1. chemistry

    Are my answers correct? Identify each energy exchange as primarily heat or work and determine weather the sign of ΔE is positive or negative for the system. A. A rolling billiard ball collides with another billiard ball. The first ball (system) stops

    asked by Justin on April 8, 2014
  2. chemistry

    Are my answers correct? Identify each energy exchange as primarily heat or work and determine weather the sign of ΔE is positive or negative for the system. A. A rolling billiard ball collides with another billiard ball. The first ball (system) stops

    asked by Justin on April 8, 2014
  3. math

    A car rents for ​$45 per day plus 21 cents per mile. If x represents the number of miles Jorge drives per​ day, 45 plus0.21x represents the cost of the rental. If Jorge has ​$66 to spend for the daily car​ rental, what is the maximum number of

    asked by loreece on May 15, 2017
  4. Algebra (math)

    The graph represents function 1 and the equation represents function 2: A graph with numbers 0 to 4 on the x-axis and y-axis at increments of 1. A horizontal straight line is drawn joining the ordered pairs 0, 3 and 4, 3. Function 2 y = 4x + 1 How much

    asked by Winchester on January 4, 2017
  5. MATH URGENT!!!!!

    The graph represents function 1 and the equation represents function 2: A graph with numbers 0 to 4 on the x-axis and y-axis at increments of 1. A horizontal straight line is drawn joining the ordered pairs 0, 3 and 4, 3. Function 2 y = 2x + 1 How much

    asked by Anonymous on December 5, 2016
  6. Statistics Range, Variance, and Standard Deviation

    26. Flight Data: Find the range, variance, and standard deviation. Express answers using appropriate units, such as "minutes." Refer to Data Set 15 in Appendix B and use the times required to taxi out for takeoff. Flight 1 1 1 1 1 1 1 1 1 1 1 1 3 3 3 3 3 3

    asked by Alexis on May 10, 2016
  7. research and evaluation

    Give examples of both discrete and continuous data? What makes them different? Is the measurement of money continuous or discrete? Explain. Can discrete data be analyzed using the normal distribution? Why or why not?

    asked by sue on November 18, 2010
  8. Algebra (help please!)

    Suppose 3s represents an even integer. What polynomial represents the product of 3s, the even integer that comes just before 3s, and the even integer that comes just after 3s? A. 27s^3 + 12s B. 27s^3 - 3s C. 27s^3 - 12s D. 3s^3 - 12s My calculations are

    asked by Damsel-in-Distress on November 11, 2015
  9. internationa business operations management

    As the production manager for an electronic circuit company you have encountered the following situation. Part 1 A process for producing electronic circuits has achieved very high yield levels. An average of only 10 defective parts per million is currently

    asked by lisette on August 19, 2010
  10. science

    How would you design an experiment to determine which of two variables?

    asked by Brandi on September 26, 2008
  11. Science/Environmental Studies

    What are some dependent variables for Global Warming?

    asked by John Doswell on November 15, 2015
  12. Algebra

    In Algebra terms, what does "restrict the variables" mean?

    asked by Emma on October 14, 2011
  13. math

    How do you solve equations with variables on both sides?

    asked by Tolu on September 13, 2007
  14. math

    solve this in 3 variables.. i don't know where to start,,:(( y/4+z/3-x/2=4 y/2-x/6+z/15=2 y/8+z/5-x/3=2

    asked by rose on January 15, 2011
  15. math

    simplify and state the restrictions on the variables. a^3/(a+1)^2 + a/(a+1)^2

    asked by Barrie on December 3, 2007
  16. college

    What is an example of two variables that are likely to be correlated because they are both changing over time?

    asked by Anonymous on September 27, 2010
  17. math

    simplify and state the restrictions on the variables. 4/mn * m/2

    asked by Brittany on December 3, 2007
  18. Differential Equations

    How to solve y''+y=sin(x) by separation of variables?

