Questions Asked on
March 23, 2014

  1. Chemistry

    For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm for all species. For the reaction 2NO(g) + O2(g) --> 2NO2(g) the standard change in Gibbs free energy is ΔG° = -69.0 kJ/mol. What is ΔG for this reaction at 298 K when

    asked by Janavi
  2. chemistry

    Calculate the concentration in % (m/m) of a solution containing 20.5 g of LiF dissolved in 340.0 g of H2O. a.1.14% (m/m) b.5.69% (m/m) c.6.03% (m/m) d.6.42% (m/m)

    asked by julia
  3. physics

    Assuming the Earth's magnetic field averages about 0.50×10−4 T near Earth's surface, estimate the total energy stored in this field in the first 15km above Earth's surface. The radius of Earth is 6380 km.

    asked by Jennifer
  4. chemistry

    In which of the following pairs of ionic compounds are both members of the pair soluble in water? a.AgNO3 and AgCl b.LiOH and Li2SO4 c.PbSO4 and BaCO3 d.NH4I and Sn3(PO4)2

    asked by julia
  5. English

    1. I will visit my uncle tomorrow. 2. I visit my uncle tomorrow. 3. I am visiting my uncle tomorrow. ---------------- Are they all grammatical? Does #2 mean #1 in meaning? Are #2 and #3 grammatical? Are they all the same in meaning?

    asked by rfvv
  6. social studies

    Which statement is most clearly subjective? A. In my view, the data support the professor’s assertions. B. My common sense tells me that money is the root of all evil. C. Wars are fought over ideas, land, and resources. D. It has been suggested that Nero

    asked by phia
  7. physics

    52.(52G) A 110-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 350 N. For the first 15 m the floor is frictionless, and for the next 15 m the coefficient of friction is 0.30. What is the final speed of the crate?

    asked by Martha
  8. social studies

    With respect to dealing with abstract concepts, which statement is most accurate? A. Emotions have no place in any kind of academic essay. B. An essay dealing with abstract concepts can appeal to intellectual curiosity. C. An essay dealing with abstract

    asked by phia
  9. material balance

    In a process for concentrating 1000kg of freshly extracted orange juice containing 12.5 wt% solids, the juice is strained, yielding 800kg of strained juice and 200kg of pulpy juice.the strained juice is concentrated in a vacuum evaporator to give an

    asked by maya
  10. physics

    A light bulb is placed 16.6 cm in front of a concave mirror. When the concave mirror is replaced by a plane mirror in the same location, the bulb's image moves 5.40 cm closer to the mirror. Calculate the focal length of the concave mirror. i know that for

    asked by Susy
  11. Biochem

    If .1ml of serum, 5ml of reagent and 4.9ml of distilled water are mixed together what is the dilution of the serum in the final solution

    asked by Dave
  12. Physics

    You have been asked to design a "ballistic spring system" to measure the speed of bullets. A bullet of mass m is fired into a block of mass M. The block, with the embedded bullet, then slides across a frictionless table and collides with a horizontal

    asked by Marie
  13. chemistry

    1. When performing this experiment, a student mistakenly used impure KHP to standardize the NaOH solution. If the impurity is neither acidic nor basic, will the percent by mass of acetic acid in the vinegar solution determined by the student be too high or

    asked by anonymous
  14. Math

    show that the quadrilateral with vertices at the following points is a parallelogram and find its area. a = (5,2,0), b = (2,6,1), c = (2,4,7), d = (5,0,6)

    asked by Muja
  15. physics

    The micrometer (1 μm) is often called the micron. (a) How many microns make up 1.5 km? (b) How many centimeters equal 1.5 μm? (c) How many microns are in 1.5 yd?

    asked by David
  16. Statistics

    )The random sample shown below was selected from a normal distribution Complete parts (a) and (b). Construct a 99% confidence interval for the population mean u. Round to two decimal places as needed.

