Saturday

May 28, 2016
Total # Posts: 1,515

**Math**

Working with simple addition and multiplication of positive and negative numbers. Have completed 59 of 60 problems on a worksheet, I am stumped by one of them. For example Two numbers are given 30 and 13, You must find two number multiplied together equal -30 and when added ...
*April 9, 2008*

**advanced math**

whatisasteamandleafplot?
*March 17, 2008*

**algebra**

The expression y/x - 1/2 is equivalent to:
*March 13, 2008*

**algebra**

The expression y - 1 - x
*March 13, 2008*

**Algebra**

In reply to your questions: 1. It is (1/2)x 2. It is -3-1/2 3. Yes 4. Yes
*March 11, 2008*

**Algebra**

1/2x-3/4y=-3-1/2; find value of x 2x-3=x-3y-1; find valud of y 1. graph 2. solve by substitution
*March 11, 2008*

**algebra**

1/2x-3/4y=-3-1/2; find value of x 2x-3=x-3y-1; find valud of y 1. graph 2. solve by substitution
*March 11, 2008*

**Algebra**

5x=1/2y-1, find value of X; 1/4y=10x-1, find value of Y (use substitution)
*March 10, 2008*

**Algebra**

Solve by substitution: 6a=5(3+b+a)-a; find value of a 3(a-b)+4b=5(1+b); find value of b
*March 10, 2008*

**Algebra**

6a=(5(3+b+a)-9, find value of a; 3(a-b)+4b=5(1+6), find value of b
*March 10, 2008*

**chemistry**

Consider the following chemical equilibrium: SO3(g) --> SO2(g) + 1/2 O2(g) and Delta H = 98.9J a. Predict weather the forward or reverse reaction will occur when the equilibrium is disturbed by: i. adding oxygen gas ii. compressing the system at constant temperature iii. ...
*March 6, 2008*

**math**

In a group of 25 boys, 18 like Association Football whilst 14 like Rugby Football. How many like both kinds of football?
*March 4, 2008*

**math**

I was wondering if this statement is true or false. The statement is 0 times h(4)= h(0 times 4). Is this true or false and why?
*February 27, 2008*

**Western Civilization**

Name three differences between Rousseau and most Enlightenment philosophers.
*February 26, 2008*

**Chemistry**

7.5x10^-2
*February 25, 2008*

**History**

In the time when the colonies were first being established who claimed the land to the west and north of the English colonies?
*February 24, 2008*

**economics**

Why is an economy's output, in essence, is also its income?
*February 19, 2008*

**economics**

What are example of trade flow, capital and labor flow information and technology flow and financial flows
*February 10, 2008*

**English IIII**

I need to obtain litary criticisms for William's "A Streetcar Named Desire"
*January 30, 2008*

**Math Word Problem**

Counting Chicken Wings At Annie's Home-Cooked Chicken Wings Restaurant, chicken wings are served by the bucket. The Biggest Bucket O'Wings is really big! Figure out how many wings are in the bucket. If the wings are removed two at a time, one wing will be left. If they...
*December 11, 2007*

**math**

what is the greatest number of times you would regroup when multiplying a three digit factor by a two digit factor. give an example.
*November 26, 2007*

**Math-word problem**

Who is Shirley?
*October 30, 2007*

**chemistry**

Why does sodium acetate (anhydrous)release heat when dissolved in water?and why does sodium acetate (trihydrate)absorb heat when dissolved in water?
*October 24, 2007*

**science**

why ch3coona + h2o release heat?
*October 23, 2007*

**Math**

Can you help me with this problem? At the beginning of January, Lisa had some money in her savings account. Each month she was able to deposit enough from her allowance to double the amount currently in the account. However, she had a loan to pay off, requiring her to withdraw...
*October 23, 2007*

**CHEMISTRY**

I have to make it so the results of the average is less than 25. Average of three volumes: 13+11.3+9.2= 33.5/ 3= 11.16 mL Convert mL to L 11.16 mL x 10^-3 L = .01116 L The number of moles of HCl was calculated using the stoichiometry : 1 mole HCl= ½ moles CO3 .01116 L x...
*October 22, 2007*

**ETH 125**

Japanese Language is didfferent from the chinese. Education is similar they pursue further education.
*October 15, 2007*

**biology**

how does the extinction of dolphins affect the sustainability of the Earth?
*October 7, 2007*

**letters,memo,and email messages**

How would you approach creating a negative message for a superior.
*October 4, 2007*

