Monday
October 20, 2014

Posts by sarah


Total # Posts: 4,171

Math
Nevermind I got the answer
February 10, 2014

Math
We'll, this is the whole problem: Use substitution to solve for x and y: {5x - 3y =1 {7x - y = -5 The answer is suppose to be (-1,-2)
February 10, 2014

Math
How would you plug it into 5x - 3y = 1 Would it be: 5x - 3(-5 - 7x) = 1?
February 10, 2014

Math
Rearrange before substitution: 7x - y = -5 Would it be: -y= 5 - 7x?
February 10, 2014

Math- urgent
If slope= 4;(3,8) what would be the equation in point-slope form? Please show your work.
February 5, 2014

physics
Consider a swimmer who wants to swim directly across a river as shown in the figure below. If the speed of the current is 0.29 m/s and the swimmer's speed relative to the water is 0.64 m/s, how long will it take her to cross a river that is 14 m wide?
February 4, 2014

Science
What are Antibiotics?
February 3, 2014

Fast Way to Multiply Numbers ending in 0?
Is there any trick to quickly multiply numbers ending in 0 - like 280 x 20?
February 1, 2014

Math Ratio
If 8 pounds of hamburger feeds 5 people for 7 days, how much meat is required to feed 7 people for 8 days?
January 31, 2014

Biology
During the ______ pathway, a host cell infected with a virus lyses and releases new virus particles. During the _______ pathway, viral DNA replicates along with the cell, but new viruses are not immediately produced. Please help!
January 30, 2014

Biology
Viroids typically infect plant, while prions typically infect nervous system. Is this correct? thanks!
January 30, 2014

physics
Four charges −8 × 10^−9 C at (0 m, 0 m), −7 × 10^−9 C at (5 m, 1 m), −1 × 10^−9 C at (−2 m, −3 m), and 2 × 10^−9 C at (−2 m, 4 m), are arranged in the (x, y) plane as shown. Find the magnitude ...
January 29, 2014

Chemistry
From data below, calculate the total heat (in J) associated with the conversion of 0.265 mol ethanol gas (C2H6O) at 451°C and 1 atm to liquid ethanol at 25.0°C and 1 atm. (Pay attention to the sign of the heat.)
January 29, 2014

MATH MATH
how can you tell if an equal share is more than one whole?
January 24, 2014

American History
The development of WA state was one of the effects of the fur trade. Explain what the positive and negative effects of WA's development were.
January 22, 2014

science(answer please)
Number 3 is b.
January 22, 2014

Eng 2
it's A)
January 21, 2014

Physics
Attempting to stop on a slippery road, a car initially moving at 80 km/h skids at 30° to its initial motion, stopping in 3.9 s. Determine the average acceleration in m/s2 in coordinates with the x-axis in the direction of the original motion and the y- axis toward the side...
January 21, 2014

Math Ms.Sue Broken Down
l -(-5)^2 l [( -5) - (-2)] + [(-5)^3 + (-2)] Ms.Sue i broke it down more! Hopefully that helps
January 20, 2014

Math! Ms.Sue Please
Evaluate: l-x^2l (x - y) + (x^3 + y) If x + 8 = 3 and y = 3_ \l 8 Is the answer -202? I did it in the calculator but forgot how to work it out
January 20, 2014

Algebra/Math
Evaluate: l-x^2l (x - y) + (x^3 + y) If x + 8 = 3 and y = 3_ \l 8 Is the answer -202? I did it in the calculator but forgot how to work it out
January 20, 2014

Algebra/Math
Evaluate: l-x^2l (x - y) + (x^3 + y) If x + 8 = 3 and y = 3_ \l 8 Is the answer -202? I did it in the calculator but forgot how to work it out
January 20, 2014

Business-Need help!
1. Regarding Mexico's Porfirio Díaz, which statement is true? A. He enacted laws that favored wealthy elites. B. He overthrew the Mexican Revolution of 1910. C. He freed many peasant farmers from debt peonage. D. He reformed the hacienda system. 2. In the 1840s, the...
January 15, 2014

Business Management
In Korea, between 1750 and 1790, the slave population _______ as agricultural productivity increased. A. increased dramatically B. decreased slightly C. increased slightly D. decreased markedly I believe it would be increased dramatically
January 15, 2014

