass number 4 less and atomic number 2 less. Many other types of decays are possible.
*October 13, 2011*

**Chemistry (PLEASE HELP ME)**

1. According to the phase diagram for water, how is the state of water determined? a. proceed up a vertical line at any given temperature b. read the phase at the intersection of any given temperature and pressure c. at a given pressure, proceed horizontally to the S-L or L-G...
*October 13, 2011*

**Algebra 1**

1. ◦1 Graph a single equation to see at a glance what the value of the equation is for many different points. An equation that shows how pressure varies with temperature becomes a lot more meaningful when it is graphed. By looking at the graph, you can instantly see what...
*October 13, 2011*

**Chem**

1. According to the phase diagram for water, how is the state of water determined? a. proceed up a vertical line at any given temperature b. read the phase at the intersection of any given temperature and pressure c. at a given pressure, proceed horizontally to the S-L or L-G ...
*October 13, 2011*

**Algebra 2**

I went to freemathhelp and this is what I got: *Not a conic section.
*October 13, 2011*

**math**

x/5 + y/6=5 2x/5 + y/3=-2 use sub method
*October 9, 2011*

**World History**

What major problem did the Roman Empire face in the mid to late Fourth Century? A. Immigration and invasion B. Lack of Education within the empire C. Weak leadership D. Poor infrastructure
*October 9, 2011*

**World History**

Of the four river valleys that supported major early civilizations, which one lost one of it's major rivers? A. Yellow River B. Mesopotamia C. Egypt D. Indus Valley
*October 9, 2011*

**VBA Microsoft Excel**

I have been on this problem for about 3 hours and I cannot solve it. My professor wanted us to make a command button with 3 input boxes ( I was able to do this part), but I'm suppose to design a boolean and select case that makes sure that a 5 digit number is entered in ...
*October 9, 2011*

**business law**

The Foreign Corrupt Practices Act of 1977.
*October 7, 2011*

**World History**

What is the Minoan civilization known for?
*October 7, 2011*

**Chemistry**

NaCl is made up of charged ions, which can interact with the dipoles present in the water molecules. I2 is held together by a covalant bond, neither atom is charged and they are not really attracted to water.
*October 7, 2011*

**math**

No problem!
*October 7, 2011*

**math**

64 - 9
*October 7, 2011*

**psychology**

Behaviorism.
*October 7, 2011*

**math**

Thanks for refreshing my memory, Writeacher.
*October 7, 2011*

**nutrition and wellness**

Yes.
*October 7, 2011*

**English ll**

Thannks, guys.
*October 7, 2011*

**English ll**

I dentify the complete adj. clause. 1. Many Californians who own homes live on hillsides. A: Who own homes live on hillsides. What word does the adj. clause modify? 3. I elected totake astonomy, which is not a required course. A: Astonomy 4. This course deals with facts that ...
*October 7, 2011*

**English II**

I dentify the complete adj. clause. 1. This course deals with facts that everyone should know. 2. Many Californians who own homes live on hillsides. What word does the adj. clause modify? 3. I elected totake astonomy, which is not a required course. 4. This course deals with ...
*October 7, 2011*

**Calculus**

Solve for x. Don't do the work using algebra and don't use a calculator. The Laws of Logarithms will be helpful. ln(x^2 - 1)= 3
*October 5, 2011*

**chem**

number of moles in 22.6g C3H7OH
*October 3, 2011*

**Math**

Choices are 7.421 7.3308 7.5555 7.3 7.49 7.65
*September 28, 2011*

**Math**

By default, your numerical entry is scored as correct if it is within 1% of the correct answer. A rule of thumb is always to enter at least 3 digits for numerical questions. If the correct answer is 7.48809, which of the following entries would be counted as correct? That is, ...
*September 28, 2011*

**Chemistry **

I am having a hard time solving this problem. The formula given is: T=Tin - (Tin - Tinit.)e(-v/v)t If the initial temperature Tinit is 115 (degrees F), the cold water temperature is 35 (degrees F) (1.7 degrees C), and the volume and volumetric flow rate are 3,000 liters and 30...
*September 25, 2011*

