Friday

February 27, 2015

February 27, 2015

Total # Posts: 4,657

**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*

**physics**

I'm thinking to just divide 632 days by 87.1 days to determine the half-life
*October 24, 2013*

**physics**

If the physical half-life of sulfur-35 is 87.1 days, and the biologic half-life in the testicle is 632 days, what is its effective half-life in this organ? I know i have to find the time and then the half-life. But im having trouble finding the time A(t)=Ao x e ^ (-0.693) (t...
*October 24, 2013*

**Math**

v-7/5=2 What does v equal? Please show all work.
*October 24, 2013*

**Physics**

F incline= mg sin θ F incline = (4.7 kg) (9.81 m/s^2) sin (26) F incline = 20.21 N = 21 N Check to see at the back of the book if this is the right answer. If not go over the formula sheet and the problems in the book and so you'll realize the answer
*October 24, 2013*

**English Literature-Critical Thinking**

Animals should serve as models for us. They are gentle, cooperative, and family-oriented creatures who fight mainly over territory and mates and rarely kill one another. Humans being engage in group warfare and slaughter one another by millions. In fact, we stop behaving like ...
*October 24, 2013*

**Math - Urgent**

2/3x+1/2x=5/6+2x What does x equal? Please show all work.
*October 23, 2013*

**Math - Urgent**

3-2/9b=1/3b-7 What does b equal? Please show all work
*October 22, 2013*

**Math - Urgent**

3-2/9b=1/3b-7 What does b equal? Please show all work.
*October 22, 2013*

**Math - Urgent**

Yes, that is what I meant. Sorry for the confusion. Thank you.
*October 22, 2013*

**Math - Urgent**

3/4x+2=7+1/3x What does x equal? Please show all work.
*October 22, 2013*

**Math- Urgent**

Thank you.
*October 21, 2013*

**Math- Urgent**

Thank you I was confused because I had -8 as an original answer. How would you work 4x-9=6x-13?
*October 21, 2013*

**Math- Urgent**

2e= 4e-16 What does e equal? Please show all work.
*October 21, 2013*

**MATHS**

In 2006, the digits in Perry's age were the same as the digits in Laura's age, but in reverse order. In 2005, Perry was twice Laura's age. What is the difference between Perry's and Laura's ages?
*October 21, 2013*

**MATHS**

Please help! Pedro and Alice raced two model trains along two straight tracks. Pedro's train travelled 7.5 cm every minute. Alice's train travelled 7.5 cm every second. How many centimeters had Alice's train travelled when Pedro's train had travelled 2.75 ...
*October 21, 2013*

**Physics**

To win the game, a place kicker must kick a football from a point 40 m (43.744 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 23 m/s at an angle of 30.9◦ from the horizontal. The ...
*October 19, 2013*

**Physics**

A ﬁreman, 34.9 m away from a burning building, directs a stream jet of water from a ground level ﬁre hose at an angle of 44.2◦ above the horizontal. If the speed of the stream as it leaves the hose is 60.5 m/s, at what height will the stream of water strike...
*October 19, 2013*

**Physics**

To win the game, a place kicker must kick a football from a point 40 m (43.744 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 23 m/s at an angle of 30.9 ◦ from the horizontal. The ...
*October 19, 2013*

**Physics**

A five-sided object, whose dimensions are shown in the figure, is placed in a uniform magnetic field. The magnetic field has a magnitude of 0.72 T and points along the positive y direction. Determine the magnetic flux through each of the five sides. picture can be found on ...
*October 19, 2013*

**physics**

yes that's right, thank you very much.
*October 19, 2013*

**physics**

A cardiologist uses an ultrasound scanner with an operating frequency of 3.5 MHz that can detect Doppler frequency shifts as small as 0.1 kHz. What is the smallest flow velocity detectable with this device? Two frequencies are given so I know I have to convert the units but ...
*October 19, 2013*

**physics**

okay, one plane is flying north, straight up and the wind blows the plane east [right]. This is almost similar to pythagorean theorem. My guess is to use x^2 + y^2 = z^2. But im pretty sure there's a formula for this in the first or two chapters of the physics book. Look ...
*October 19, 2013*

**physics**

There is a relationship between momentum and energy KE = 1/2mv^2 p = mv m = p/v KE = 1/2 (p/v)v^2 KE = 1/2 pv From wiki answers The relation between kinetic energy is proportional to the square of velocity. Momentum is directly proportional to velocity. If the momentum of an ...
*October 19, 2013*

**Physics**

Find the potential energy when x = 0 or x = -1 Then using this energy then find speed using KE = 1/2mv^2 m = 1 kg
*October 18, 2013*

**Math- Urgent**

1/4 w=13 What does w equal? Please show all work.
*October 16, 2013*

**Math- Urgent**

Thank you.
*October 16, 2013*

**Math- Urgent**

Thank you. I have one more question. 1/4 w=-13
*October 16, 2013*

**Math- Urgent**

15=y+24 What does y equal? Please show all work.
*October 16, 2013*

**History**

Those are all good ideas. Thank you!!
*October 14, 2013*

**History**

My text doesn't say specifically anything, but I have to infer. For Portugal I found four things, but for Spain I only thought of that they had strong armies, they wanted to find the Spice Islands, and that they wanted to spread Christianity to non-Christian areas.
*October 14, 2013*

**History**

What are some factors that are responsible for the emergence of Portugal and Spain as the most dominant powers of Europe during the early 16th century? Make sure to have multiple factors for each country.
*October 14, 2013*

**math**

Anyone can help me on this qns? The Fourier series expansion for the periodic function,f(t) = |sin t|is defined in its fundamental interval. Taking π = 3.142, calculate the Fourier cosine series approximation of f(t), up to the 6th harmonics when t = 1.09. Give your ...
*October 13, 2013*

**maths**

make x the subject 1/4wxy-p=k
*October 13, 2013*

**Maths**

t (1/8x+p)=m Make x the subject
*October 13, 2013*

**Fourier Series**

A periodic function f(t), with period 2π is defined as,f(t) = c for 0 < t < πf(t) = -c for -π < t < 0where c = 1.4, Taking π = 3.142, calculate the Fourier sine series approximation up to the 5th harmonics when t = 1.63. Give your answer to 3 ...
*October 13, 2013*

**Physics**

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile ...
*October 11, 2013*

**Physics**

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile ...
*October 11, 2013*

**Physics**

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile ...
*October 11, 2013*

**Physics**

I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile ...
*October 11, 2013*

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