    asked by Carol Harper
  17. College Chemistry

    A solution is saturated in both nitrogen gas and sodium iodide at 50 degrees C . When the solution is cooled to 25 degrees C what is most likely to occur?

    asked by Brandy
  18. social studies

    Which statement is most likely to be supported by objective data? A. In infancy, the color blue is associated with boys, and pink is associated with girls. B. When in doubt, punt; when certain, go for the goal on the fourth down. C. In my view, the

    asked by phia
  19. Math

    Two angles are complementary. Twice one angle plus the other is 96. Find the measure of each angle.

    asked by Mark
  20. PreCalc PLEASE HELP

    Ms Farnum was hired for a new job at a salary of $62,500 and was promised a 5% raise each year. What would Ms.Farnum's salary be, to the nearest dollar, after working there for 6 years?

    asked by Aly
  21. algebra 2

    you deposit $3500 in an account that earns 2.5% annual interest. Find the balance after one year if the interest is compounded with the given frequency.

    asked by Nekay
  22. Chemistry for health science

    Considering the neutralization reaction when nitric acid reacts with solid iron(II)carbonate. What is the minimum volume of 2.00 M HNO3 necessary to react completely with 1.06 kg of solid iron(II) carbonate, FeCO3 ?

    asked by Anonymous
  23. math

    maren walks 3/5 miles in24 minutes at a steady pace. how long does it take her to walk 2 miles

    asked by Janell
  24. social studies

    With respect to the principles of academic freedom, which statement is most accurate? A. Truth precedes beauty. B. Every lie contains a hidden truth. C. Ultimate truth is ever illusive. D. Truth is an abstract noun. My answer is D.

    asked by phia
  25. physics

    A runner is moving at a constant speed of 8.00 m/s around a circular track. If the distance from the runner to the center of the track is 28.2 m, what is the centripetal acceleration of the runner?

    asked by KT
  26. Chemistry

    if a glass of ice water is at equilibrium, what is its temperature?

    asked by Anonymous
  27. physics

    Earth is approximately a sphere of radius 6.37 × 106 m. What are (a) its circumference, (b) its surface area, and (c) its volume? please help

    asked by john
  28. physics

    A gry is an old English measure for length, defined as 1/10 of a line, where line is another old English measure for length, defined as 1/12 inch. A common measure for length in the publishing business is a point, defined as 1/72 inch. What is an area of

    asked by Ahmed
  29. Chemistry

    I need to balance the equation of the reactants NaHCO3->CuCl2 please help me.

    asked by Selina
  30. physics

    A particle moves along a straight line such that its position is defined by s = (t3 – 3 t2 + 2 ) m. Determine the velocity of the particle when t = 4 s.

    asked by Reem
  31. chemistry

    Consider the titration of 50.0 mL of 0.200 M HOCl by 0.200 M KOH for the next five questions (Ka for HOCl = 3.5 x 10-8). Calculate the pH after 150.0 mL of KOH has been added.

    asked by bekah
  32. Business Management

    Inventory cost at Tech Co. is 35 percent per year. What is the per unit inventory cost for an MP3 player sold at $50? Assume that the margin corresponds to the retailer's average margin.

    asked by Kelbo
  33. Physics

    Two parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts. (a) What is the electric field strength between them, if the potential 8.50 cm from the zero volt plate (and 1.50 cm from the other) is 540 V? (b) What

    asked by Sam
  34. Math

    Bella keeps a supply of red, blue, and black pens in a drawer. The drawer has 14 red pens, 18 blue pens, and 10 black pens. If Bella wants a red pen, what is the minimum number of pens she has to pull out from the drawer to make sure she gets a red pen?