    asked by Jefferson on February 23, 2018
  19. science

    Can some one help me with the simpsons controls and variables worksheet please,

    asked by Anonymous on October 5, 2008
  20. Algebra 2

    solve ax -3x + 5 = a+b for x. state any restrictions on the variables.

    asked by Zach on December 16, 2014
  21. statistics

    what are the variables of statistics according to functional relatipnships?

    asked by rhea on June 25, 2008
  22. math

    Simply the unknowns variables 5(2-c)=10(2c-4)-6(3c+1) 1.25y-20.5=0.5y-11.5 (3) 7p-3q=23(3)

    asked by Mike on May 3, 2014
  23. Algebra 1

    S = n/2(A+t) solve for A I don't undersand what to do with all these variables.

    asked by Sarah on October 18, 2010
  24. Math

    How would I solve equations with variables on both sides? Please help!

    asked by Tanner on February 11, 2013
  25. math

    How do you solve systems of inequalities in two variables?

    asked by kim on March 30, 2013
  26. finitie math

    2x+y+z=6 -3x-4y+2z=4 x+y-z=-2 solve the system of all variables using a matriz

    asked by crystal on June 26, 2009
  27. quantative

    Provide one pair of variables that might be related to one another

    asked by dana on August 17, 2011
  28. 6th grade science

    what is the purpose of testing variables I am stuck, can you help me?

    asked by nicki on June 6, 2009
  29. Math

    Define bound and free variables?

    asked by Hjm on August 17, 2013
  30. variables

    what makes variables difficult to understand?

    asked by randy on March 6, 2007
  31. Math

    How to find independent and dependent variables

    asked by M on December 10, 2014
  32. separation of variables

    solve the value problem by separation of variables dy/dx=x^2/y when y=-5 and x=3

    asked by jake on March 20, 2011
  33. math

    solve the system of equations in three variables -3x+y-z=-10

    asked by Laura on March 7, 2013
  34. Algebra

    I need some examples for exponents with variables and numbers.

    asked by Jaden K. on January 13, 2016
  35. Math

    This is about variables. The problem is d/2.5 - 3.4 = 4.6. What are the steps in finding out what the d is?

    asked by Makayla on May 20, 2013
  36. Quick math help

    How would you solve this factoring with two variables? -14x^2-7x+21

    asked by Anonymous on February 24, 2014
  37. algebra 1

    so i forgot how to get the variables on the same side in an equation such as x = y + 1 help?

    asked by lily on November 29, 2017
  38. Calculus

    Simplify, stating any restrictions on the variables: x+1/2x^2-7x+6 - x-3/2x^2-x-3

    asked by Jayson on February 22, 2019
  39. 6th grade

    What are scientific independent and dependent variables?

    asked by Jasmin Villegas on December 1, 2010
  40. Math

    I need help with this problem. Factoring with Two Variables h^2  9hs + 9s^2

    asked by Cheryl on September 6, 2010
  41. math-differential equations

    hi i need to know how to do this one thanks Find the solution to yx + x + (dy/dx) = 0 ; y(9) = -9 y = ???? Does this separate the variables? dy/dx=-x(y+1) dy/(y+1) = -x dx

    asked by kayla on August 5, 2007
  42. calculus

    how do you separate these variables dy/dx=4sqrt(y)lnx/x, y(e)=9

    asked by may on March 19, 2011
  43. Pre Algebra Plz help asap!-:)

