Friday

March 27, 2015

March 27, 2015

Number of results: 39,278

**algebra**

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -x – 8y = 43 4x + 32y = 172
*February 22, 2011 by Joel*

**Algebra**

using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 3x + 24y = 24 27x – 15y = -15
*March 23, 2011 by Miguel*

**math**

Compute the following limit: sqrt x+4 -2/x lim x-->0 the x+4 is the only thing under the square root. the answer is .25, but id like to know how to work this out
*April 27, 2011 by Anonymous*

**physics**

which of the following properties of a sound wave determines its pitch: wavelength, speed, amplitude, or frequency? Plese show work, Thank you, Silly
*May 2, 2011 by silly*

**Math- Problem3**

Solve the following inequality and write your answer using interval notation. Please show all of your work. (1 / (x+8) ) ≤ ((8-5x)/43)
*June 9, 2011 by Greg - PV*

**Physics**

How much work is done to move a 1400 kg car from rest to 25 m/s.If this takes place over a distance of 130 m, what is the average net force?
*July 23, 2011 by Aditya*

**intermediate algebra**

Solve using the elimination method. Show all work. If the system has no solution or an infinite number of solutions, state this. 3x+7y=77 -2x+7y=42
*July 30, 2011 by ROCKY*

**Chemistry**

Give the physical state of CO2 under the following conditions: pressure = 4000 mmHg, temperature = 18 degrees F. show work!
*September 6, 2011 by Sarah*

**physical science**

A 65 kilogram person stands on a diving board 15 meters above the water. figure the GPE. show formula and work
*September 18, 2011 by Alexis*

**Stats**

Rank the following data in increasing order and find the position and value of the 56th percentile. Please show all of your work. 0 1 6 8 9 9 8 6 3 1 0 9
*October 15, 2011 by Jennifer*

**chemistry**

Consider the reaction Mg +2HCl ------>MgCl2 + H2 What is the minimum amount of 1.85M HCl is necessary to produce 28.5L of H2 at STP Please help me work this problem
*November 6, 2011 by swtnblk*

**algebra**

perform the indicated operation and if possible,simplify please show all of your work. write your answer in lowest terms. 18/35 divided by 22/25
*November 7, 2011 by Angela*

**algebra**

Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 3x – 15y = -12 3x + 24y = -12
*November 14, 2011 by Linda*

**College Pre-Algebra**

Solve -14x-7(4-x)< 3(2x-15). Write your solution using set builder notation. Please show all of your work.
*November 22, 2011 by Kameesha*

**Calc**

Evaluate the function at the given values of the independent variable and simplify. f(x)= {x^2)-3 if x is less than or equal to -2 {6x+1 if x > -2 a. f(-3) b. f(0) c. f(-2) How do I solve this/what are the correct answers so I can check my work?
*December 14, 2011 by Jillian*

**math/ calculus**

full work out with explanation of this problem please we're working with derivatives and i dont understand it given h(x)= cotx/x find h'(pi/2)
*December 20, 2011 by Angie*

**operations management**

a small business contactor has recently experienced two successive years in which work oppotunities exceeded the firm's capacity.
*December 27, 2011 by Anonymous*

**algebra**

Solve the following inequality and write answer using interval notation. Please show all of your work. 2x-5/3x^4-x^3+275x-125>=0
*January 18, 2012 by sarah*

**Math**

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 10x + 5y = 52.5 30x – 7y = 80.5
*February 5, 2012 by Shirley*

**algebra**

I am not asking directly for the answer to this problem, I just need help understanding how to work it. Which of the following rules could be used to describe the function on the table below? X | Y -1|-1 0 | 1 1 | 3 a) f(x) = 2x b) f(x) = 2x - 1 c) f(x) = 2x + 1
*February 17, 2012 by Amy*

**voc 3**

She worked really hard on the project. The suffix -ed in the italicized word in the sentence above illustrates that the work happened in the past tense.
*March 7, 2012 by desha*

**geometry**

The perimeterof a square is 32 inches. Find the lenght of its diagonal. the answers should be in simplest form. make a sketch and show work.
*March 21, 2012 by rob*

**Pre-Calc**

For the triangle shown, find the length AD. (Assume u = 18, v = 18, x = 10°, and y = 10°. Round your answer to two decimal places.) Show work please!!!
*April 2, 2012 by Mike*

**physics**

A 2 kg metal plate slides down a 14-meter high slope. At the bottom its speed is 11.1 m/s. To the nearest Joule, what was the magnitude of the work done by friction?
*April 15, 2012 by 18*