    asked by Orko
  35. physics

    during a circus act, an elderly performer thrills the crowd by catching a cannon ball shot at him the ball mass is 10.0 kg and ball velocity is 8 m/s while the performer mass is 65 kg. if the performer is on nearly friction-less roller skates, what is his

    asked by Mohanad
  36. scholarship essay excerpt

    can someone edit this. It has to be short because my entire essay has to fit onto one sheet of paper. Sophomore year served as difficult as Freshman year,as my father’s disintegrating health following my mother’s death neglected to provide me a grace

    asked by christine
  37. Physics

    A doubly charged ion is accelerated to an energy of 33.0 keV by the electric field between two parallel conducting plates separated by 1.70 cm. What is the electric field strength between the plates?

    asked by Sam
  38. computer science

    a) What is the largest positive number that can be represented in 12 bits using one’s complement? Represent the number in bits and decimal as well. Assume the first bit is the sign bit. (2 marks)

    asked by lex
  39. chemistry

    In an experiment of hydrogen reacts with 110.0 g nitrogen gas, producing 100.1 g ammonia. a) How many grams of nitrogen will be left over?

    asked by meks
  40. mathematics

    -(x-4)(x-1)+5(3x-1)(2x+1) expand and simplify

    asked by johnson
  41. mathematics

    (x+3)(x+6)-2(x+1) Expand and simplify.

    asked by Anonymous
  42. Algebra II

    2c+6d=14 1/2c-3d=8

    asked by Melissa
  43. reading

    ok so im lost in my essay i don't know what to do i can't find one that i like i cahnged my subtopic to how the maycomb disease influenced the arrest, testimony, and verdict in Tom Robinsons trial. but when it comes to writing the body paragraph im lost

    asked by Reina B.
  44. MATH HELP!!

    3c-7d=-3 2c+6d=-34

    asked by Nina
  45. Ethical Dilemmas/Criminal Justice

    which statement about hypothetical imperatives is true?

    asked by george
  46. Business Calcules

    find a rectangular contains at least 231 cubic inches.the height of the box must be exactly 1/4th of the width of the box. the box is closed on all 6 sides. the surface area of the box minimized.?

    asked by jasmine
  47. math word problems

    A black pole 3 yd 2 ft long was 2 ft longer than a white pole. When part of the black pole was cut away, it was 1 yd 1 ft shorter than the white pole. How much of the white pole was cut away?

    asked by Anonymous
  48. Physics

    consider a toy car that you pullback to make it go forward. Is it a force multiplier or a distance multiplier? Defend your answer with the observations you could make

    asked by Ana (please help)
  49. Biomechanics

    Flexion of the elbow and supination of the forearm occur about what axes respectively?

    asked by Evelyn
  50. Physics

    explain the input energy and out put energies of two kitchen machines

    asked by demi :)
  51. Physics

    if you throw a 0.2 kg ball straight up at 8 m/s how high will it go

    asked by Ana
  52. Math

    If 1/3 of. My salary is in one bank, 1/5 in another and 1/6 in another how much I have left

    asked by DD
  53. essay please check

    ok can you check what i have on my essay

    asked by Reina B.
  54. Dramatic Scene

    When writing a script for a dramatic scene, are the characters listed horizontally or vertically?

    asked by Anonymous
  55. Chemistry

    When the oxide of generic metal M is heated at 25.0 °C, only a negligible amount of M is produced. O2M(s) ----> M(s) +O2(g) Delta G^o = 290.3 kJ/mol When this reaction is coupled to the conversion of graphite to carbon dioxide, it becomes spontaneous.

    asked by Janavi
  56. math

    Round 75.36 to the nearest unit I think the answer is 75

    asked by matt
  57. Calcules

    A company is selling 1 gallon blocks of orange juice. your task is to design a rectangle box ( prism) that meet all the criteria below: a) contains at least 231 cubic inches. b)the height of the box must be exactly 1/4th of the width of the box. c)the box

    asked by jasmine22
  58. Chemistry

    What factors control the bond length in a covalent bond? Select all that apply. -It involves the attraction between the two nuclei involved in the bond. -It involves the attraction between the electrons in the bond and the nuclei of the atoms. -It involves

    asked by Anonymous
  59. Chemistry

    How to use the octet rule to predict the formula of the simplest compound formed from hydrogen and selenium, (Write the formula with hydrogens)?

