# Posts by sally

Total # Posts: 1,300

**Math**

Use the echelon method to solve the system: x + 3y + 4z = 14 2x – 3y +2z = 10 3x – 9y + z = 9

**Math**

Find the equation of a horizontal line going through (-5, -19)

**College algebra 116**

Real world problem You are hosting a party at a restaurant. The restaurant charges $150 to reserve the room plus $25 person for food and drink. Write a linear equation representing your total bill based on the numbe of people at your party. If you graph this line, what is its ...

**Math**

Thomas said that 30% of his earning was spend for food. How much money does he spend in one year for food?

**math/trigonometry**

solve this equation by completing the square. x^2+4x-21=0

**psychology 230**

wat influence does culture have on personality?

**math**

a vending machine takes only nickels and dimes. there five times as many dims as nickels in the machine. the face value of the coins is $4.40. how many of each are there?

**physics 6a**

A potential difference of 4.75 kV is established between parallel plates in airf the air becomes ionized (and hence electrically conducting) when the electric field exceeds 3.00×106 V/m, what is the minimum separation the plates can have without ionizing the air? d=...

**science**

If 75grams of KNO3 are dissolved in 100 grams of H2O at 45 degrees Celsius, what level of saturation is in the soultion.

**physicsa 6a**

sorry again my computer..2.4m

**physicsa 6a**

thnak you! Can you please help me with this one as well? Its the same problem: 2.40 at an angle of 45.0 downward from the horizontal?

**physicsa 6a**

I am so sorry my computer didn't transfer it 28nC 4.00*10^4N/C .550m to the right

**physicsa 6a**

A charge of 28.0 is placed in a uniform electric field that is directed vertically upward and that has a magnitude of 4.00×104 . What work is done by the electric force when the charge moves

**Chemistry**

Hello, I have a question about something we learned in chemistry today. We've been going over Ka/Kb table values, and using them to determine if a solution is acidic, basic or neutral. One of the compounds (in aqueous solution) are NH4OCl (aq), which is supposedly basic. ...

**Algebra/trigonometry**

The expression cos4x cos3x+ sin4x sin3x is equilvalent to?

**algrbra/trigonometry**

in triangle ABC, angle a=120, b=10, and c=18. What is the area of triangle ABC tot he nearest square inch?

**algebra/trigonometry**

What are the values of theta in the interval 0degrees less than or equal to theta less than or equal to 360 degrees that satisfy the equation tan theta - radical3=0

**Algebra/trigonometry**

okay thank you

**Algebra/trigonometry**

The expression (3-7i)^2 is equivilant to? i know what the answer is im just not sure how to get it please help

**spanish**

I need to translate words in to Spanish from english

**algebra**

find sales tax in your area --(6%). using tax rate, write a linear equation representing the total with tax for a purchase of x dollars. Using this equation to dtermine what the pretax cost of the item is if the total cost is $10.

**Social Studies**

Explain the use and development of transportation and communication systems in regions of Canada.

**Math**

I have a bag of tiles 0-9. Without looking select a tile, record, return tile, select a second tile. What is the probability that exactly one tile will be a prime number?

**Chemistry**

a) moles of malachite in 1g: 1g / (221.12g/mol) = .004522 mol (b) moles of CuO produced: .72g / (79.55g/mol) = .009051 mol (c) ratio of moles of CuO produced per moles of malachite decomposed: 2CuO/CuCO3(OH)2 2*79.5/221.1 = 0.719 3. Use the mole ratio of CuO produced per mole ...

**chemistry**

(a) Mass of an empty Erlenmeyer flask (g): 91.780g (b) Mass of the Erlenmeyer flask with malachite(g): 92.780g (c) Subtract (a) from (b) to obtain the mass of malachite (g): 1g (c) Mass of Erlenmeyer flask with CuO(g): 92.500g (d) Subtract (a) from (c) to obtain the mass of ...

**chemistry**

3. Use the mole ratio of CuO produced per mole of malachite to write a balanced equation for the malachite decomposition reaction. Assume that CO₂ is also a product of the decomposition. CuCo3*Cu9OH)2 -----> 2Cuo+Co2+H2O 0.004522431 moles of malachite 0.01257071 moles...

**Geometry**

In Triangle ABC, a=7, b=6, and c=8. find angle B to the nearest degree?

**human services**

yes

**human services**

What are ethical dilemmas in medicare, medicaid, family planning, patient privacy, and privatilization?

**AP Chemistry**

The Ksp is 2.4 x 10^ -5. When I worked through this problem again, I came up with 2.0 x 10 ^-4 for Qsp

**AP Chemistry**

Thank you... Just to make sure... Since Qsp= 0.005 a precipitate will form.