**physics**

A ball its thrown straight up into the air at 50 m/s find the balls velocity after 8 seconds show all work please
*May 3, 2012 by lisa*

**statistics**

If the average number of textbooks in professors offices is 16 with a standard deviation of 5; and the average age of professors is 43 with a standard deviation of 8. Calculate the covariance of the number of textbooks in professors offices (show your work and formulas used) ...
*May 10, 2012 by Leannes*

**physics**

question # 1 :Estimate the work you do to mow a lawn 13m by 23m with a 60cm wide mower. Assume you push with a force of about 15 N .
*May 21, 2012 by kay*

**Math**

Which of the following CANNOT be the average ( arithmetic mean) of four positive even integers? a) 1 b) 2 c) 6 d) 9 e) 17 ( please explain or show work. It will help me understand it better! Thanks)
*August 15, 2012 by Sarah*

**satistics**

Rank the following data in increasing order and find the position and value of the 65th percentile. Please show all of your work. 2 1 6 3 4 7 0 0 0 7 5 8
*August 20, 2012 by latoya*

**math**

Hi guys I just need to simplify this equation and I keep eliminating all x's so I don't know if that is possible. Let me know if i'm right or were I went wrong...my work is below (2/x+2)-(x/x-2)+1 2(x-2)-(x)(x+2)+1(x+2)(x-2) 2x-4-x^2-2x+x^2-2x+2x+4 -4
*September 10, 2012 by Patty*

**Physics**

How much work did the movers do horizontally pushing a 160-kg crate 10.3m across a rough floor without acceleration, if the coefficient of friction was 0.50?
*October 23, 2012 by Lisa*

**Science**

While traveling along a highway a driver slows from 24 m/s to 15 m/s in 12 seconds. What is the automobile's acceleration? How would I show the work and find this answer?
*October 29, 2012 by Robert*

**math**

please explain how to use hundreds chart to answer this queston;WHAT % OF THE NUMBERS ARE MULTIPLES OF BOTH 2 AND 3? i have no idea how to work it out, thanks
*November 14, 2012 by wan*

**science**

Jai-Anna, who has a mass of 45 kilograms, climbed 3 meters up a ladder to rescue her cat from a tree. How much work against gravity did she do?
*November 15, 2012 by cristopher*

**calculus**

solve the following inequality. write your solution in interval notation. x^3+9x^2-108 less than or equal to 0 please show all work
*December 24, 2012 by Josh*

**science**

: how much work is done by 0.020 meters squared of gas if its pressure increases by 2.0 multiplied by 10 to the 5th power Pa and the volume remains constant ?
*February 27, 2013 by Chad*

**algebra**

Abby spent 5 1/2 minutes solving 5 math problems on her homework. How much time did she spend on each problem, on average? show your work.
*March 6, 2013 by syram*

**Physics**

A construction worker exerts 209N to move a load of bricks a distance of 10m across the parking lot,how much work does he do?
*March 19, 2013 by Anonymous*

**Physics**

A construction worker exerts 209N to move a load of bricks a distance of 10m across the parking lot,how much work does he do?
*March 19, 2013 by Anonymous*

**Science**

A construction worker exerts 209N to move a load of bricks a distance of 10m across the parking lot,how much work does he do?
*March 19, 2013 by Anonymous*

**science **

a 60.0kg boy runs up the stairs of a football stadium to a height of 12m above the ground 15s.what are the work and power student has done
*April 10, 2013 by melinda*

**Art Appreciation**

Compare Raphael's School of Athens with Veronese's Christ in the House of Levi. How did each work reflect the environments of Rome or Venice?
*April 22, 2013 by kendra*

**Hospitality**

A key difference between Social and Corporate event planner work is the days of the week that are usually worked. True or False
*May 7, 2013 by Jake*

**chemistry**

how many liters of oxygen are necessary for the combustion of 340 g of ethanol (c2h5OH) assuming the raction occurs at STP? no idea how to work this out
*May 18, 2013 by parker*

**anthropology**

Throughout the 19th century, stereotyping of work by sex had restricted women's employment. (Woloch, 2002). Is this a quote or paraphrasing?
*June 25, 2013 by vanessa*

**algebra**

Solve the system using elimination X+3y=5 4x+4y=4 I tried to work this problem and this is what I came up with. x+3y=5 x+4y=20 7y=15 y=7/15 and x= (5+y)/4 (5+7/15)/2 2/15 x=2/15 x=2/15, y=7/15 I would like for someone to check to see if it is correct.
*July 15, 2013 by angela*