    asked by Anonymous
  60. math

    A company is selling 1 gallon blocks of orange juice. your task is to design a rectangle box ( prism) that meet all the criteria below: a) contains at least 231 cubic inches. b)the height of the box must be exactly 1/4th of the width of the box. c)the box

    asked by merfit
  61. Physics

    A stone is thrown in the air with an initial velocity of 50 m/s at 37 degrees to the horizontal. Find the total time the ball is in the air.

    asked by Jade
  62. math

    Anthony went to the store to buy soda. There was a sign that said, "15% off." The soda eas priced at $2.99 How much did the soda cost Anthony? If Anthony paid with a ten dollar bill, how much change did he receive?

    asked by Anonymous
  63. Plays

    Can a dramatic scene about a conflict in the story have just two characters?

    asked by Anonymous
  64. probability math question

    a bag contanins 7 red marbles, 2 blue marbles, and 1 green marble. What is the probabilty of choosing a marble that is not blue?

    asked by Anonymous
  65. Social Studies

    What is a quota system?

    asked by annonymous
  66. trigonometry

    how far from an 84 foot burning building should the base of the fire truck ladder be placed to reach the top of the building at an angle of 60 degrees with the ground. the ladder is mounted to the truck 8 ft off the ground

    asked by Anonymous
  67. trigonometry

    how far from an 84 foot burning building should the base of the fire truck ladder be placed to reach the top of the building at an angle of 60 degrees with the ground. the ladder is mounted to the truck 8 ft off the ground

    asked by alex
  68. physic30

    A charged glass rod is brought close to an insulated metal rod. The rod is momentarily grounded and then the ground is removed. This method of charging is called charging by ______? There is 3 ways; by friction, by conduction, and by induction. I think is

    asked by alejandro
  69. English

    If I wanted to describe the setting of a basketball court after a game, what are some things I might say?

    asked by Anonymous
  70. math word problems

    Package A weighs half as much as Package B. Package B weighs four times as much as Package C. The total weight of Package A and Package C is 648 grams. Find the weight of Package B.

    asked by Jiskha
  71. Physics

    A stone is thrown in the air with an initial velocity of 50 m/s at 37 degrees to the horizontal. Find the total time the ball is in the air. What would be the total distance traveled?

    asked by Anonymous
  72. Plays

    When I'm writing the list of characters in a dramatic scene, are the names of the characters capitalized?

    asked by Anonymous
  73. Algebra

    Hello, I hope all is well. I am hoping you can help. Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -7x^2 + 6x + 3.

    asked by Jerry
  74. Algebra

    Hello, This one as well. Thank you! Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -8x^2 + 3x + 9.

    asked by Jerry
  75. sociology

    1. In 2012, a wage earner was considered to be living in poverty if his or her annual wages were any amount below (Points : 1) $10,000,$13,000,$17,000,$23,000

    asked by miller
  76. Math

    two angles are complementary. Twice one angle plus the other is 96'. Find the measure of each angle.

    asked by Amy
  77. Math - Quadratics & Analytical Geometry

    I have a test tomorrow with a few sample questions that are expected to be on the test that I do not know how to properly do. 1)Find the slope intercept equation of the line passing through the intersection of the lines 2x-4y=1 & 3x+4y=4 and parallel to

    asked by Jay
  78. Math

    The perimeter of a rectangle is 46 cm. One side is 9 cm longer than the other side. Find the lengths of the sides.

    asked by Amy
  79. Math -Quadratics Help!

    I have a test tomorrow with a few sample questions that are expected to be on the test that I do not know how to properly do. 1)Find the slope intercept equation of the line passing through the intersection of the lines 2x-4y=1 & 3x+4y=4 and parallel to

    asked by JBregz
  80. Calculus

    Suppose you have a hot cup of coffee in a room where the temp is 45 Celcius. Let y(t) represent the temp. of coffee as a function of the number of minutes t that have passed since the coffee was poured a) write a differential equation that applies to

    asked by Stuck in Math
  81. Plays

    Are character descriptions such as the one below indented? [MARY looks nervous. She grabs her handbag and slowly leaves the house.]

    asked by Anonymous
  82. soc studies 3 questions pls help!!!

