Wednesday
July 1, 2015

Posts by Bri


Total # Posts: 235

general chem
A certain monoprotic weak acid with Ka = 0.49 can be used in various industrial processes. (a) What is the [H+] for a 0.191 M aqueous solution of this acid and (b) what is its pH? Round the [H+] to three significant figures and the pH to two places past the decimal and do NOT ...
March 25, 2012

math
40% of the 25 students in the class are boys. Write 40% as a fraction? Then find the ratio of girls to boys
March 8, 2012

algebra
a landscaper uses square tiles to make garden paths the ends of the paths are always 2 tiles wide, and the center portions of the paths are 3 tiles wide. what eqation gives the total number y of tiles needed to make a path with a length of x tiles. the landscaper has 100 tiles...
February 26, 2012

Economics
110
February 22, 2012

statistics
Among coffee drinkers, men drink a mean of 2.8 cups per day with a standard deviation of 0.5 cups. Assume the number of drinking per day follows a normal distribution. What proportion drink 3 cups per day or more?
February 20, 2012

algebra, please help
(y^2 + 10y + 25)/(y^2 - 9) * (y^2 + 3y)/(y + 5) (y+5)(y+5)/(y+3)(y-3) * y(y+3)/(y+5) (y+5)/(y-3) * y/1 y(y+5)/(y-3) or y^2+5y/y-3
December 7, 2011

physics
A car is safely negotiating an unbanked circular turn at a speed of 17.2 m/s. The maximum static frictional force acts on the tires. Suddenly a wet patch in the road reduces the maximum static frictional force by a factor of three. If the car is to continue safely around the ...
November 22, 2011

Math-Algebra 2
Ace Rent a Car charges a flat fee of $15 and $0.25 a mile for their cars. Acme Rent a Car charges a flat fee of $30 and $0.17 a mile for their cars. Use the following model to find out after how many miles Ace Rent a Car becomes more expensive than Acme Rent a Car. c= 15+0.25m...
October 27, 2011

math
Lcm of 2 and 3
October 19, 2011

physics
A. m1a1=T-m1g and m2a2=T-m2g are your two equations, substitute and add and you get this --> T= (2xm1xm2)/(m1+m2) all multiplied by 9.8 (g). T= (2(3.0)(7.0))/(3+7) = 4.2(9.8) = 41.16 N B. Then just plug it in to one of your original equations. m1a1 = T-m1g (3.0)a = (41.16N...
October 14, 2011

Algebra
The sum of two consecutive odd integers is 56. A. Define a variable for the smaller integer. B. What must you add to an odd integer to get the next greater odd integer? C. Write an expression for the second integer. D. Write and solve an equation to find the two odd integers.
October 14, 2011

chemistry
20.0 g of CH3OH is frozen solid at -98.0 degrees C. What is the total energy required to melt it, warm the liquid to its boiling point, and then just vaporize it?
October 6, 2011

math
Fraction simplest 12 over 210
September 25, 2011

geometry
Given that ABC 53-x with a leg of 28 ~ DEC, x+3 with a leg of 4 find the value of x. If necessary, round your answer to two decimal places.
May 17, 2011

science
list 10 examples of slow changes over a long time. list 10 examples of quick changes over a short time.
April 13, 2011

ALEGBRA1
the point (-1,6) would be in quadrant 2.
April 13, 2011

math
George has a large circular table with a circumference of 18 feet. What is the approximate area of the table?
April 12, 2011

statistics
Assume that you own a small factory. A critical piece of machinery in your factory will need to be replacedin 180 days. If the machinery does not show up on time, you will need to shut down until it arrives. This might cause you to permanately lose customers.When you order the...
March 29, 2011

algebra (quadratic formula0
or the period 1990-2003, the amount of biscuits, pastas, and noodles y (in thousands of metric tons)imported into the united states ca be modeled by the function y=1.36(xsquared)+ 27.8x+304 where x is the number of year since 1990. a.write and solve an equation that you can ...
March 22, 2011

algebra (parabolas)
you throw a wad of used paper towards a wastebasket from a height of about 1.3 feet above the floor with an initial vertical velocity of 3 feet per second. a. write and graph a function that models the height h (in feet) of the paper t seconds after it is thrown b. if you miss...
March 20, 2011

algebra (parabolas)
find the axis of symmetry and vertex of the function. tell whether it goes upward or downward. 1. y=-xsquared+9 2. y=-2xsquared=7x-21
March 20, 2011

algebra (parabolas)
find the axis of symmetry and vertex of the function. tell whether it goes upward or downward. y=3*xsquared+6x-2
March 20, 2011

algebra (parabolas)
tell whether the graph opens upward or downward. then find the axis of symmetry and vertex of the graph of the function 1. y=xsquared-5 2. y=-2*xsquared+6x+7
March 20, 2011

social studies
never mind. a friend helped me.
March 16, 2011

social studies
my teachers do not want us on Wikipedia.
March 16, 2011

social studies
1. define Allah 2. the word Muslim means...? 3.JIHAD means to strive... what are Muslims striving for? 4. list and describe 5 contributions of Muslims to our lives today
March 16, 2011

polynomials
6. Simplify: 4x2yz2 2z Select answer A 2x2y2z2 Select answer B 2x2z Select answer C 2x2yz2 Select answer D 2x2y Select answer E 2x2yz
February 28, 2011

social studies
name 2 ways that it might affect our society if no one volunteered to help others.
February 28, 2011

algebra
The value of a certain two-digit number is eight times he sum of its digits. if the digits of the number are reversed the result is 45 less than the original number. find the original number. **please show both equations and work... thanks =)
February 28, 2011