**AP Chemistry**

Does precipitation occur when 100. mL of 0.050 M CaCl2 is added to 100. mL of 0.10 M K2SO4? Show calculations to support your response.

**AP Physics**

If 540 nm light falls on a slit 0.0490 mm wide, what is the full angular width of the central diffraction peak? °

**AP Physics**

Monochromatic light falls on two very narrow slits 0.050 mm apart. Successive fringes on a screen 4.60 m away are 5.7 cm apart near the center of the pattern. Determine the wavelength and frequency of the light. wavelength nm frequency Hz

**AP Physics**

Monochromatic light falls on two very narrow slits 0.050 mm apart. Successive fringes on a screen 4.60 m away are 5.7 cm apart near the center of the pattern. Determine the wavelength and frequency of the light. wavelength nm frequency Hz

**american history**

How did the Woodfrow Wilson's reform platform during the 1912 campaign differ from that of Theodore Roosevelt?

**Trig**

A. Find simpler, equivalent expressions for the following. Justify your answers. (a) sin(180 + è) (b) cos(180 + è) (c) tan(180 + è) B. Show that there are at least two ways to calculate the angle formed by the vectors [cos 19, sin 19] and [cos 54, sin 54].

**Trig**

4. Asked to simplify the expression sin(180−è), Rory volunteered the following solution: sin(180−è) = sin 180−sin è, and, because sin 180 is zero, it follows that sin(180−è) is the same as −sin è. Is this answer ...

**math/computers**

Problem: Solve X mod Y for all positive integers. Do so without using multiplication or division.

**geometry**

5. The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60-degree angle at P. (a) Find the area of triangle PQR. (b) Find the length of the projection of segment PQ onto segment PR. (c) Find the length of segment QR. (d) Find the sizes of ...

**Math**

Tim put red, white and blue marbles in a bag. One-third are red, one-fourth are are white and ten are blue. how many of each are in the bag and what color are they?

**human services**

what is ethical advisory boards?

**vector**

If two vectors u and v fit the equation (u − v) • (u − v) = u•u+v•v, how must these vectors u and v be related? What familiar theorem does this equation represent?

**geometry**

The lengths of segments PQ and PR are 8 inches and 5 inches, respectively, and they make a 60-degree angle at P. (a) Find the area of triangle PQR. (b) Find the length of the projection of segment PQ onto segment PR. (c) Find the length of segment QR.

**vectors**

If two vectors u and v fit the equation (u − v) • (u − v) = u•u+v•v, how must these vectors u and v be related? What familiar theorem does this equation represent?

**math**

A little, but confusing sometimes.

**math**

What is the length of the vector [5 cos theta, 5 sin theta]? If the vector [5,0] is rotated 36 degrees in the counter clockwise direction, what are the components of the resulting vector?

**Trig**

Find all solutions w between 0 and 360, inclusive: (a) cosw = cos(−340) (b) cosw = sin 20 (c) sinw = cos(−10) (d) sin w < − 1/2 (e) 1 < tanw

**math**

What is the length of the vector [5 cos è, 5 sinè]? If the vector [5,0] is rotated 36 degrees in the counter clockwise direction, what are the components of the resulting vector?

**math**

Thanks

**math/trig**

What graph is traced by the equation (x, y) = (5sin 12t , 6−5 cos 12t)?Think of another equation that will produce the same graph. Use your calculator to check.

**math**

Solvefor y: x2 = a2 + b2 − 2aby

**geometry**

A segment that is a units long makes a C-degree angle with a segment that is b units long. In terms of a, b, and C, find the third side of the triangle defined by this SAS description. You have done numerical versions of this question. Start by finding the length of the ...

**math/geometry**

Jamie rides a Ferris wheel for five minutes. The diameter of the wheel is 10 meters,and its center is 6 meters above the ground. Each revolution of the wheel takes 30 seconds. Being more than 9 meters above the ground causes Jamie to suffer an anxiety attack. For how many ...

**science 7**

1o plant based products used weekly. Classify them into plant for food and plant for fiber

**grammar**

Which one do you think it is first?

**human services**

What is the difference between primary, secondary, and tertiary preventio? I am workiong on three scenario's in hsm/210?

**English**

Yes, for everything is action.

**social studies**

what are detors called when they work to pay off there det?

**bis/219**

Discuss how all three of the book stores address ethical, legal and security issues

**Math (trig)**

In ABC, sin A equals 2/3 , sin B equals 4/5 , and side a equals 20 Find side b?

**English**

is the following sentence biased? Our new district attorney, a Cuban American, is making a speech on Saturday.

**algebra**

1. You have recently found a location for your bakery and have begun implementing the first phases of your business plan. Your budget consists of an $80,000 loan from your family and a $38,250 small business loan. These loans must be repaid in full within 10 years. a. What ...

