Questions Asked on
October 12, 2008

  1. I need someone to check this

    Add and Simplify: 100x/x+10 + x^3/x+10 I have the answer as X^3+100x/X+10 is this correct?

    asked by Jennifer
  2. Chemistry

    A 2.00 ml sample of an aqueous solution of hydrogen peroxide, H2O2 (aq) is treated with an excess of Kl (aq). The liberated I2 requires 12.40 mL of 0.1025 M Na2S2O3, for its titration. Is the H2O2 up to the full strength (3% H2O2 by mass) as an antiseptic

    asked by Saira
  3. Math

    Solve: (t+24)/(t^2-t-56)+7/t-8=3/t+7

    asked by Shawn
  4. Math another problem

    Solve 1/C=1/C1+1/C2 for C1.

    asked by Shawn
  5. com220

    out of the questions below Elaborate on the authorship of one of the sources that you consider reliable. 1.what is the purpose and affiliation of the organization or author related to the article? 2.what are the author's credentials? 3.is the information

    asked by lisa
  6. physics!!**

    In a typical golf swing, the club is in contact with the ball for about 0.0015 s. If the 45 g ball acquires a speed of 75 m/s, estimate the magnitude of the force exerted by the club on the ball.

    asked by kelsey
  7. social studies

    where will i find invention of vehicle in internet?

    asked by Dhicks
  8. physics 2!!**

    Two ice skaters stand at rest in the center of an ice rink. When they push off against one another the 45 kg skater acquires a speed of 0.71 m/s. If the speed of the other skater is 0.84 m/s, what is this skater's mass?

    asked by kelsey
  9. physics 3!!**

    In a football game, a tackle running at a constant speed of 5 m/s tackles a stationary receiver. The two fly off horizontally at 4 m/s, before they hit the ground and begin to slow down. If the mass of the tackle is 120 kg, a.) What is the mass of the

    asked by kelsey
  10. Chemistry

    Need Help with these two problems 1.One piece of copper jewelry at 111°C has exactly twice the mass of another piece, which is at 36.0°C. Both pieces are placed inside a calorimeter whose heat capacity is negligible. What is the final temperature inside

    asked by Jamie
  11. physiology

    the blood-brain barrier prevents hydrophobic molecules from diffusing into the brain. T or F Excitable cells are incapable of maintaining a constant resting membrane potential. T or F The membrane of resting nerve cells is more permeable to______ions than

    asked by anna
  12. physiology

    what percent of blood flow to the body per minute goes to the brain ? 10, 20, 25, or 30% ?

    asked by anna
  13. science

    In 1960 physicist Theodore Maiman constructed the first working laser.This design was improved upon Bell Telephone Laboratories in 1961.Since then lasers has been found to have a wide variety of applications.Identify one application of laser technology and

    asked by lizzy
  14. health and social

    helppp .. what does health and social acttually meann ??

    asked by Dannie
  15. physics

    A coaxial cable has an inside conductor of radius 'a' carrying a current 'I'.The current returns as a uniform current through the outside conductor with a inside radius 'b' and outside radius 'c'.What is the magnetic field at a distance 'r' from the

    asked by Sandhya
  16. physics

    A coaxial cable has an inside conductor of radius 'a' carrying a current 'I'.The current returns as a uniform current through the outside conductor with a inside radius 'b' and outside radius 'c'.What is the magnetic field at a distance 'r' from the

    asked by Sandhya
  17. Physics

    The magnetic field inside a solenoid is 8.617 mT. If this solenoid sits with its central axis perpendicular to a 30 mT magnetic field, what is the magnitude of the torque on the solenoid

    asked by Sandhya
  18. Math

    Rearrange for J; n=(2J+1)exp(-(BJ(J+1))/(KT)) where T, B and K are constants

    asked by Beth
  19. 5th grade math

    what mode median and mean?

    asked by fithgrader
  20. 6th grade

    need to find what component of 77 is

    asked by btd
  21. physics

    What is the force on an electron moving at v = 2.5*10^5 m/s away from a long wire,3mm from the electron, carrying a 12 A current? Give the magnitude & direction of the force. I calculated mag induction using B = u0I/2(pi)*a and force on the electron using

    asked by Sandhya
  22. 220

    Do you believe that writing your outline helped you when you wrote your final draft?

    asked by meshelle
  23. Math

    for my math project I have to know how much mass is in a superball. . . . THANKS!

    asked by Taylor
  24. Science

    Is this correct? work= .01 x mass x distance mass measured in grams distance measured in meters Is this right??

