Tuesday

January 27, 2015

January 27, 2015

Total # Posts: 68

**precalculus**

Sin(x+y)cos(x-y)= 1/2sin2x+ 1/2 sin2y Help please I have no idea how to do this because my math class never did it but while making the final review for the chapter I was assigned, I put this one in it. They are going to all ask me how to do it. Sin(x+y)cos(x-y)= 1/2sin2x+ 1/...
*January 15, 2015*

**Reiny**

Just a question for you. How do you remember all this. I'm wondering because I'm in precalc and I always seem to forget how to do the problems a couple weeks after the test. You seem to know everything without even hesitating. Side note- I found this site by googling a...
*January 11, 2015*

**spanish**

Choose the answer that best completes the following sentence. _________ postres son deliciosos. a. El c. Unos b. Las d. La
*November 16, 2014*

**chemistry**

If 8.16 g of CuNO3 is dissolved in water to make a 0.500 M solution, what is the volume of the solution?
*November 9, 2014*

**Chemistry**

How many grams of chlorine gas are needed to make 5.40 x 10 6 g or a solution that is 1.40 ppm chlorine by mass?
*November 5, 2014*

**Chemistry**

Assuming equal concentrations and complete dissociation, rank these aqueous solutions by their freezing points: Li2SO4 K3PO4 LiNO3
*November 5, 2014*

**PHI208**

to find the meaning of life
*September 28, 2014*

**Accounting**

Needs the entries for the following scenarios: Capital accounts as follows : Mason ; 90,000 Jiri; 30,000 James; 60,000 a) Frank pays mason 25,000 for 20% of masons interest in the company b) Frank invests 60,000 cash in the partnership for a 40% interest in the business. The ...
*March 31, 2014*

**Physics**

Suppose there is friction (static coefficient = 0.22, and kinetic coefficient = 0.15). With this friction, what force (if any) is necessary to hold the 30kg mass stationary on a 35 degree incline?
*February 12, 2014*

**math**

a pentagon has a perimeter of 50 cm. the shortest side has a length of 3 cm. find the length of a similar pentagon if the perimter of the second penatgon is 80 cm ?
*September 25, 2013*

**algebra**

What would 13 less than 30 look like written as a numerical expression
*August 22, 2013*

**math**

i want to see the answer to this question
*May 11, 2013*

**Math**

6 and 7 inch
*April 29, 2013*

**Chemistry**

if a gas is initially at 1.5 atm of pressure, Occupies a volume of 3.0 L at a tmepeature of 293K, what will be the new volume if the pressure increases to 2.5 atm and is now at 303K?
*February 25, 2013*

**World History**

How did the struggle between rich and poor affect Athens and Spartens?
*January 24, 2013*

**7th Grade Science**

Jorge is that the answer.And what school do you go to.
*September 4, 2012*

**7th Grade Science**

Jorge is that the answer.
*September 4, 2012*

**Science**

Define a day by the passage of the sun
*July 22, 2012*

**English**

can you please help me though
*July 22, 2012*

**English**

im not sure
*July 22, 2012*

**English**

What is the love relationship like between Brently and Louise Mallard in the story of an hour?
*July 22, 2012*

**math**

so brooke is right the total sales tax is $3.89
*July 22, 2012*

**math**

for one shirt
*July 22, 2012*

**math**

actually you are both wrong he would pay exactly 0.777 cents in sales tax which rounds off to 0.78 cents in sales tax
*July 22, 2012*

**English**

Can I have your email Ms. Sue so i can send you my paper for proofreading
*July 22, 2012*

**English **

What is a good topic sentence for Louise Mallard's death in the story of an hour?
*July 22, 2012*

**algebra 117b**

1/4 or 0.25
*July 22, 2012*

**English**

yes
*July 22, 2012*

**English**

Is this a good SHORT summary of the story of an hour? Louis Mallard, the wife of Brently Mallard, can't stand her husband and wants a life without him. The moment she hears he died in a train accident she is happy and looks forward to her new life. She says that she is now...
*July 22, 2012*

**English**

Can u summarize the story of an hour in a few sentences?
*July 22, 2012*

**English**

can i have an introduction for how brently mallard died in the story of an hour
*July 22, 2012*

**physics**

A driver in a car traveling at a speed of 41.7 mi/h sees a deer 88 m away on the road. Calculate the magnitude of the acceleration necessary for the car to stop just barely miss- ing the deer (assuming that the deer does not move in the meantime). Answer in units of m/s2
*January 15, 2012*

**Accoubting**

Creating a Budget Various budget approaches play an important role in resource allocation in human service organizations. You are the executive director for a local government workforce agency that focuses on providing career- and work-related skills. The Department of ...
*June 4, 2011*

**science**

what happens to your image that is initially observed in a flat mirror from 10 feet away and then you move to 20 feet away
*April 26, 2011*

**Finite Mathmatics**

Two cards are drawn from a well-shuffled deck of 52 playing cards. Let X denote the number of aces drawn. Find P(X = 2).
*February 13, 2011*

**math**

18x + 9 / 3 > 10x - 4 / 2
*January 11, 2011*

**math**

18x + 9 10x - 4 ________ > _________ 3 2
*January 11, 2011*

**biology**

compare and contrast karyotype studies and pedigrees using a venn diagram
*November 16, 2010*

**5th grade**

what shape can fold into 50 deferent ways and still be equal on both sides?
*November 3, 2010*

**science**

What is a type of substance that does not dissolve? Thank you
*October 7, 2010*

**science**

Is a type of substance that dissolves a --solvent Also, if it is not crystalline--what is it?
*October 7, 2010*

**science**

What is the process that separates insoluable substances from a liquid. Thank you.
*October 7, 2010*