Math help me quicckly
An arc of length 30 meters is formed by a central angle A on a circle of radius 15. The measure of A in degrees (to two decimal places) is (Points : 5) 0.50 28.65 114.59 0.01
January 14, 2014

TRIG,
Can you solve and show me the work in these two equations? cos(3x)=-1 tan (theta)=-1
January 12, 2014

SCIENCE HELP PLEASE
Suppose the moon rotated on its axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *HELP ME PLEASE*
January 8, 2014

Maths
At 9.30 a.m., a car left town X for town Y at a speed of 60km/h for the whole journey. At 11 a.m., a lorry started from town Y and travelled towards town X. The speed of the lorry remained the same until it passed the car at 12.30 p.m. The lorry passed the car at midpoint ...
December 30, 2013

Art
Thank you! This was more of a personal question. I couldn't find the answer online. I recently drew a Rubik's cube and was unsure of what paint to use when proceeding to fill the blocks in.
December 18, 2013

Art
What type of paint out of the following three: 1.) Acrylic Paint 2.) Oil Paint or 3.) Watercolor; would you recommend gives the best glossy/shiny finish?
December 18, 2013

English
B?sees the mob as cruel and undiscriminating
December 16, 2013

English
In a typical Hawthorne world of moonbeams and shadows, the greatest pain for the Kinsman is not the tar and feathers, an extremely painful procedure, but making eye contact with the nephew to whom he had portrayed himself as a big shot. Most Americans have been taught to cheer...
December 16, 2013

English (SCARLET LETTER)
Awesome. thanks!!
December 16, 2013

English (SCARLET LETTER)
Arthur is Dimmesdale by the way. So you don't get confused. thanks!
December 16, 2013

English (SCARLET LETTER)
That overview you provided is the third scaffold. But if you have time, can you read the passage below?? The second scaffold scene is directly in the middle of the novel. Dimmesdale is wandering around town at night feeling guilty and tests out the scaffold. What would it be ...
December 16, 2013

English (SCARLET LETTER)
Or, is it D? confessing everything?? Because it looks like he wants to confess but something is holding him back.
December 16, 2013

English (SCARLET LETTER)
Yes, I checked here as well. But I just can't seem to get understand the second scaffold scene. I am debating between answer A and C.
December 16, 2013

English (SCARLET LETTER)
We are reading the story, THE SCARLET LETTER, in class and I am confused on this question. From my understanding, Dimmesdale gets on scaffold and imagine what would be to tell the truth about his sin but then all of the sudden Hester and Pearl walks by. But I don't think ...
December 16, 2013

college chemistry
If 100.0 mL of 0.0025 M Na2SO4 (aq)is saturated with CaSO4 how many grams of CaSO4 would be present in the solution? [Hint: Does the usual simplifying assumption hold?]
December 12, 2013

Math help,plz :(
Bob is making a scale drawing of his garage which is 10 yards long.If 1/2 inch represents yard, how many inches long should the drawing be?
December 12, 2013

College Algebra
The equation for the total revenue earned by a company for selling widgets is p=3q. The equation for the total cost of the company for producing widgets is p=q+4. Identify the break-even quantity.
December 11, 2013

College Algebra
Pencils cost 20 cents and pens cost 50 cents. Mabel buys x pencils and y pens, spending $2.00. what is the slope and what does it represent? what is the y-intercept and what does it represent?
December 11, 2013

College Algebra
Pencils cost 20 cents and pens cost 50 cents. Mabel buys x pencils and y pens, spending $2.00. Write an equation in slope-intercept form that expresses y in terms of x. slope= -2/5 what does it represent? y-intercept= 4 what does it represent?
December 11, 2013

Science
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December 11, 2013

Science
You are creating a carbon cycle poster. In which direction would you draw arrows to show the movement of carbon through the process of respiration?
December 11, 2013

College Algebra
50 gallon barrel plumb full of water springs a leak in the bottom and leaks at a constant rate of two gallons per minute. y=50-2x slope=-2 what does it represent? y-intercept=50 what does it represent? x-intercept=25 what does it represent?
December 11, 2013

College Algebra
The letters in the word probability are written on separate slips of paper. Find the probability of drawing two i's in a row without replacement.
December 11, 2013

College Algebra
The letters in the word probability are written on separate slips of paper. One slip of paper is drawn at random. Find P(b)
December 11, 2013