    1.Which set represents a Pythagorean triple? 27, 38, 42 33, 44, 55*** 35, 38, 42 68, 72, 81 2.Which number completes the Pythagorean triple: 12, 16, ____? 18 20*** 22 24 3. Which set represents a Pythagorean triple? 1, 2, 4 2, 4, 6 3, 4, 10 5, 12, 13***

    asked by Labbayk on October 5, 2015
  44. algebra2

    evaluate h(-2/3) if h(x) = [[x-2]] (-2/3)-2 = -2.666666667 is this the right correct? If those are absolute value signs surrounding the x-2 on the right, then the answer is +2.666..= 8/3 why is it a positive 8/3 instead of a negative because you subtracted

    asked by anonymous on July 27, 2007
  45. math

    In 1990, the life expectancy of males in a certain country was 72.4 years. In 1994, it was 75.8 years...? Let E represent the life expectancy in year t and let t represent the number of years since 1990. The linear function E(t) that fits the data is

    asked by scooby9132002 on July 4, 2009
  46. health

    In plain English what does this mean? Thank you, There are two confidentiality rules (and their respective settings) in MICA. The first confidentiality rule affects suppression of the display of the entire inner table (i.e., the individual cells) of a

    asked by sofia on January 17, 2018
  47. College Physics

    A parallel plate capacitor is made of two 3.5 cm x 3.5 cm square plates that are separated by 1.6 x10 -5 m. The plates are charged to 4.8 nC each (positive and negative). An electron is released from rest at the surface of the negative plate and

    asked by Collin on February 8, 2012
  48. Math

    Can someone help me with this: Descibe how to construct a histogram for a set of data and Describe how to construct a box plot for a set of data

    asked by Jack on February 23, 2009
  49. chemistry

    Data: SO2(g) + ¨öO2(g) ¡æ SO3 (g) ¥ÄH = -99.1 kJ Given the above data, calculate the enthalpy change ¥ÄH when 89.6 g of SO2 is converted to SO3.

    asked by syd on October 16, 2011
  50. Math

    STATISTICS Why is collecting data on the same time everyday more accurate when compared to collecting data at different times everyday?

    asked by Suzanne on May 28, 2011
  51. Math

    Could someone explain how to graph the following problem? I don't quite understand what "Graph H for 0 ≤ t ≤ 3 and 300 ≤ H ≤ 340" is asking me to do... The National Oceanic and Atmospheric Administration (NOAA) has been measuring atmospheric carbon

    asked by anna on November 30, 2012
  52. Microeconomics - iso & indiff

    What does isoquant/isocost & indifference curve and budget constraint analysis have in common? I know that they both 'look' similar & both strive to find the same things "consumers want utility" & "producers want eco profits" (maximising both). What other

    asked by lostkid on November 7, 2006
  53. calculus

    s=-4.9t²+245t+14.7 s=-4.9(t²-245/4.9t)+14.7 s=-4.9(t²-50t)+14.7 s=-4.9(t²-50+625-625)+14.7 s=-4.9(t²-50+625)+(-4.9)(-625)+14.7 s=-4.9(t-25)²+30625.5+14.17 s=-4.9(t-25)²+3077.2 as you can see on the process of the problem on the part that

    asked by steve Alexander on October 29, 2008
  54. Stats

    I have tried to find the p value and z statitcs for each of the firms below and I am so confused becuase my answers arent making any sense. The randome sample is 40, the hypothesis we are testing is a lower tail test 35, pop st deviation is 6 and level of

    asked by Maya on September 23, 2018
  55. Math

    What are the similarities and differences between functions and linear equations? How do you graph functions on a coordinate plane? Is there an instance when a linear equation is not a function? Provide an example. Write a function for your classmates to

    asked by AR on February 22, 2010
  56. Math

    What are the similarities and differences between functions and linear equations? How do you graph functions on a coordinate plane? Is there an instance when a linear equation is not a function? Provide an example. Write a function for your classmates to

    asked by AR on February 22, 2010
  57. math

    How do you factor 2x^2-5x+2? (x-2)(2x-1) how do you figure that out? trinomials like that can usually be done intuitively, but you should have been taught a method that you can use for general cases. Look at the first term of 2x^2 and think where that can

    asked by George on May 2, 2007
  58. cosecant/secant

    the formula for secant is: 1/x the forumula for cosecant is: 1/y for the coordinates (negative square root of 2/2, square root of 2/2) how come the cosecant is square root of 2 and the secant is negative square root of 2? for my cosecant I got negative

