Thursday
September 18, 2014

Posts by Valeria


Total # Posts: 36

Chemisty
a) Calculate the number of moles in 17.8 g of the antacid magnesium hydroxide, Mg(OH)2. b) A 0.850-mole sample of nitrous oxide, a gas used as an anesthetic by dentists, has a volume of 20.46 L at 123°C and 1.35 atm. What would be its volume at 468°C and 1.35 atm?
September 15, 2014

Math
y=-x x+y=3
April 7, 2014

math
Noah built a fenced dog run that is 8 yards long and 6 yards wide.He placed post at every corner and every yard along the length and width of the run.How many post did he use?
September 23, 2013

Physics
A 51.9-g golf ball is driven from the tee with an initial speed of 50.8 m/s and rises to a height of 28.4 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 6.08 m below its highest point?
July 1, 2013

psych statistics
Martha believes that a relaxation technique involving visualization will help people with mild insomnia fall asleep faster. She randomly selects a sample of 20 participants from a group of mild insomnia patients and randomly assigns 10 to receive visualization therapy. The ...
June 30, 2013

Physics
A planet has a mass of 6.22 × 1023 kg and a radius of 2.51 × 106 m. (a) What is the acceleration due to gravity on this planet? (b) How much would a 77.7-kg person weigh on this planet?
June 18, 2013

Physics
so, (south)^2 + (east)^2 = (southeast)^2 (11.5)^2 + (18.3)^2 = (resultant)^2 Resultant = 21.6 km/s Used different numbers but it works
June 18, 2013

science
how do i calculate the average speed and velocity on a graph??
January 23, 2013

math
ftrttru\ ]
October 20, 2012

science
idk
August 29, 2012

science
a student tests if the width of a pipe affects pressure of the flow of water. What is the independent variable and the dependent variable?
August 29, 2012

Precalc HELP PLEASE
thank you, what does RS and LS stand for?
January 23, 2012

Precalc HELP PLEASE
verify 1-sintheta * costheta * tantheta = cos^2theta
January 23, 2012

precalc HELP PLEASE
for all values of theta where 0degrees<theta<360degrees 2sin^2 theta -3sintheta = -1
January 23, 2012

4 grade math
how do you write the number 12,346,823 in expanded form
May 30, 2011

World cultures
What are the five main regions of Africa? I looked it up but, all of them say south, north, central, west, and east Africa
February 21, 2011

math
72
February 16, 2011

business
1. Aaron Nance is a freshman in college who has not yet decided on his major. He is thinking about majoring in operations management and is concerned about job opportunities in this field. Which of the following statements about jobs for operations management majors is most ...
May 11, 2010

math
HISTORY TEST You take a history test that has 100 regular points and 8 bonus points. You get a score of 91, which includes 4 bonus points. Let x represent the score you would have without the bonus points. Which equation represents this solution? Solve the equation.
September 27, 2009

English
C) Quantum mechanics is more important to the history of science than previous scientific theories.
May 7, 2009

essay writing
Are you supposed to write a fictional essay about this?
February 22, 2009

Thanks! :-)
:-)
February 22, 2009

Question
Here's what I did -10(.25x + .10y = .19(20)) I multiplied it by -10 so I could easily do the Elimination method. That gets me: -2.5x + -1y = -38 Then, I added the equations together to get: -1.5x = -18 I divided both sides by -1.5 and that got me x = 12. Did I go wrong ...
February 22, 2009

Algebra
Here's my question: Deep Thought Granola is 25% nuts and dried fruit. Oat Dream Granola is 10% nuts and dried fruit. How much of Deep Thought and how much of Oat Dream should be mixed to form a 20-lb batch of granola that is 19% nuts and dried fruit? Here is a past ...
February 22, 2009

Languages
Spanish-- no French-- non German-- nein Italian-- no Dutch-- geen :-)
February 20, 2009

Algebra
Oh... thanks! Now I see why I got a past equation wrong. Thanks for the help! <3 Valeria <3
February 20, 2009

Algebra
The Nutty Professor sells cashews for $6.75 per pound and Brazil nuts for $5.00 per pound. How much of each type should be used to make a 50-lb mixture that sells for $5.70 per pound? c = lbs of cashews b = lbs of brazil nuts Are these the right equations? b + c = 50 6.75b + ...
February 20, 2009

Algebra
The Coffee Counter charges $9.00 per pound for Kenyan French Roast coffee and $8.00 per pound for Sumatran coffee. How much of each type should be used to make a 20-lb blend that sells for $8.40 per pound? Here are the 2 equations (or system of equations) I created: K = lbs of...
February 20, 2009

chemistry
I don't get it
January 21, 2009

character traits (further questions)
rebecca refused to change her mind even when it was clear that she was wrong.she was nce
September 16, 2008

character traits (further questions)
rebecca refused to change her mind even when it was clear that she was wrong
September 16, 2008

math
multilpying nad dividing rational expressions
May 7, 2008

Accounting
After aging the accounts receivable, it si estimated that $800 will not be collected and the allowance account has a debit balance before adjustment of $100. The adjusting entry for estimating uncollectible account expense should be in the amount of_______?
April 10, 2008

accounting
After aging the accounts receivable, it is estimated that $800 will not be collected and the allowance account has a credit balance before adjustment of $200. The adjusting entry for estimating uncollectible account expense should be in the amount of_____?
April 10, 2008

italian
In the spoken language we say sono le sei del mattino
April 1, 2008

Math
A can with 40 marbles in it weighted 135 grams. The same can with 20 marbles weighed 75 grams. How much is the weight of the can? Explain your answer.
February 3, 2008

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