**Geometry**

What is the area of a rectangle with a length of 8 inches is 48 square inches. what is the perimeterof the rectangle?
*September 23, 2011*

**calculus**

is it C. or D.
*September 22, 2011*

**calculus**

Assume that x and y are differentiable functions of t. Find dy/dt using the given values. xy=x+4 for x=4, dx/dt=-5 a. 0.20 b. 3.75 c. 1.25 d. 5.00 e. -0.25
*September 22, 2011*

**Calculus**

The area of a circle is changing at a rate of 2 in.^(2)/sec. At what rate is its radius changing when the radius is 9 in.? a. (9/2)in./sec. b. (2/9)in./sec. c. (2/9pie)in./sec. d. (1/9pie)in./sec. e. (1/9)in./sec.
*September 22, 2011*

**Calculus**

C.
*September 22, 2011*

**Calculus**

Find (dy/dx) for the equation (7x+8y/9x-4y)=4. a. (dy/dx)=(-29/24) b. (dy/dx)=(43/24) c. (dy/dx)=(29/24) d. (dy/dx)=(-43/24) e. (dy/dx)=4
*September 22, 2011*

**Calculus**

Thanks, i thought it was B. your awesome.
*September 22, 2011*

**Calculus**

The number of people who donated to a certain organization between 1975 and 1992 can be modeled by the equation D(t)=-10.61t^(3)+208.808t^(2)-168.202t+9775.234 donors, where t is the number of years after 1975. Find the inflection point(s) from t=0 through t=17 , if any exist...
*September 22, 2011*

**calculus**

I will try but there is no diagram.
*September 22, 2011*

**calculus**

A power station is on one side of a river that is 0.5 mile wide, and a factory is 5.00 miles downstream on the other side of the river. It costs $15 per foot to run overland power lines and $23 per foot to run underwater power lines. Estimate the value of x that minimizes the ...
*September 22, 2011*

**algebra**

x/8-1/6=6
*September 20, 2011*

**Algebra 2 math**

What is the 32nd term of the arithmetic sequence where a1 = 12 and a13 = –60?
*September 19, 2011*

**Excel Problem**

the formula giving was T= Tin. - (Tin. - Tint.)e (-v/v) Where Tin = 1.7 degrees C and Tin is the to the temperature of the cold water flowing into the tank
*September 18, 2011*

**Excel Problem**

If the initial temperature is 115 F (46 degrees C), the cold water temperature is 1.7 (degrees C), and the volume and volumetric flow rate are 3,000 liters and 30 liters per minute, respectively, (a) Calculate the expected water temperature at 5-minute intervals for the first ...
*September 18, 2011*

**Chemistry**

How many milliliters of 5M H2SO4 are required to make a 1500ml of a .002M H2SO4 solution. I used the formula M*L=M * L so mL *5 = 1500 * .002 I got .6mL is this right?
*September 18, 2011*

**Chemistry**

Thank you DrBob222! For anyone else with the same problem here is how I did it following the above instructions d=1.24g/ml 1240g in 1L 1240g/342.3moles=3.6M
*September 18, 2011*

**UOP**

(1/15abc)*(5a^3b^5c^2)
*September 12, 2011*

**math**

Angles X and Y are congruent. Angle X has a degree measure of 15. What is the measure of angle Y?
*September 2, 2011*

**American History**

Put these in chronologica order according to their founding dates: U.S. Children's Bureau, FDA, National Park Service, American Legion, Federal trade commission
*August 26, 2011*

**Mathematics**

it has 6 sides
*August 15, 2011*

**chemistry 101**

What is the pH of a solution in which 296 mL of HCl g, measured at 28.0 C and 1.02 atm, is dissolved in 1.5 L of aqueous solution?
*August 10, 2011*

**chemistry**

296mL is the volume
*August 8, 2011*

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