**foreign currency**

How does the credit or money market hedge work?
*October 2, 2007*

**science IPC**

Acceleration (the change in speed per unit time) is measured in meters per second sqaured. Acceleration is a ?? metric unit and is comprised of ??
*October 1, 2007*

**social studies**

Race, religion, background etc
*September 30, 2007*

**Physics**

5.17
*September 17, 2007*

**finance**

Residual dividend model Buena Terra Corporation is reviewing its capital budget for the upcoming year. It has paid a $3.00 dividend per share (DPS) for the past several years, and its shareholders expect the dividend to remain constant for the next several years. The company&#...
*September 4, 2007*

**finance**

Would each of the following increase, decrease, or have an indeterminant effect on a firm’s breakeven point (unit sales)? a. An increase in the sales price with no change in unit costs. b. An increase in fixed costs accompanied by a decrease in variable costs. c. A new ...
*September 4, 2007*

**finance**

New project analysis You must evaluate a proposal to buy a new milling machine. The base price is $108,000, and shipping and installation costs would add another $12,500. The machine falls into the MACRS 3-year class, and it would be sold after 3 years for $65,000. The ...
*September 4, 2007*

**Math**

What do we call the numbers that cannot be arranged into 2-way arrays? Please answer my homework is due today!
*August 30, 2007*

**math**

yea i dunno?
*August 30, 2007*

**ETHICS**

How can the country best prepare for the changing race and ethnicity of its current and future citizens
*August 24, 2007*

**Social Studies**

What is the name of a large city in southern Turkey? There are many cities in southern Turkey. This map shows major cities. The other site lists Turkey's largest cities. (Broken Link Removed) http://en.wikipedia.org/wiki/List_of_cities_in_Turkey
*August 13, 2007*

**gaussian elimination**

4. Solve the following linear system using Gaussian elimination. Show work. 3x + y – z = -5 -4x + y = 6 6x – 2y + 3z = 2 how about looking at http://www.mathwords.com/g/gaussian_elimination.htm
*August 8, 2007*

**cramers rule**

Solve the following linear system for x using Cramer’s rule. Show work. x + 2y – 3z = -22 2x – 6y + 8z = 74 -x – 2y + 4z = 29 Cramer’s rule uses determinants to find the solution Set up a 3by3 matrix using the coefficients of the x,y and z, and find ...
*August 8, 2007*

**Chemistry**

Why is it when you add bromine to trans-cinnamic acid, it is more slow than the addition of BR2 to a regular alkene? You might want to look at the mechanism of bromine addition to an alkene.
*July 26, 2007*

**Algebra**

Would someone please check these answers? Simplify. 3/x-5+1/1-4/x-5 For this answer I got: x-2/x-9 Divide. x^2-49y^2/6x^2+42y/(x^2-7xy) For this answer I got: (x+7y)/6x(x^2+7y) Add. Express your answer in simplest for. x/6+3x/6 For this answer I got: 2x/3 Please check my ...
*July 12, 2007*

**Algebra**

Solve. x-3/15=1/3 I get 8 as an answer. Is this correct? If you substitute 8 for x, you'll find that 8 is not the correct answer. x - 3/15 = 1/3 x = 3/15 + 1/3 x = 3/15 + 5/15 x = ______ Please post your answer and a teacher will be glad to check it. Does x=8/15?
*July 12, 2007*

**Algebra**

Simplify complex fraction w+3/4w/w-3 2w Without providing parentheses and ^ signs for exponents, there are many ways to interpret what you have written. Each gives a different answer. Do you mean to write [w + (3/4)w]/(w-3) * 2w ?
*July 9, 2007*

**Trigonometry**

Solve for x to the nearest hundreth and can you explain how you get your answer I don't understand 3^x = 1.295 Your question has nothing to do with trigonometry. You can solve for x by taking the logarithm (to any base) of both sides of the equation. Then x log 3 = log 1....
*June 10, 2007*

**writting**

How would you approach creating a negative message for a superior? http://answers.yahoo.com/question/index?qid=20060830050606AACEvV3 ... and be sure you use a spell-checker.
*June 7, 2007*

**philosyphy**

Why do we drive on parkways and park in driveways? Why is there brail on a drive up ATM? More riddles -- these need to be posted in the Riddles section at the bottom of the main Jiskha page. =) Parkway: A parkway is a general designation of a type of limited-access highway in ...
*June 7, 2007*