    8. Which of the resolutions at Seneca Falls Convention was most inspired by women’s inability to own property? (1 point) desire for improved education in order to understand property contracts belief that women should have voting rights in order to

    asked by TTR+S<3
  83. Trig

    The number of values in the interval –π ≤ x ≤ π that satisfy the equation sin x = 2 cos x is 1 2 3 4 0

    asked by Kiki
  84. Statistics

    The following is a list of 13 measurements: -38,-89,-47,-43,-70,59,92,97,23,-11,-62,-22,-5. Suppose that these measurements are respectively labeled X1,X2,...,X13 Find the sum when i=1 Xi/30.

    asked by Kenny
  85. Chemistry

    explain equilibrium in terms of the collision theory

    asked by Anonymous
  86. Global History

    Vietnam was not originally what France primarily wanted. Explain the value of Vietnam at the time. The time period is around the Vietnam war!

    asked by Brian
  87. Algebra

    x+y^2=5 2x^2+y^2=6 Solve by elimination.

    asked by Anonymous
  88. Physics

    Starting with an initial speed of 5.00 m/s at a height of 0.335 m, a 1.75-kg ball swings downward and strikes a 4.40-kg ball that is at rest, as the drawing shows. (a) Using the principle of conservation of mechanical energy, find the speed of the 1.75-kg

    asked by Bo
  89. science

    im stuck on this problem fill in the blank To solve the problem of a polluted stream a scientist traced where the pollution came from.She determines=d that the pollution was coming from many small sources.she worked on a plan to help reduce the pollution

    asked by matt
  90. AP Chemistry

    What is the entropy change for the vapor- ization of 2.2 mol H2O(ℓ) at 100◦C and 1 atm? H = 40700 J/mol.

    asked by Anonymous
  91. signals and systems

    Ts=0.18, H(s)=3/s+3 ,find hI[n],HI[e^jw},hs[n]

    asked by Andrew
  92. Math

    How do you solve this by substitution? x=6y+2 3x-18y=4 This is the answer I get: 3(6y+2)-18y=4 18y+6-18y=4 18y+1818y+6-18y+18y=4 36y=10 36 36 Y=5/18 3x-18(5/18) =4 3x-5+5= 4+5 3x= 9 3 3 X=3 (3, 5/18)

    asked by Please help
  93. math

    Solve by substitution: x-y=3 x+3y=6 This is what I get: X+3y=6 Y=x-3 X(x-3)=6 2x= 9 2 2 X= 9/2 9/2+3y=6 9/2-9/2+3y= 6-9/2 3y/3= 3/2/3 Y= ½

    asked by Please help
  94. math

    If f(x)=2x-1 and g(x)=x^2-x find : 1. g(g(x)) 2. g(f(x)) 3. f(g(x)) 4. f(f(x))

    asked by Pam
  95. statistics

    5. Suppose a manufacturer of computer chips is experiencing an average of 2% defective chips. (a) If a lot contains 1000 chips, what is the probability that more than 25 chips are defective? HINT. Use the normal approximation to the binomial.

    asked by Marisol
  96. physics

    A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it

    asked by santoki
  97. Algebra

    Solve the system of equations y=-2(x^2-1) y=2(x^4-2x^2 +1)

    asked by Anonymous
  98. College Math

    show that the quadrilateral with vertices at the following points is a parallelogram and find its area. a = (5,2,0), b = (2,6,1), c = (2,4,7), d = (5,0,6)

    asked by Muja
  99. Algebra

    How to solve y = -0.04x^2 + 1.3x + 56 using the quadratic formula?