**communications**

What are personal conflict management styles

**history**

why did people think they could be free from suffering through buddhist teachings?

**Math**

Find P(5,2).

**math**

A set of data is normally distributed with a mean of 16 and a standard deviation of 0.03. What percent of the data is between 15.2 and 16?

**physics**

idk

**human resource**

Is there anyone familiar with course 230/Ethical Issues in Human Services???

**human services**

Which do you think ahs the greatest power to solve or prevent the delimmnas?

**human services**

I scored an A

**human services**

I am totally lost!!!

**human services**

Am I on the right track---Human services organizations are in the line of business. The deilemmas ar this affects the culture od the society, leaders are reaponsible for progress oth oragnization , and people are directed by sources that are mandated through the mission of the...

**human services**

How does the unique realtionship between human service oragnizations and the populations they serve impact ethical decisions? what are some dilemmas that occur in human service organizations? which do you thind has the greatest power to solve or prevent these dilemmas;...

**childcare**

the formation of childrens core values is most strongly influenced by?

**Human Services**

In the code of the Community Service Code why is theinstructuin is necessaary? what does it tell you about the relationship between law and ethics?

**macroeconomics**

Suppose in 2009 the united states congress passes a minimum wage law that increases the minimum wage (the lowest legal wage) to 7.25 per hour and has a provision that increases the minimum wage at the beginning of each year based on the CPI for the previous year. a.) If the ...

**macroeconomics**

In 1995, the CPI was 152.5 and the price of an economics textbook was 70.00 dollars and a music cd was 16.00 dollars. If the CPI was 172.3 in 2007, what were the prices of the economics textbook and the music cd in 2007 dollars

**college**

What is the difference between values and factors in human service organization

**social studies**

can you please compare and contrast ; direct democracy and representative democracy?

**physics**

The magnitude of the vectors F is 20 N, the force on the right is applied at an angle 55◦ and the the mass of the block is 75 kg. If the surface is frictionless, what is the magnitude of the resulting acceleration? Answer in units of m/s2.

**6 math**

Ricky had 2/3 gallon of fruit punch left over from his party. He gave Jason 1/4 gallon the next day. What fraction of a gallon of fruit punch does Riky have left?

**College Physics**

A current exists in a wire that gradually narrows down to a smaller diameter. How do the drift velocity, the current density, and the electric field vary along the wire? Can you please help explain this?

**math (calc 2)**

x+y=3 x-4=-(y-l)^2 rotate about the x-axis

**physics**

A man can throw a ball a maximum horizontal distance of 149 m. The acceleration of gravity is 9.8 m/s2 . How far can he throw the same ball verti- cally upward with the same initial speed? Answer in units of m.

**health**

Things that are happening in the world today that can cataclysmically affect public health

**algebra**

calculated area of a room is 174.2 square feet and the actual area is 149.6 the question was 'What is the relative error of the area to the nearest ten-thousand?' Im confused about what is relative error and how can i get that?

**Math**

How do you solve this problem? 3/4(11/12-7/8)+5/16

**Math**

How do you solve this? I have tryed so many times and can not get the right answer. (1.65-1.05)^2/0.4+0.8 The answer is suppose to be 1.7 but everytime I do the problem i don't get anything near that answer. Help would be greatly appreciated.

**Algebra**

Hello, need help in finding the slope for this question(0,-9) and (-4,0) thanks sally

**world history**

How did the Reformation in England effect the colonization of the New World?

**physics**

What vector represents the displacement of a person who walks 15 km at 45 degrees south of east, then 30 km due west?

**AP Statistics**

A. .0251 B. .0020 C. None

**Math**

The class average on a math quiz was 74 and the standard deviation was 6.8. Find the z-score for a test score of 82.

**math**

f(x)=xsquared+10 and g(x)= square root of x-1 and i have to figure out g(f(-3) i just don't know how to do it because i thought you could not have a negitive under a radical?

**art**

i need a photo of an animal, I can't think of any animal, please send some pictures!

**English**

In the book To Kill A Mocking Bird why does Mayella also represent a mocking bird. Who in todays society can be looked upon as a mocking bird?

**math**

because if you think about it if you double 3 that is 6 and if you take half of 8 that is 4 and your answer to 24 divided by 6 is 4 im not sure if this helps but that's all i got=]

**Ap world history**

well i started writing a thesis statement but im not sure if it is correct? i wrote: During the classical period Han and Roman attitudes towards technology were self glorifying, however, the Han had a more unified and was more to the common people, where, Rome had an ...

**Ap world history**

How do i write a thesis statement for analyze the Han and Roman attitudes towards technology? Or can i get one to use?