**Chemistry**

Calculates the work done (in joules) when 42.8 g of tin dissolves in excess acid at 1.10 atm and 23 degrees Celcius. Assume ideal gas behaviour.
*September 19, 2013 by Vanessa*

**Chemistry**

Calculates the work done (in joules) when 42.8 g of tin dissolves in excess acid at 1.10 atm and 23 degrees Celcius. Assume ideal gas behaviour.
*September 19, 2013 by Vanessa*

**polynomials**

can someone please help me with this problem I have to get the sum diff and product I keep trying to work it out but i really think im blowing it. x^3- ¡¼2x¡½^2 + 3x-1 ¡Ă x^2- x+4
*September 21, 2013 by Rick *

**math/chem**

If aluminum foil has a density of 2.70 g/ml, then how thick would be a 2.22 g sample of foilif it measures 5.0 cm on each side. PLEASE SHOW WORK THX!
*September 27, 2013 by john*

**Phsical Science**

Which one is the best explanation of energy? A. making transformations B. the ability to do work C. conservation of power D. measuring joules I think it is B.
*February 17, 2014 by dark1*

**Algebra**

Use factoring and the zero-product property to solve the following problems: z(z - 1)(z + 3) = 0 x^2 - x - 10 = 2 4a^ - 11a + 6 = 0 9r^r - 30r + 21 = -4 Please show work. Thank you so much!
*February 20, 2014 by Kathy*

**English Grade 11**

Explain how the meaning of each of the following words is related to the root work -litera- mean "letter." 1. literate (adj.) 2. literature
*February 26, 2014 by Alex*

**phisecs**

A car must do work at a rate of 19 kW to maintain a constant speed of 29 m/s on flat ground. How large are the forces opposing its motion ? (In units of N)
*March 31, 2014 by eee*

**English**

Before leaving for the day, this work should be completed. A. Properly constructed sentence B. Dangler C. Misplaced part D. Comma splice A
*June 24, 2014 by Angela*

**English**

Before leaving for the day, this work should be completed. A. Properly constructed sentence B. Dangler C. Misplaced part D. Comma splice C
*June 24, 2014 by Angela*

**ESSAY ON MY FUNCTIONALISM AND STRUCTURALISM**

DO I JUST WRITE ABOUT WHO I AM AND WHAT I DO IN MY LIFE LIKE I AM A MOTHER A FRIEND A RECOVERING ADDICT? I WORK AT A BEHAVORIAL CENTER AND WHAT I DO THERE?
*September 9, 2014 by MISTY*

**Algebra help**

Find an equation of the line L, where L is perpendicular to y=3x and passes through the point (1,3) Please help I'm not sure what formula to use or how to work out this problem
*September 17, 2014 by B*

**Physical Science**

You are driving. You have enough gas in your tank to go 50 miles. The next town is 72 kilometers away. Can you make it? Show work.
*September 17, 2014 by Belle*

**algebra 1**

Find the x and y intercept of this equation: 10x-70y=210 I keep getting the wrong answer. Can you show me how to set it up and work it out?
*October 2, 2014 by Brainiac*

**Algebra 2**

More About Complex Numbers: Solve x and y 4x+5y+13i=7+(6x+5y)i Please show work because I had a hard time finding the answer
*November 18, 2014 by Alicia*

**english**

approximately what is the value of a Japan Yen compared to a dollar? Use estimation, and I need to show math work. I have no idea
*November 20, 2014 by Mia*

**physics **

a jogger does 2.5 *10^5 of work during an exercise routine. her internal energy decreases by 6.8*x10^5. how much heat did she absorb or give off?
*December 15, 2014 by innocent *

**Chemistry **

Find the molar concentration of 57.9 g of potassiuum chlorate dissolved in 975 mL of water my work c=nv (57.9/122.55)(975ml) and i got 460 is this correct
*December 16, 2014 by Greg*

**Math**

Solve and check. ( 3 marks) 5/(x-1) + 2/(x+1)=-6 Here's my work on it: 5/(x-1)+2/(x+1)=? 5/(-3/2-1)+2/(-3/2+1)=-6 Can you show how I would have found x in this situation and also if I went wrong anywhere.
*January 9, 2015 by Alex*

**Anthrpology**

Describe how this supposed work of art is also used in healing rituals and a visual reminder of their religious and mythologies within the culture
*February 6, 2015 by meme*