    asked by Jen on February 2, 2008
  59. C++ Programming

    Design and create a class named Stats that has an array of 12 doubles as one of its member variables. The values in the array should be set by making 12 calls to a public member function named setValue that accepts two arguments, an integer indicating

    asked by kyuu09 on June 8, 2010
  60. 7th grade Math quick help Ms. Sue

    Can you check to see if tese are right? 1. What is 0.68 written as a simplified fraction? 68/100 17/25 100/68 34/25 2. Mrs. Whimsey’s class is having a pizza party. If there are 16 students and 4 pizzas cut into 8 slices, what answer choice represents

    asked by Delilah on October 3, 2012
  61. Regression

    Hi, Can anyone help me with a regression problem, I am doing energy species hypothesis ... I have calculated data and from f value of 22.39 have found the sq root of 4.73. 4.73 is significant at 1% c = f (x) = 0x + 2.2 ( not sure what this output means) I

    asked by Gary on June 2, 2009
  62. Math

    Can someone help me with these T.T 1.Which polynomial function would have the end behaviour of as x-> -∞, y= +inf and as x-> ∞, y-> -∞? a) f(x) = -6x^4 - x^5 + 5x^3 - x^2 - 4x + 9 b)f(x)= 6x^4 + x^5 - 5x^3 + x^2 + 4x - 9 c)f(x) = 3x^2 + x - 11

    asked by Jacob on December 8, 2011
  63. Help

    What role do genes play in brain development in the following. I am having hard time finding information. Gene-environment correlation Gene-environment interaction Epigenetic processes

    asked by Betty on February 7, 2018
  64. computer science

    Under the Von Neumann architecture, a program and its data are both stored in memory. It is therefore possible for a program, thinking a me mory location holds a piece of data when it actually holds a program instruction, to accidentally (or on purpose)

    asked by Tefo sello on September 12, 2014
  65. math

    find the linear function f(x(=mx+b whose graph has the given slope and y intercept. slope is +19/15 and y-intercept is (0,-4) the linear function is f(x)=

    asked by Anonymous on September 21, 2010
  66. math

    find the linear function f(x)=mx +b, whose graph has the given slope and y-intercept slope is -13/9 and y-intercept is (0.-6) the linear function is f(x)=

    asked by Anonymous on September 20, 2010
  67. Business Statistics

    Instructions: Prepare your answers using Excel and show your work to get full or partial credit. Question 1: Using the file Wages.xlsx which contains information of working individuals, for a nationwide firm (Value 7 points). a) Run Descriptive Statistics

    asked by Katie on December 14, 2011
  68. physics

    A rod with a length L = 0.385 m and a nonuniform linear mass density rests along the y axis with one end at the origin. If the linear mass density of the rod is given by λ = (5.00 ✕ 10−2 kg/m) + (1.50 ✕ 10−2 kg/m2)y then a) what is the total mass

    asked by Pissed off at this question rn on April 1, 2015
  69. HCT

    The data shown below shows the amount in dollars spent on groceries in one day by 30 people. 204 210 227 218 254 256 238 242 253 227 251 243 233 251 241 237 247 211 222 231 218 212 217 227 209 260 230 228 242 200 1 mark a. Is it a continuous or a discrete

    asked by abeer on March 7, 2012
  70. Math

    The mass of a cat is about 3.6 kg. Use the formula b  0.01m0.7 where b represents the brain mass and m represents the body mass. What is the approximate mass of the cat’s brain?