**riddle**

What is as big as a castle. Weighs nothing, but a thousand men can't move it? I would guess its shadow at the right time of night. I keep saying stupid things...then correcting myself. Right time of DAY* I think its a cloud....:-)
*June 7, 2007*

**Diamond?**

I recently recieved agorgous "diamond" ring as a gift. He said it was real but I'm not sure. It looks real, the four Cs and everything. But to know for sure without it being apraised I need to know what the stamps inside mean. GF"A" Does anyone have an ...
*June 6, 2007*

**Trigonometry**

factor: 3n^2+14n-5. I'm stuck! (3n -1 )(n + 5)
*June 4, 2007*

**Algebra**

Multiply(x-2)(x+2) I am totally lost! just foil it out take the first 2 terms from each parentheses and multiply them. then add the product of the inside and outside terms, then add the product of the last 2 terms = x^2-2x+2x-4= x^2-4
*June 4, 2007*

**Algebra**

Please check my answer. Solve the system of linear equalities graphically. 3x-y<=6 x>=1 y<=3 For the answer I have: Equation in slope intercept form: Equation 1:y-intercept as ordered pair=> (0, -6) Equation 1: x-intercept as an ordered pair=> (2,0) Do I have ...
*June 4, 2007*

**Algebra**

Solve the system.4x+3y=11 and3x -2y=4 x= -2 and y = -1 678/987
*June 3, 2007*

**Algebra**

Evaluate the given function for the value specified. 2. f(x) = x squared - 7x + 10; find (a) f(0), (b) f(5), and (c) f(-2). a) f(0)=> b) f(5)=> c) f(-2)=> I didn't see your work, so it's hard to critique it. Take the 0, 5, and -2 and plug it in for "x&...
*May 27, 2007*

**Behavioral Science**

How do sociological factors affect a person's behavior? What sociological factors do you believe affect your behavior the most? Do you shave? Do you use deodrant? Do you bathe more than once a week? Do you match your clothes? Do you arrive on time? Do you call boys and ask...
*May 24, 2007*

**Algebra**

Why might notation be important? Explore the reasons for function notation.
*May 23, 2007*

**Algebra**

The equation y=15x-100 describes the amount of money a high school class might earn from a paper drive. What are the slope and y-intercept for this equation? Slope is the coefficent of x, and the y intercept is the value of y when x=0 Please try the following site: http://en....
*May 21, 2007*

**Algebra**

Graph the inequality y>=3x Draw the line y=3x on a graph. The line and everything above it satifies y>= 3x
*May 21, 2007*

**Algebra**

These data represent the population of a certain city. Year Population(in thousands) 1950 18 1960 23 1970 29 1980 32 1990 38 2000 42 Use the line graph to predict the population in the year 2010 I recommend graphing the points, draw a best fit line, then project it to 2010. I ...
*May 21, 2007*

**Algebra**

In planning for a new item, a manufacturer assumes that the number of items produced x and the cost in dollars C of producing these items are related by a linear equation. Projections are that 100 items will cost $10,000 to produce and that 300 items will cost $22,000 to ...
*May 20, 2007*

**Algebra**

Write the equation of the line L satisfying the given geometric conditions. L has y-intercept (0,-3) and is parallel to the line with equation y=2/3x+1 I will be happy to critique your work on this. y=(2/3)x-3?
*May 20, 2007*

**Algebra**

Write the equation of the line L satisfying the given geometric conditions. L has y-intercept (0,2) and is perpendicular to the line with equation 2x-3y=6 Show work I will be happy to critique your work on this. 3x+2y=4?
*May 20, 2007*

**Algebra**

Write the equation of the line passing through the given pair of points. (2,-3) and (2,4) I will be happy to critique your work on this.
*May 20, 2007*

**Algebra**

Write the equation of the line passing through the given pair of points. Write your result in slope-intercept form. (-1,3) and (4,-2) Show equation I will be happy to critique your work on this. y-3=1(x+1) y-3=1x+-1 y=x+2?
*May 20, 2007*

**Algebra**

Write the equation of the line passing through the given point with the indicated slope. Give your results in slope-intercept form. Point: (0,5) Slope: m=-3/5 Show equation I will be happy to critique your work on this.
*May 20, 2007*

**Algebra**

Write the equation of the line passing through (3,10) and (3,-3) Notice the line is vertical. Equation is x= constant. You figure what the constant is.
*May 20, 2007*

**Algebra**

Find the slope of the line through the following pairs of points. (4,3) and (-5,3) equals to 0 Notice the y is constant, this is a horizontal line, zero slope.
*May 20, 2007*