6th grade science
What is the 47th element in the periodic table?
February 22, 2011

algebra
please write and equation, show your work, and find the answer: 1.a certain two-digit number has a value that is seven more than six times the sum of its digits. the tens digit is 3 more than the units digit. find the number 2.In Colorado Creek, Darrell can row 24km downstream...
February 16, 2011

chem.
physical or chemical property sodium metal fohrmhs an oxide when heated with oxygen?
February 16, 2011

Chemistry
calculate the enthalpy change in delta H foor heating 250 grams of liquid water from 0 degrees celcius to 100 degrees celcius.
February 11, 2011

earth
I DONT NO
February 2, 2011

algebra
ok thanks!
January 31, 2011

algebra
okaaaay im starting to get it. so what would the second equation be again? and can you please explain it? =) thanks!
January 31, 2011

algebra
ya i did today. but i dont understand how you got 24 as the y-intercept
January 31, 2011

algebra
i do not think that is what my teacher was asking for.
January 31, 2011

algebra
you will be making hanging flower baskets. the plants you have picked out are blooming annuals and non-blooming annuals. the blooming annuals cost $3.20 each and the non-blooming annuals cost $1.50 each. you bought a total of 24 plants for $49.60. write a linear system of ...
January 31, 2011

science
how is water purified in the water cycle? why is the sun so important in the water cycle? what role does evaporation play in the water cycle? thanks!!!! :)
January 26, 2011

language arts
there are three words to use to fill in each blank... the words are 1. automatic 2. tenant 3.volley here are the sentences: 1. OCCUPANT is to _________ as CHILDISH is to JUVENILE 2. BY HAND is to _________ as PALE is to BRIGHT 3. BARRAGE is to _________ as TOUGH it to ...
January 25, 2011

language arts
i understand the relationships and i understand they are analogies and how they work. i already checked the dictionary website and i still need help.
January 24, 2011

language arts
there are three words to use to fill in each blank... the words are 1. automatic 2. tenant 3.volley here are the sentences: 1. OCCUPANT is to _________ as CHILDISH is to JUVENILE 2. BY HAND is to _________ as PALE is to BRIGHT 3. BARRAGE is to _________ as TOUGH it to ...
January 24, 2011

math
90
January 20, 2011

MATH
-402
January 16, 2011

algebra
i think the answer is (x-8)<14 the parentheses stand for the absolute value sign
January 14, 2011

algebra
write the verbal sentence as an inequality and solve the inequality. (this has to do with absolute value inequalities) the distance between x and 8 is less than 14
January 14, 2011

language arts
thanks sooooooo much!
January 14, 2011

language arts
i cant find the definition of the word cautious. i tried that dictionary website and it didn't help. please help!
January 14, 2011

math
um i got n=3
January 12, 2011

algebra
Please
January 12, 2011

algebra
the new school has exactly 1000 lockers and 1000 students. on the first day of school, the students meet outside the building and agree on the following plan: the first student will enter the school and open all of the lockers. the second student will then enter the school and...
January 12, 2011

algebra
ya and it takes me to this website where i need a membership to access the info
January 12, 2011

algebra
the new school has exactly 1000 lockers and 1000 students. on the first day of school, the students meet outside the building and agree on the following plan: the first student will enter the school and open all of the lockers. the second student will then enter the school and...
January 12, 2011

science
i don't understand how you got the answer to number 2. is matter the composition?
January 10, 2011

science
here are some science questions I've been trying to do for over an hour and i just cant figure them out! 1.how does a fan convert energy? 2.what happens to matter during both a physical and chemical change? 3.give an example of a simple closed system 4. in a fire, why does...
January 10, 2011

math
the odds that it wont happen are 7/7-1/7=6/7. so your answer is 6/7. I'm not sure what the ratio would be... perhaps 6:7 i am not a tutor
January 10, 2011

algebra (inequalities)
your club is in charge of making pins that students can buy to show their school spirit for the upcoming football game. you have made 225 pins so far, and you only have 120 minutes left to make the rest of the pins. you need to make at least 400 pins. a. write an inequality ...
January 9, 2011

algebra (inequalities)
a weaver spends $420 on supplies to make wall hangings and plans to sell the wall hangings for $80 each. a. write an inequality that gives the possible numbers of (w) wall hangings the weaver needs to sell in order for the profit to be positive b. what are the possible numbers...
January 9, 2011

language arts
i have been looking EVERYWHERE for a correct definition of the words retaliatory and immune... please help!!!!
January 9, 2011