**physics**

a man raises a mass,m to a height ,h and then shifts it horizontally over a distance ,x. find the total work done against the force of gravity?
*February 12, 2015 by jaggu*

**math**

whats 9 plus 10 many people are saying 21? i dont get it is there another way? please answer me im really confused of the question i have no work to be shown
*February 19, 2015 by Eevee*

**Physics**

Please help me with this question How much work is done by a boy of mass 70kg who ran up a flight of 31steps each15m high. Take g=10m/s^2
*March 4, 2015 by Cassandra*

**Calculus**

∫ x^3 √(16-x^2) dx evaluated between [0, 4] I know this is solved using trigonometric substitution, but I'm not sure how to work it. Please show steps so I will understand.
*March 14, 2015 by Nick*

**calculus trig substitution**

∫ x^3 √(x^2+9) dx If you work it can you write the steps? I really don't like the way my teacher teaches it. Someone else doing it might help.
*March 14, 2015 by Allie*

**Statistics- quick! Is this right?**

I need to verify one of my answers quickly...the problem is: The mean annual salary for classroom teachers is $43,658. Assume a standard deviation of $8000. 1) Determine the sampling distribution of the sample mean for a sample of size 256. Interpret your answer in terms of ...
*November 1, 2007 by Laura*

**Career and education**

Describe the educational background/training necessary for that career. For example: 2-year college degree, Bachelor’s degree, graduate degree. What post-secondary routes could you take to get to that career? For example: attend a 2-year community college and transfer to a 4-...
*October 30, 2014 by Monkey55*

**Math: Equivalence Classes**

Let R be the relation on ℤ+×ℤ+ defined by (a,b)R(c,d) if and only if a−2d=c−2b. 1. Find an equivalence class that has exactly 271 elements. 2. Is it true that for every positive integer n, there is an equivalence class that contains exactly n elements? ...
*August 14, 2014 by procrastinationEquation*

**Physics**

An ice chest at a beach party contains 12 cans of soda at 3.05 °C. Each can of soda has a mass of 0.35 kg and a specific heat capacity of 3800 J/(kg C°). Someone adds a 7.15-kg watermelon at 25.0 °C to the chest. The specific heat capacity of watermelon is nearly the same as ...
*November 17, 2006 by Sara*

**science-chem- theory questions**

please, help me.. i think i know the answers, but i just want to make sure! i'd love your feed back :) 1) an air bubble is trapped in the tip of a buret before a titration. during the titration, the bubble is passed from the buret tip. will the reported volume of titrant used ...
*March 22, 2011 by sarah*

**Math.**

On any given day, there is a 30% chance that Jenny will wear jeans. If she wears jeans, there is a 60% chance that she will wear a t-shirt. A) determine the probability that Jenny wears jeans and a t-shirt on any given day. B)determine the probability that Jenny wears jeans ...
*July 11, 2013 by Tasha*

**Chem**

A mixture of chromium and zinc weighing .362 g was reacted with an excess of hydrochloric acid. After all the metals in the mixture reacted 225 mL of dry hydrogen gas was collected at 27 C and 750 torr. Determine the mass percent Zn in the metal sample. [Zinc reacts with ...
*February 25, 2007 by Jim*

**Physics**

Figure 18-46 shows a hydraulic lift operated by pumping fluid into the hydraulic system. The large cylinder is 40 cm in diameter, while the small tube leaving the pump is 1.7 cm in diameter. A total load of 2500 kg is raised 2.2 m at a constant rate. Neglect pressure ...
*December 5, 2012 by Drake*

**maths 2**

The original question I had was write arcsin4 in the form a+ib. I manage and understand how to get so far BUT How do I get from cosacoshb-isinasinhb=4 to 2m(pi)+/- iarccosh4 arcsin4 = a + b i ---> 4 = sin(a + bi) sin(a + bi) = sin(a)cos(bi) + cos(a) sin(bi) cos(bi) = cosh(...
*January 14, 2007 by Jake*

**precal**

Determine the quadrant in which theta lies: sec theta>0 and cot theta<0
*March 2, 2009 by Anonymous*

**algebra**

Determine which of the following lines, if any, are parallel or perpendicular: line a: 3y+x=6 line b: y=3x+2 line c: 3x+y=0
*January 3, 2011 by Blue13*

**math**

Determine the rule when gradient =2,x intercept =3 .can. anyone please explain,cause I know y intercept =c,but I don't know x intercept,thanks
*September 14, 2014 by wa*