**Algebra**

Write the equation of the line passing through the given point with the indicated slope. Give your results in slope-intercept form. Point: (0,5) Slope:m=3/5. Show work Well, youknow the form is y= mx+b you are given m. You are given a point (0,5) Put that point into the ...
*May 20, 2007*

**Algebra**

Find the slope of any line perpendicular to the line through the points (0, 5) and (-3, -4). Show work Find the slope of the line thru the two points: slope= (y2-y1)/(x2-x1) you do that. Now the slope of the line perpendicular to this is the negative reciprocal, or ...
*May 20, 2007*

**Behavioral Science**

Choose a television character. Describe their personality from the view of the three theorists, Jung, Freud, and Rogers. watta wat? Since we do not know who you will select, we cannot be of direct help. It would be very helpful to you to review the discussion of these ...
*May 16, 2007*

**Algebra**

Give two examples of a real life situation where a straight line graph might be applicable and explain why you think this might be true. distance vs time under constant velocity overtime pay vs overtime hours worked.
*May 16, 2007*

**chemistry.**

I attempted to answer some but I jsut don't know if what I wrote is correct so will you please help me figure out these answers. Predict the effect that the following changes or stresses would have on the given equilibrium, a) CO2(aq) <=> CO2(aq) (Increasing ...
*May 16, 2007*

**Algebra**

Find the constant of variation k. yvaries directly with x; y=400 when x=1000 y = k x 400 = k * 1000 Solve for k
*May 14, 2007*

**-Chemistry-**

I have asked this question before but I was wondering if I solved this question correctly. A solution of barium chromate is prepared by dissolving 6.3 x 10-3 g of this yellow solid in 1.00 L of hot water. Will solid barium chromate precipitate upon cooling to 25°C? You ...
*May 14, 2007*

**CHEM!**

Okay well I suddenly got confused for a lab I did We took pH meter than we calibrate it. Then we measure the pH of the acetic acid solution, which was used to determine the Ka of the acetic acid using the first method. We made a 1M solution of NaOH which was used to titrate 50...
*May 9, 2007*

**Chemistry``**

I answered this question but I did not get the right answer. CO2 + H2 <=> H2O + CO CO2 = 0.5 mole and H2 he 0.5 mole both sollutions were forced into a 1 Litre container. K = 2 what is the equlibrium concentration of each reactant and product. as I calculated I did the ...
*May 8, 2007*

**Chemistry``**

A substance (CD) decomposes into C and D. CD(g) C(g) + D(g) At the temperature of the experiment, 15.0 percent of CD is decomposed when equilibrium is established. a) If the initial concentration of CD is 0.200 mol/L, what are the equilibrium concentrations of...
*May 8, 2007*

**Chemistry**

In a previous experiment, 0.800 g of the green complex iron salt was placed in an Erlenmeyer flask and heated with concentrated sulfuric acid until all oxalate ion was destroyed (CO2, SO2 and H2O are formed). Ferric ion (Fe3+) remained in solution and was reduced to Fe2+ by ...
*May 7, 2007*

**Chemistry**

Assuming the dissolution of borax in water is a spontaneous reaction, do you expect the change in enthalpy to be positive or negative or are both signs possible? Explain your answer A. Neither, enthalpy does not change, the positive entropy for the dissolution, leads to –...
*May 7, 2007*

**CHEM!**

Well I almost understand this question but still got stuck, I will show you the question and my answer so I need someone to tell me if I did it correctly or not and how I should fix it. at 55degrees the K for the reaction: 2NO2(g)<=>N2O4 is 1.15 calc the concentration of...
*May 2, 2007*

**CHEM!!**

One mole of NH3 was injected into a 1 L flask at a certain temperature. The equilibrium mixture
*May 2, 2007*

**Chemistry**

A solution of barium chromate is prepared by dissolving 6.3 x 10-3 g of this yellow solid in 1.00 L of hot water. Will solid barium chromate precipitate upon cooling to 25°C? Proof? You want to compare Qsp to Ksp (at 25o C.) Ag2CrO4(s) ==>2Ag^+ + CrO4^= Ksp = (Ag^+)^2(...
*May 2, 2007*

**Chemistry**

How can you increase the concentration of the product (s) in each of these reactions by varying the temperature and pressure (caused by volume change)? 4NH3 + 5O2 <=> 4NO + H2O Delta H = -903.75 kJ Br2 + Cl <=> 2BrCl Delta H = 14.64 kJ Please help... With gaseous ...
*May 2, 2007*