    asked by Amanda on July 13, 2015
  71. physics

    A small droplet of oil with mass of 1.84×10-15 kg is held suspended in a region of uniform electric field directed upward with a magnitude of 6625 N/C. Is the excess charge on the droplet positive or negative? NEGATIVE b.How many excess elementary charges

    asked by TP on September 1, 2011
  72. Math

    A car rents for $35 per day plus 20cents per mile. If x represents the number of miles jorge drives per day, 35+0.20x represents the cost of the rental. If jorge has $89 to spend for the daily car rental, what is the maximum number of miles he can travel

    asked by Bryan on November 9, 2008
  73. Math

    Using the Descartes Rule of Sign count the number of sign changes of f(-x) and determine the number of negative real zeros. 1. f(x)=x^3+x^2-10x-24 My answer: A few signs due change but not enough to say they changed." 0 sign changes of f(-x), which means

    asked by kim on October 24, 2014
  74. algebra/ please ck my answers

    Draw a stem-and-leaf plot for the data set. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values.) Data set A: The annual wages of employees at a small accounting firm are given in thousands of dollars. 50 15 18

    asked by Mary Ann on June 10, 2014
  75. Calculus Help

    I am given this data table: Time After Consumption (min): 30, 60, 90, 120, 150, 180 Amount of Codeine in Blood (mg): 27.0, 23.5, 21.2, 18.7, 16.6, 14.5 Question: I created a scatter plot of the data. How would I determine an equation to model the amount of

    asked by sandy on June 2, 2014
  76. QBASIC, Computers

    The following is a list of salaries of the six employees in a certain company: Name Salary T. Angel $43,000 F. Smith $31,000 K. Johnston $22,000 P. Miner $18,000 C. Altman $27,000 A. Lu $19,000 Read a single dimension array for name and another array for

    asked by Jason on November 29, 2012
  77. psychology

    An experimenter is studying how time spent on a cell phone affects people's ability to drive safely. Driving the car is the: dependent variable. coefficient of correlation. independent variable. operational condition. Im between C and D. Leaning toward C.

    asked by john on October 31, 2010
  78. Psychology

    An experimenter is studying how time spent on a cell phone affects people's ability to drive safely. Driving the car is the: dependent variable. coefficient of correlation. independent variable. operational condition. I think the answer is A but i am not

    asked by Chloe on March 14, 2011
  79. chemistry

    For AgI(s), would you expect the molar solubility to be a linear function of temperature? Why or why not? If not, how would you plot molar solubility and temperature to get a linear function?

    asked by julie on March 7, 2010
  80. statistics

    Using our data set from Unit 1, compose a 3-page e-mail to the head of the American Intellectual Union, which includes the following: 1.Begin your e-mail to AIU by first providing an overview of the database, that is, a story about the characteristics that

    asked by hilda on November 22, 2011
  81. Educational Technology

    Data cannot be sorted of filtered accurately if there are (fill in the blank) A. Even numbers B. Only data fields C. Blank fields or records D. Only catagory fields Is the answr D? Thank you

    asked by Callie on November 18, 2014
  82. english

    According to deterrence theory, criminals are no different from law-abiding people. Criminals [economist Paul H. Rubin writes] "rationally maximize their own self-interest (utility) subject to constraints (prices, incomes) that they face in the marketplace

    asked by Mary on October 13, 2009
  83. math 116

    In 1995, the life expectancy of males in a certain country was 65.3 years. In 1999 it was 68.8 years. Let E represent the life expectancy in year t and let t represent the numbers of years since 1995. the linear function E(t) that fits the data is,

    asked by angela on October 17, 2010
  84. Algebra 1

    In 1993, the life expectancy of males in a certain country was 67.2 years. In 1999, it was 70.3 years. Let E represent the life expectancy in year t and let t represent the number of years since 1993. The linear function E(t) that fits the data is E(t)=_t

    asked by Chasity on March 4, 2012
  85. Physics - pendulum negative work

    A 2.20 kg pendulum starts from a height of 5.00m. It swings back and forth through one whole oscillation but only returns to a maximum height of 4.75m. After a long time the pendulum eventually winds down and comes to a stop. How much total negative work