College Algebra
Find AC A= 2 3 0 4 1 6 C= 2 3 0 1 1 0
December 11, 2013

College Algebra
If CI=C, find I C= 2 3 0 1 1 0
December 11, 2013

College Algebra
Line m passes through (2,5) and (-3,-2). Find the slope of a line that is perpendicular to line m.
December 11, 2013

College Algebra
They didn't line up correctly. I reposted the correct way.
December 11, 2013

College Algebra
Find AC A= 2 3 0 C= 2 3 4 1 6 0 1 1 0
December 11, 2013

Math- urgent
Solve for x. 8x-(8+6x)=20 Please show your work.
December 10, 2013

Math- urgent
Solve for x. x+4 (x+3) =17 Please show your work.
December 9, 2013

math
an ice cube that is 8 cm on each side is melting at a rate of 4 cm^3 per min. how fast is the length of the side decreasing?
December 9, 2013

math
find the standard deviation for the following: 8,5, 12, 8, 9, 15, 21, 16, 3. There is a formula but our teacher wants us to do it a specific way. For example, 47, 41, 32, 53, 57. First you find the mean, which is 46 and then subtract it with each number in the set so you get 1...
December 8, 2013

math
how do you do it the way i showed above? because our teacher doesn't want us to use the formula
December 8, 2013

math
find the standard deviation for the following: 8,5, 12, 8, 9, 15, 21, 16, 3. There is a formula but our teacher wants us to do it a specific way. For example, 47, 41, 32, 53, 57. First you find the mean, which is 46 and then subtract it with each number in the set so you get 1...
December 8, 2013

Young ScholarsAcademy
Quention and suani went to ray house of food dinner . their bill was $64 to which they added a 15%tip. how much did they pay in total
December 3, 2013

College Algebra
A= [2 3 0] [4 1 6] 1. what is the additive inverse of A? 2. find 3A.
December 3, 2013

College Algebra
Line m passes through (2,5) and (-3,-2) Find the slope of a line that is perpendicular to line m.
December 3, 2013

College Algebra
Find the probability of drawing two i's in a row without replacement.
December 3, 2013

chemistry
convert 3.0m to yd
December 1, 2013

Physical Science
Magnetite
November 26, 2013

Instructions
The teacher gave us a mini essay that has 16 questions under each chapter (Chapters 1-4, 4 questions per chapter). Her instructions are as follows: "Below you will find short-essay-type questions from each of the Unit 2 chapters. Please select and respond to any ONE ...
November 26, 2013

math(help)
In order to do fractions, you need to find the common denominator [bottom number]. IF they don't match then you have to multiply both of the numbers to have the same number. For example questions 3 and 4 both have a common denominator, thus its easy to calculate. 3) (7/15...
November 26, 2013

physics
v = 50 m/s h = 100 m = x x = 1/2 at^2 t = (square root) x/(1/2) t = 4.51 s Vi = 50 m/s so you have to find the final speed if you want to find the angle of projection, vi = 0 m/s i think cannot be zero vf^2 = vi^2 + 2ad I'm sorry you're going to have to look up this. ...
November 26, 2013

maths
Are you trying to solve for y?
November 26, 2013

Math
To calculate the mean we add up all of the numbers and divide by the total number amount for e.g. you have 5 numbers here. Add them up and divide by 5 b) The standard deviation is that complicating equation. You can check this on google to get the exact formula and i think if ...
November 26, 2013

poiseuille's law
GIVEN: L = 3.0 cm = 0.03 m r = 0.3 mm = 0.0003 m (delta) y = 1.0 m 1 pint = 500 cm^3 [approx.] given a) Find the rate of flow, F = ? b) How long will it taken to inject 1 point of blood, t = ? a & b) I know we need to find the pressure or speed. F = (P at) (A) = (P at ) (pie...
November 26, 2013

Math
5 times 0.15 show on a grid paper.
November 25, 2013

College Algebra
Identify a different point on the line (with whole number coordinates) and tell what it represents.
November 21, 2013

College Algebra
The equation for the total revenue earned by a company for selling widgets is p=4q. The equation for the total cost of the company for producing widgets if p=q+6. Find the break-even quantity.
November 21, 2013

College Algebra
The equation for the total revenue earned by a company for selling widgets is p=4q. The equation for the total cost of the company for producing widgets if p=q+6. Graph p=4q
November 21, 2013

College Algebra
Mints cost 5 cents each and gumballs cost 3 cents each. Kathleen spent 60 cents buying x mints and y gumballs. Slope intercept form: y=-5/3+20 What is the slope and what does it represent in this problem?
November 21, 2013