**graphing question**

Write the equation of the line with slope 4 and y-intercept (0, –5). Then graph the line i wrote the equation which i think is y=4x-5 i point the y intercept (0,-5) in the graph how do i find the other point would the 4x become 4/1 x y=4/1x-5 then move run and rise run of...
*April 13, 2007*

**algebra 1 help**

One number is 6 more than another. If the sum of the smaller number and 3 times the larger number is 34, find the two numbers. what am i suppose to do i am reading as this but i know i am wrong 34=(x+6)+y*3 n + 3(n+6)=34 n is the smaller. the sum of the smaller and three times...
*March 30, 2007*

**inequality expresion**

The cost of a long distant telephone call is $0.36 for first minutes and $0.21 each additional minutes or portion thereof. Write an inequality representing the number of minutes a person could talk with out exceeding $3.00 would this be written as 0.36+0.21(x-1)<$3.00 0.36...
*March 27, 2007*

**Statistics**

Part 2 - The president of the company is uncomfortable with the precision of the estimates derived for the sample mean. They are not willing to tolerate a very large error. e = .04, how large would the sample size have to be if they specify a 98% confidence level? Formula: n...
*March 13, 2007*

**Statistics**

An entertainment company owns and operates movie theaters in Wyoming. The president of the company is concerned that film rentals are hurting the business. They directed a staff member to estimate the total number of films rented by households in Wyoming in a particular month...
*March 13, 2007*

**Stats**

A bottling company uses a filling machine to fill glass bottles with mango juice. The bottles are supposed to contain 300 milliliters (ml). In fact the amounts vary according to a normal distribution with mean = 298 and standard dev = 3 ml. What is the probability that an ...
*March 13, 2007*

**Statistics**

A building contractor claims that they can renovate a 200 sq foot kitchen and dining room in 40 work hours plus minus 5 (the mean and standard deviation respectively). The work includes plumbing, electrical installation, cabinets, flooring, painting and installing new ...
*March 13, 2007*

**Statistics**

I'm desperate I don't know how to calculate this, I always get a different answer, someone give me step by step please. P(3)=P(x=3;n=5!p=0.5) =5! x(0.5)3x(1- P(3)=P(x=3;n=5!p=0.5) =5! x(0.5)3x(1-0.5) 5-3 = 031250 _______ 3!(502)!
*March 12, 2007*

**Econ-Returns to scale**

Determine whether returns to scale is decreasing, increasing or constant: Q = 2K + 3L + KL Take a shot. Hint: increase both K and L by, say 10%. Does Q rise by more than 10% (increasing), less than 10% (decreasing), or exactly 10% (constant)
*March 10, 2007*

**math ..PLEASE HELP !!!**

A local bank reports that 70% of its customers maintain a chequing acct, 50% have a savings acct and 40% have both.If a customer was chosen at random a) what is the probability customer has a chequing or saving acct b)probability the selected customer has neither c)probability...
*February 23, 2007*

**Statistics**

Restaurant built in Edmonton has 80% chance of 1 year. If built in St Albert survival falls to 65%.Estimated chance St Albert is available is 60% and Edm 40%. A)Probability the restaurant will survive 1 year B) be built in Edm and last 1 yr C) be built in St Albert , given ...
*February 21, 2007*

**Calculus help**

\documentclass{article} \usepackage{amssymb,amsmath,amscd,concmath} \pagestyle{empty} \begin{document} \begin{equation*}\int_{1}^{3} [(e^3/x)/(x^2)]\, dx\end{equation*} \end{document} Sorry,the html format does not work... How to find the integral of [e^(3/x)]/(x^2) from 1 to ...
*February 20, 2007*

**Plato's Allegory of Cave**

Has anyone read the Plato's Allegory of Cave before? I got an assignment which is write a journal after reading this, but I really did not understand what it is talking about. Can anyone tell me something about it? Thanks. This site may help you. http://en.wikipedia.org/...
*February 16, 2007*

**Chemistry**

Is dissolving salt in water an example of reversible? I don't think so because once salt is in water, the water is not clear anymore. Pls help. thanks. Yes, it is reversible. One ca physically separate the salt and water (evaporation) What do you mean by not clear? When ...
*February 14, 2007*

**Science**

Wil kinetic energy increase or decrease based on the amount of potential energy it starts with?? If potential energy is lost, KEnergy increases. Potential Energy + kinetic energy= constant.
*February 5, 2007*