Physical Science
group 4 because they are the group that nothing is happening to. they are what the scientists will compare the results back to. hope that helps!
January 7, 2011

algebra
im sorry, i do not understand.
January 7, 2011

algebra
solve the inequality, if possible. -2x-<-2x-1 2n>n+n then tell what type of equation it is. it is either x># (or a variation of this), all real numbers, or no solution.
January 7, 2011

algebra
and are you trying to find the zero of the function? if you are then: f(x)=10/4-7x 0=10/4-7x -10/4=7x -5/14 is your answer.
January 7, 2011

algebra
do you mean f(x)?
January 7, 2011

algebra (inequalities)
solve the inequality, if possible. -2x-<-2x-1 2n>n+n then tell what type of equation it is. it is either x># (or a variation of this), all real numbers, or no solution.
January 7, 2011

algebra
if it is then: 9x-7y=-49 -7y=-9x-49 divide everything by 7 y=-1 7/25-49 hope that helps!
January 7, 2011

algebra
is this supposed to be a slope-intercept form question?
January 7, 2011

Math 3
convert to common denominators then add. 6/11 would become 78/143 and 2/13 becomes 22/143. add then reduce(if possible)
January 6, 2011

Math
1. you would do length*width*height 2. 3 feet equal 1 yard so do 3 1/2*3 3. 24 hrs are in one day so you divide 624 by 24
January 6, 2011

science
thanks a bunch!
January 6, 2011

science
i need help finding some household items that have some of the following forms of energy: radiant, chemical, nuclear, electrical, acoustic, thermal, and mechanical. so far i have the TV as electrical, acoustic, and mechanical; the stove top as electrical, caustic, mechanical, ...
January 6, 2011

arithmetic
you would divide each side by 7/8 to get the variable alone. once you solve 3 divided by 7/8, you should get what h is.
January 6, 2011

Algebra
point: (4,5) slope: -2 y=-2x+b 5=-2(4)+b 5=-8+b -3=b your final answer is y=-2x-3
January 6, 2011

Social Studies
Ok. Maybe states. That makes more sense.
January 4, 2011

Social Studies
I need to list 10 countries of the North. I thought-USA, Canada, Greenland, etc but can't come up with 10. For South-South America, Chile,etc. Not sure if that"s correct.
January 4, 2011

Social Studies
I need to list 10 countries in the North and 10 countries in the South during slavery times. Can't find anything. Please help. Thank you.
January 4, 2011

unscramble spanish words
rrbuaio
January 2, 2011

AP Calculus
A line is perpendicular to 2x+y-7=0 and passes through (4,6). Find the y coordinate of the point where x=-8
December 16, 2010

Math
in parralleloggran WXYX m/_Y = 65 What are the measurea of /_W , /_X, and /_Z in degrees?? /_= angle
December 1, 2010

College Chemistry- Hess's Law
-109.5
October 22, 2010

Math
Of the 43 U.S. presidents,15 were elected to serve two terms.What fraction of the U.S. president,in simplest form,was elected to serve two terms?
October 12, 2010

chemistry
What mass of protons would be required to just neutralize the charge of 4.4g of electrons?
September 20, 2010

english
thank u ms sue
September 11, 2010

english
people with stronger friendship networks feel like there is someone they could turn to what does that quote means please help meee
September 11, 2010

art
aaron Douglas first picture from the harlem of renaissance the name of the picture and date/time and material used and used for and symbolism please help meeee
September 11, 2010

6th grade/math
change .5 into a fraction
September 10, 2010

science
should i heat material in a closed container or vessel
August 27, 2010

Government
to hell with it
June 20, 2010

alegebra 1
would 3x^2-15x+18 = x(x+5)(x-3)????
May 24, 2010

marketing
What are some of the different stages a company goes through when developing its IMC strategy?
May 14, 2010

Chemistry
What equation is used when talking about airplane cabin pressure?
April 27, 2010

algebra
solving quadratics
April 19, 2010

12th grade
find the max and min values of f(x,y)= 3x+y for the polygonal convex set determined by x ¡Ý 1, y ¡Ý 0, and x+ .5y ¡Ü 2
April 18, 2010

us history
how did woodrow wilson's reform platform during the 1912 campaign differ from that of theodore roosevelt?
January 31, 2010

psychology
Scenario: John is an 18-year-old freshman at New York University. John was the starting quarterback at his high school in a small town in Indiana. He enjoys playing sports and hanging out with friends. John has always been popular and done well in school and sports. Once he is...
January 16, 2010

PreCalculus
Three sides of a fence and an existing wall form a rectangular enclosure. The total length of a fence used for the three sides is 160 feet. Find the value(s) for which the area is 2800 square feet.
January 13, 2010

social studies
i have a project due on n.j. piedmont regions what are they
October 25, 2009

7th grade
The answer to what did the Spanish farmer say to his chicken is olay, I'm positive I got 100% on my paper.
October 21, 2009

AP Calculus
thanks so much!
October 5, 2009

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