**8th grade Math**

To anonymous 5(x+2) = 35 is the equation. Pretty easy to solve from there
*September 9, 2010*

**12th grade-Advanced functions**

F(x) is a vertical stretch of the function G(x) since F(x) = G(x/3). F(3x) must equal G(x). I don't know if this helps but it's all I could think of.
*July 30, 2010*

**Algebra**

y=4x-1 y=2x-5 Use substitution to solve each system of equations
*January 26, 2010*

**math**

How do i find 1800 ml of water would fill a ________ cm3 container
*February 26, 2009*

**5th grade math**

I need some help with my math sheet lesson 11-12 with volume mass and capacity
*February 26, 2009*

**arithmetic**

What does 2/3 + 5/6 equal?
*February 3, 2009*

**Math/Applications and Concepts**

How do I find the product of 1/3, -3/8, and 4/5? Thank you!
*August 25, 2008*

**math**

solve by substution 4x-3y=36 x=2y+7 solution
*May 20, 2008*

**chemistry**

What amount is a mol?
*April 9, 2008*

**chemistry**

Calculate the xolubility of calcium sulfate in 0.010 mol/L calcium nitrate at SATP CaSO4 ==> Ca^+2 + SO4^= Ca(NO2)2 ==> Ca^+2 + 2NO3^- = 0.01 M Ksp CaSO4 = (Ca^+2)(SO4^=) = ??. Look up Ksp for CaSO4. Subsitute 0.01 for Ca^+2 and x for SO4^= and solve for solubility CaSO4...
*April 8, 2008*

**chemistry**

Caclulate the Ka of nitrous acid if a 0.200 mol/L solution at equilibrium at SATP has a percent ionization of 5.8% ka=(H+)(NO2-)/(HNO2-) If 1.59% ionized then after ionization H+ = 0.2 x 0.058 =? NO2- = 0.2 X 0.058=? HNO2=0.2 x (1.0 - 0.058) If solution is 5.8% ionized, than ...
*April 7, 2008*

**chemistry**

What mass in grams of potassium hydroxide is contained in 500 mL of solution that has a pH of 11.5? I have a pOH of 2.5 to get [OH] I do 10^-2.5 to get 0.001581138 Then I divide this by 2 to find the mols in 500 mL Then, grams = mols x molar mass = 0.00158``38 x 56.105 g/mol =...
*April 7, 2008*

**chemistry**

A student prepares a 0.20 mol/L aqueous solution of ascorbic acid and meausres its pH as 2.40. Based on theis evidence, what is the Ka of ascorbic acid? H+ = 0.00398 C- is the same (HC) = 0.2 = 0.00398 (0.00398)(0.00398) / 0.0199 =0.000796 Hi DrBob222 you told me you got 8.0 x...
*April 7, 2008*

**chemistry**

A 0.25 mol/L solution of benzoic acid, KC7H5O2 and antiseptic also used as a food preservative, has a pH of 2.40. Calculate the Ka of benzoic acid at SATP My work: C6H5COOH --> C6H5COO^- + H^+ Ka = (C6H5COO-)(H+)/ C6H5COOH I know my next steps are to use pH = log(H+) to ...
*April 7, 2008*

**chemistry**

What mass in grams of potassium hydroxide is contained in 500 mL of solution that has a pH of 11.5? Your response: [OH] = 1.0 x 0^-14 / 11.5 This isn't correct. If the pH is 11.5, then the pOH = 14 - 11.5 = 2.5 = pOH and (OH^-) = 0.00316 M. It appears to me that you have ...
*April 7, 2008*

**chemistry**

(x)(x)/(.001-x) = Kb (x^2)/(0.001 - x) = 1.0 x 10^-6 So, in the form of ax^2 +bx + c = 0 this is x^2 + 0.001x + 1.0 x 10^-6?
*April 7, 2008*

**English**

I need book reviews of "Carrie"
*December 16, 2007*

**Calculus**

Trying find the critical numbers for X^3+X^2-8x But i cant remember how to simplfy the derivitive of 3X^2+2X-8 can someone help me?
*November 6, 2007*

**Physics**

Can someone help me find Delta Time for the first 150 meters of this question. Everytime I try and get it by using the quadratic formula I get two negative numbers which I don't think is right. A model rocket is launched straight upward with an initial speed of 50.0m/s. It...
*September 28, 2007*

**math**

Just not really sure where to start with this problem
*September 16, 2007*

**math**

Let G(x)=2/(x+1) (a) Use the limit definition f the derivitive to find G'(0). (b) Find an equation of the tangent line to the curve y=2/(x+1) at the point (0,2).
*September 16, 2007*

**Math**

How would I would I solve this problem -25-75h=h+25 Add 25 to both sides. Subtract h from both sides. This should leave you with -76h = 50 Finally, divide both sides by -76
*March 15, 2007*

**Math**

Amayor has a friend in publishing who tells him they have just published 20 new books and tells him he may pick 10 of them. a.) How many different selections can the mayor make? b.)If the govenor picks ten distinct books, how many ways can he make his selection? a.)one ...
*February 8, 2007*

**Math**

.06 divided by 7.1
*January 11, 2007*

**Economics**

The state of the US economy is one where the price level has decreased from 110 to 120. Manufacturers are finding that their inventories are increasing. Foreign countries are finding that the exchange rate of the US dollar is down. Americans are substituting imported goods ...
*December 5, 2006*

**math**

how do you find the interval Interval between what and what? Since I am not sure what you are asking, I searched Google under the key words "find interval" and "find interval math" to get these possible sources: http://www.yawiktionary.com/i/1148366673828....
*September 25, 2006*

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