    asked by Anonymous
  100. Acne

    Where is my post? Did someone remove it? :( :(

    asked by Anonymous
  101. Calculus

    Find the slope of the tangent line to the ellipse x^2/4 + y^2/16= 1 at the point (x,y)

    asked by Rowhan
  102. maths

    A plane takes off from a nearby airfield and climbs at an angle of 25° to the horizontal, at 220km/h along its flight path for 45 minutes. how far does it go

    asked by kido
  103. physics

    From t = 0 to t = 3 min 25 seconds, a man stands still, and from t = 3 min 25 seconds to t = 7 mins 35 s, he walks briskly in a straight line at a constant speed of 1.65 m/s. What is the magnitude of his average velocity vavg over this entire time

    asked by Gino
  104. calculus

    Suppose that a particle moves along a line so that its velocity v at time t is given by this piecewise function: v(t)=5t if 0≤t

    asked by Lane
  105. economics

    Consider the problem of a rational consumer with an experienced utility function given by 8√x+m. Let p=$1 p/unit denote the market price of good x. Suppose that, initially, the firm selling the good matches his purchases as follows: for every x units

    asked by malik
  106. economics

    Consider a market in which consumption of the good being traded generates a positive externality. There are 100 identical consumers, each with a utility function given by 1/2 √q+m+√G, where G denotes the total level of consumption in the market. The

    asked by hamna
  107. Chemistry

    What is the total heat evolved when a saturated solution of boric acid (H3BO3) in water is cooled from 100C to 20C? Note the specific heat capacity of the saturated solution is approximately that of water in that temperature range (4.20 J/g.K) and the

    asked by Marlee
  108. World Geography

    Founded in 1967, ASEAN did little to foster economic cooperation until proposed a free-trade area in 1991

    asked by Faith
  109. trig

    Suppose that Magnus' blood pressure can be modeled by the following function {{{p(t)=83-18sin(71pi*t)}}} Magnus' blood pressure increases each time his heart beats, and it decreases as his heart rests in between beats. In this equation, p(t)is the blood

    asked by joey
  110. physics

    consider a toy car that you pullback to make it go forward. Is it a force multiplier or a distance multiplier? Defend your answer with the observations you could make

    asked by rach
  111. Gr 10 math - finding slopes in shapes

    Is the slope 3/4 the same as -3/-4? In other words, do the negatives cancel each other out and become a positive number? Thanks!

    asked by iza
  112. physics

    What are the principles behind seatbelts and air bags that make passengers safer in a collision?

    asked by ana
  113. math

    Justin takes three times as long to do a job as Carl does, suppose t represents the time it takes Carl to do the job. Then 3t represents the time it takes Justin. How long does it take Justin if Carl takes (a) 30 sec? (b) 90 sec? (c) 2 min?

    asked by jeedo
  114. physics

    explain the input energy and out put energies of two kitchen machines

    asked by AMY
  115. physics

    if you throw a 0.2 kg ball strait up at 8 m/s how high will it go

    asked by AMY
  116. physics

    Hydraulic engineers in the United States often use, as a units of volume of water, the acre-foot, defined as the volume of water that will cover 1 acre (where 1 acre = 43560 ft2) of land to a depth of 1 ft. A severe thunderstorm dumped 2.6 in. of rain in

    asked by Joshep
  117. Exposition: How-to Essay (Writeacher)

    I have been assigned to write a 3-paragraph how-to essay. Should I number each paragraph? If not, why?

    asked by Anonymous
  118. physics

    train car are coupled together by being bumped into one another. suppose two loaded train cars are moving toward one another, the first having a mass of 150000 kg and velocity of 0.30 m/sand the second havin a mass of 110000 kg and a velocity of (-0.12

    asked by Mohanad
  119. Math

    Does -7x^2+6x+3 have two real-number solutions?

    asked by Anonymous
  120. Maths

    A population of 3.5 million bacteria increases by 48800 How many bacteria are there now?