    asked by Tyger2020 on August 28, 2017
  86. Physics - pendulum negative work

    A 2.20 kg pendulum starts from a height of 5.00m. It swings back and forth through one whole oscillation but only returns to a maximum height of 4.75m. After a long time the pendulum eventually winds down and comes to a stop. How much total negative work

    asked by Tyger2020 on August 26, 2017
  87. Algebra

    Simplify each expression. Assume that no denominators are zero. Write each answer without using negative exponents. The ^'s mean they're exponents y^-3y^-4y^0 ------------

    asked by Katie on October 15, 2006
  88. Comm Tech

    1.)what is the purpose of a scatter plot? A.)To create a design like graph paper B.)To help visualize the relationship between two types of data C.)To sytematically compare three datasets D.)To add and subtract data in a worksheet 2.)What is Microsoft

    asked by YRN DJ on November 9, 2015
  89. physics

    i have to do an experiment to "determine the relationship between the angle of the rampand speed of an object sliding down it" i was told i had to have a few variables. -controlled(keep the same) -independent(change 1 thing) -dependent(measure 1 thing) so

    asked by bjc on February 3, 2010
  90. Physics

    A ball of radius 0.300 m rolls along a horizontal table top with a constant linear speed of 3.30 m/s. The ball rolls off the edge and falls a vertical distance of 2.50 m before hitting the floor. What is the angular displacement of the ball while it is in

    asked by Mary on April 24, 2007
  91. English

    1. If you are a bird, be an early bird And catch the worm for your breakfast plate. 2. If you're an early bird, you will catch the worm for your breakfast plate. (Does #1 mean #2 in meaning? a litle different?) 3. Be strong, and be healthy. 4. If you are

    asked by rfvv on October 24, 2011
  92. algebra

    Samir begins riding his bike at a rate of 6 mph. Twelve minutes later, Chris leaves from the same point and bikes along the same route at 9 mph. At any given time, t, the distance traveled can be calculated using the formula d = rt, where d represents

    asked by kat on October 17, 2014
  93. Bio Please Help

    For high quality representation of an analog waveform that varies between 10Hz and 100Hz, a digital data acquisition system will have to record data at what minimum frequency? a. 1000 sps b. 5000 sps c. 200 sps d. 100Hz e. 50Hz

    asked by Alex on May 23, 2010
  94. physics

    two -8.1 nC charges, are each separated by 5.0 mm from a proton. If the two negative charges are held fixed at their locations and the proton is given an initial velocity v, what is the minimum initial speed v that the proton needs to totally escape from

    asked by riiii on November 2, 2012
  95. Math

    Hello, For math I have to make a graph of two linear relations. One has to be the operating costs of a zoo or amusement park and the other cost of admission for me and my family. Using both linear relations I then have to find another relation that would

    asked by Gianna on July 3, 2011
  96. statistics

    Given the ensuing well drilling data, answer the following. [Reference: #4.78, page 172] • .30 (30%) probability of a productive well absent test information • Pre-drilling ballistics test ‘s affirmative result correctly predicts a productive well

    asked by sophia on October 25, 2007
  97. English

    The following sentence indicates what kind of bias: The best art can cut through our tendency to experience life with complacency and prejudgment? a)There is no bias. b)a positive bias c)a partly positive and partly negative bias d)a negative bias

    asked by Help on August 5, 2009
  98. physics

    You are planning to build a log cabin in northern Minnesota. You will pull the logs up a long, smooth hill to the building site by means of a rope attached to a winch. You need to buy a rope for this purpose, so you need to know how strong the rope must

    asked by nate on September 27, 2012
  99. math

    A building is 4 feet higher than twice the height of a nearby tree. If B represents the height of the building and t represents the height of the tree,

    asked by dajanai on September 29, 2011
  100. finance 3 questions

    Some analysts believe that the term structure of interest rates is determined by the behavior of various types of financial institutions. This theory is called the A. ANSWER Expectations hypothesis B. Segmentation theory C. Liquidity premium theory D.

    asked by Jason on July 25, 2008