College Algebra
Mints cost 5 cents each and gumballs cost 3 cents each. Kathleen spent 60 cents buying x mints and y gumballs. Slope intercept form: y=-5/3+20 What is the y-intercept and what does it represent in this problem?
November 21, 2013

Organic Chemistry Help Please
We're going over the reactions involving Alkenes and Alkynes. However, I'm extremely confused I how to determine with solvent/solvents to use and also when already given the solvents with the reactants how this will effect the products. I studied the basic mechanisms ...
November 20, 2013

Math- urgent
Thank you.
November 17, 2013

Math- urgent
-3 (x-8)+7x=12 What does x equal? Please show your work.
November 17, 2013

Math- urgent
X+4÷7=-2 What does x equal? Please show your work.
November 17, 2013

Calculus
Suppose that a population develops according to the logistic equation dP/dt = 0.06P−0.0001P^2 where t is measured in weeks. 1) The carrying capacity is . 2) The growth rate k is . Use your calculator to sketch a direction field for this equation. Sketch the solutions ...
November 17, 2013

Math- urgent
Thank you.
November 17, 2013

Math- urgent
X-30=14-3x What does x equal? Please show your work.
November 17, 2013

Math- urgent
1/2 (8-6h)=h what does h equal? Please show your work.
November 17, 2013

Math- urgent
-4x-2+3x=4 What does x equal? Please show all work.
November 17, 2013

AP Stats
Viruses are infectious agents that often cause diseases in plants. Different viruses have different potency levels, and this fact can be used to detect whether a new virus is infecting plants in the field. In a potency comparison experiment, two viruses were placed on a ...
November 12, 2013

math
Why is the point 3,0 not considered to be in any of the quadrants?
November 11, 2013

Calculus!!!
Find f. (Use C for the constant of the first antiderivative and D for the constant of the second antiderivative.) f ''(x) = 8 + x3 + x5
November 7, 2013

math
The temperature on one day in January for Phoenix, AZ, is 52 degrees Fahrenheit. On the same day in Barrow, AK, the temperature is -23 degrees Fahrenheit. What is the difference between these two temperatures?
November 6, 2013

Math
How many ways can you arrange the order of 4articles on a shelf?please explain why it is 4 x3x2x1,thanks
November 4, 2013

Physics problem
An object with a mass of 100kg is dropped from an 80 meter high building and leaves an impression in the ground of 15cm. A.What is the time needed to hit the ground? B. What is the speed of the object when it hits the ground? C. What is the coefficient of the friction between ...
November 1, 2013

Physics problem
An object with a mass of 100kg is dropped from an 80 meter high building and leaves an impression in the ground of 15cm. A.What is the time needed to hit the ground? B. What is the speed of the object when it hits the ground? C. What is the coefficient of the friction between ...
November 1, 2013

Math- urgent
One more than 3 times a number is the same as 5 times the number, decreased by 15. Find the number. • Assign the variable • Write an equation • Solve equation
October 30, 2013

stats
The population (in millions) and the violent crime rate (per 1000) were recorded for 10 metropolitan areas. The data are shown in the following table. Do these data provide evidence to reject the null hypothesis that ƒÏ = 0 in favor of ƒÏ ‚ 0 at...
October 30, 2013

history
I'm having a debate about gay marriage. & I'm arguing that people should have the right to marry who they please because church & state are separate & the constitution grants people rights, including marriage rights. If my opponent says then if everyone has rights, why...
October 30, 2013

University of Belize
5. A 0.500 g sample of a BaCl2•2H2O/Na2SO4 salt mixture, when mixed with water, filtered, and dried, produced 0.225 g of BaSO4. The Na2SO4 was determined to be the limiting reactant. a. Calculate the mass, in grams, of Na2SO4 in the mixture. b. Calculate the mass, in ...
October 29, 2013

Physics
On a cloudless day, the sunlight that reaches the surface of the earth has an intensity of about 1.2 103 W/m2. What is the electromagnetic energy contained in 6.4 m3 of space just above the earth's surface?
October 28, 2013

US History
How did immigration change after 1890?
October 27, 2013

General Physics 2
Type A dead battery is charged by connecting - PHYSICS HELP? in google search and you'll find a question similar to this on July 17, 2011 good luck
October 27, 2013

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