    asked by Sarah
  121. Basic Spanish

    My grandson need tutoring in basic Spanish to improve translate from Spanish to English in writing assignments, &grammar . Do you have review , similar to Khanacademy ? He needs tutoring to improve basic Spanish , has no tutoring in his school. Thank you

    asked by Michael
  122. physics

    A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it

    asked by santoki
  123. statistics

    (12) Suppose N – 60,000, n =15,000, and s =50 (a) compute the standard error of mean (x) using the finite population correction factor (b) Repeat part a assuming n =30,000 (c)Repeat part a assuming n = 60,000 (d)Compare parts (a), (b), and (c), and

    asked by Carol Harper
  124. Math

    the directions for lemonade say to put 2 cups of liquid concentrate into one gallon of water. if olivia only wants to make one pint of lemonade, how many fluid ounces of concentrate should she put?

    asked by Jess
  125. Statistics

    A random sample of 90 observations produced a mean that = 25.9 and a standard deviation s =2.4 (a)Find a 95% confidence interval for u (b)Find a 90% confidence interval for u (c)Find a 99% confidence interval for u (Use integers or decimals for any number

    asked by Carol Harper
  126. social studies

    "terracotta was a significant part of bengal ancient time"-explaion

    asked by reya
  127. math

    how far from an 84 foot burning building should the base of the fire truck ladder be placed to reach the top of the building at an angle of 60 degrees with the ground. the ladder is mounted to the truck 8 ft off the ground

    asked by Anonymous
  128. math

    Please help me solve by elimination . 5x=20+y 16=3y+4x

    asked by Please help
  129. chemistry

    A piece of magnesium weighing 48 grams is burned in air n 80 gram of magnesium oxide is formed. what mass of oxygen combined with the magnesium is in the reaction?

    asked by Rodney
  130. science

    Copper carbonate decomposes though heat to form copper oxide and carbon dioxide. Write the equation both in words and chemical symbols.

    asked by Rodney
  131. math

    Solve by elimination 5x+y=2 3x+y=1 This is what I got : 3(5x+y=2) -5(3x+y=1) 15x+3y=6 -15x-5y=-5 -2y=1 2 2 Y=1/2 15x+3(1/2)=6 15x+3/2 =6 15x/15= 9/2 /15 X=3/10

    asked by Please help
  132. math

    If a new home can be constructed for $160,000, what is the opportunity cost of federal defense spending, measured in terms of private housing? (Assume a defense budget of $700 billion.)

    asked by jon
  133. reading

    Atticus influencing Scout can my subtopic be strict, respect for all people, and actions

    asked by Reina B.
  134. math

    x^2 sqrt(x)

    asked by Poulson
  135. PreCalc PLEASE HELP

    Find the common ratio, r, for the geometric sequence that has a1= 100 and a8= 25/32

    asked by Aly
  136. physics

    a bus starts from rest and achieves a velocity of 20m/s in 10s while moving westwards.calculate its avarage acceleration

    asked by Anonymous
  137. Chemistry

    What factors control the bond length in a covalent bond

    asked by Anonymous
  138. algebra

    Let g(x) be reflection of f(x)=3x+2 in the x - axis. What is a function rule for g (x)?

    asked by snow
  139. physics

    A bicyclist wants to make it from one building to the next. The first building he is standing on is 20 m tall. The building he wants to reach is 12 m tall. He is moving at 4 m/s and the gap between both buildings is 5 m. Will he make it? Please just show

    asked by help please!!!
  140. physics

    Two charged bodies exert a force of 0.225 N on each other. If they are moved so that they are one-third as far apart, what force is exerted?

    asked by Donna
  141. Plays

    If a character mentions a person who is not a character in the play, is that name capitalized? For example: JOHN. I have to give the apples to Jennifer. Should Jennifer be capitalized even if she is not in the play?

    asked by Anonymous
  142. PreCal

    Solve The Inequality 0 < -9x/x-x^2

    asked by Maria
  143. math

    3x-y=-2 3x-y=4 Please help me solve

    asked by Please help