**statistics**

in certain manufacturing processes parts must be machined tonwithin specified tolerences. the parts must have a mean length of of six inches plus or minus 0.26 inches .A SAMPLING PROCEDURE HAS BEEN ESTABLISHED to determine wether the ten parts are within the specified ...
*March 16, 2010 by deedee*

**Statistics in Psychology**

What is a proper Null and Alternative HypothesThe CEO of ABC manufacturing commissioned a study to look at the differences between the current salaries of her employees by employee job title. There were three job categories: clerical, custodial, and managerial. The study ...
*August 17, 2014 by Annette Hill*

**K**

(a) Find the indeﬁnite integrals of the following functions. (i) f (t) = 6 cos(3t) + 5e^−10t (ii) g(x) = 21-12x^3/ x (x > 0) (iii) h(u) = cos^2( 1/8 u) (b) Evaluate: (this big F sign at the start, 5 at the top and 1 at the bottom) 5 1/4x (7 + 6x^2) dx F 1 (c) (...
*March 24, 2008 by maths*

**Art**

How did his artwork reflects or defines his time period? In 1842, through friendly influences, vanderlyn he was commissioned by Congress to paint The Landing of Columbus. When he went to Paris, he hired a French artist, it was said that he did most of the work. Vanderlyn he ...
*April 15, 2009 by marcellous*

**Chemistry**

Given 2Al2O3 (s) --> 4Al(s) + 3O2 (g) (standard enthalpy change= 3351.4 kJ) a) What is the heat of formation of aluminum oxide? How do I find heat of formation from standard enthalpy change? I know how to do it when I'm given enthalpy, but they aren't the same thing- ...
*January 31, 2007 by Chris*

**Physics - Please help!**

Ironman steps from the top of a tall building. He falls freely from rest to the ground a distance of h. He falls a distance of h/ 3 in the last interval of time of 1.1 s of his fall. Hint: First, compute the velocity when Ironman reaches the height equal to the distance fallen...
*October 22, 2010 by Anonymous*

**Orgo**

Assume that during an extraction experiment you have lost track of which layer is the aqueous layer. How could you determine which layer is which by the use of a simple test?
*October 5, 2009 by Carrie*

**chemistry**

Determine the expression for the equilibrium constant for this equilibrium reaction: 2NO(g) + 2CO(g) (arrows)(in equilibrium with) N2(g) + 2CO2(g) PLease help anyone i really apreciate it Beccy
*January 8, 2011 by rebecca niles*

**Math-New Question**

One card is selected from a deck of playing cards. Determine the probability of selecting: a card greater than 9 or a black card
*July 26, 2011 by Jen*

**physics**

the velocity of a car increases from 36km/hr to 54km/hr in one minute determine the force exerted by the engine on the car mass of the car is 120kg
*August 21, 2011 by Anonymous*

**Trigonometry**

determine real numbers a and b so that the expression 8sin^2(theta) + 2cos^2(theta) can be rewritten as (a)sin^2(theta) + b? If you can help me out on how to start it would be great.
*August 28, 2011 by Andres*

**statistics**

Determine the 90% confidence interval for a sample, taken from a normally distributed population, that has a mean of 685, a sample standard deviation of 74, and a sample size of 29
*November 1, 2011 by Tierra*

**statistics**

Determine the 90% confidence interval for a sample, taken from a normally distributed population, that has a mean of 685, a sample standard deviation of 74, and a sample size of 29
*November 1, 2011 by Tierra*

**Trig**

Half Angle Identities cosx = 7/25 greater than 270 deg and less than 360 Determine cos 1/2x a. -7rt2/10 b. 7rt2/5 c.7/25 d.-4/5 I get 7rt2/5 Is this correct??
*January 2, 2012 by Don*

**physics**

A wave traveling in the + x direction has an amplitude of 0.35 m, a speed of 5.2 m/s, and a frequency of 14 Hz. Determine: 3.1.the wavelength, (2) 3.2.the wave number, (2) 3.3the angular velocity, (2) 3.4. the equation of the wave
*February 16, 2012 by joe*

**PHYSICS**

Determine the value for the acceleration due to gravity at the surface of the planet Mars, given the following data: Mass of Mars = 6 .42 x 10^23 kg Radius of Mars = 3.37 x 10^6 m Thanks!
*March 10, 2012 by Kelly*

**PHYSICS**

Determine the value for the acceleration due to gravity at the surface of the planet Mars, given the following data: Mass of Mars = 6 .42 x 10^23 kg Radius of Mars = 3.37 x 10^6 m Thanks!
*March 10, 2012 by Jake*

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