    asked by Alli
  25. Chemistry

    A. The forensic technician at a crime scene has just prepared a luminol stock solution by adding 13.0 g of luminol into a total volume of 75.0 mL of H2O. -What is the molarity of the stock solution of luminol? B. Before investigating the scene, the

    asked by Irvin
  26. physics

    A man of mass 64.5 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 24.3 kg and is 3.6 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the

    asked by Sara
  27. physics

    The 17.9 cm diameter disk rotates on an axle through its center. F1=22.1 N, F2=32.4 N, F3=32.4 N, F4=22.1 N, and d=4.74 cm. What is the net torque about the axle?

    asked by Sara
  28. com220

    because the author of the page backed his informatin up with citations. The question is:What if the supporting citations are not authentic?

    asked by lisa
  29. Economic

    After 18 months, if a GDP only increased by 3/4 of the expected amount; what factors might be responsible for this.

    asked by Jan C
  30. physics

    An athlete at the gym holds a 4.33 kg steel ball in his hand. His arm is 68.7 cm long and has a mass of 4.69 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor? Torque = massball x

    asked by Sara
  31. com220

    while it is true that just about anyone can engage in blogging. Can a blog ever be considered trustworthy based on the credibility of the author?

    asked by lisa
  32. physics

    An athlete at the gym holds a 4.33 kg steel ball in his hand. His arm is 75.0 cm long and has a mass of 5.28 kg. What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor? Responses Physics -

    asked by Sara
  33. Solve

    Solve 1/C=1/C1 + 1/C2 for C1 This multiple choice and the listed answers are: a.)C1= CC2/(C2-C) b.)C1= C-C2/C c.)C1= C+C2/CC2 d.)C1= C+C2/C2

    asked by Shawn
  34. Comments please? what is your opinion? History

    Alana: ....Do you believe that powerful factions today, have destroyed, or have the potential to destroy the republic that the Founding Fathers have created, or do you think that factions help the assist the formation of a more developed nation? I agree

    asked by Giznelbell
  35. chemistry

    last check: (c) A wine cooler contains 4.5% ethanol by mass. Assuming that only the alcohol burns in oxygen, how many grams of wine cooler need to be burned to produce 3.12 L of CO2 (d = 1.80 g/L at 25°C, 1 atm pressure) at the conditions given the

    asked by starlight
  36. CE: re ART

    Finally heard from my son; he wanted to check the answer to your ART question "The first american painting to reach the million mark was "Three Flags" by Jasper Johns. It was purchased by the Whitney under the director Tom Armstrong (worked with him). It

    asked by GuruBlue
  37. sequnces

    my teacher said to find out about a sequce and find the man it is named after . it is 1,1,2,3,5,8,13,21........ and i have got to find out the rest

    asked by abigail
  38. Calculus

    Find the interval(s) where the function is increasing and the interval(s) where it is decreasing. f(x) = 3x + 5 ok...i think you find the derivative first...? but i thought u had to find the critical points somehow... i am so lost! can someone show me how

    asked by Mel <3
  39. a problem

    Solve: (t+24)/(t^2-t-56)+7/(t-8)=3/(t+7) I do know that (t^2-t-56) can be factored out to (t-8)(t+7) so I have the equation as (t+24/(t-8)(t+7) +7(t+7)/(t-8)(t+7)-3(x-8)/(t-8)(t+7) is this correct ot what am I doing wrong?

    asked by Shawn
  40. Help

    Erik bicycles 32 km/h with no wind. Against the wind he bikes 33 km in the same time it takes to bike 63 km with the wind. What is the speed of the wind?

    asked by Erica
  41. Formula help

    Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). How do I solve this problem?

    asked by David
  42. math

    Divide. 23.92 ÷ 4

    asked by terry
  43. Math

    Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). How do I solve this problem? I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I am lost after that This is a multiple choice question and I am not getting any of

    asked by David
  44. Math assistance needed

    Solve: (t+24)/(t^2-t-56)+7/(t-8)=3/(t+7) I do know that (t^2-t-56) can be factored out to (t-8)(t+7) so I have the equation as (t+24/(t-8)(t+7) +7(t+7)/(t-8)(t+7)-3(x-8)/(t-8)(t+7) is this correct ot what am I doing wrong? I don't understand the rest so

    asked by Shawn
  45. english

    write a sentence beginning with three if clauses

    asked by Anonymous
  46. Math word problem

    Erik bicycles 32 km/h with no wind. Against the wind he bikes 33 km in the same time it takes to bike 63 km with the wind. What is the speed of the wind? I don't understand any of the responses. You have to assume in this case the wind retards and assists

    asked by Erica
  47. Pre-Calculus

    Find the equation of the hyperbola whose vertices are at (-1,-5) and (-1,1) with a focus at (-1,-7). So far I have the center at (-1,-2) and part of the equation is (y+2)^2 - (x+1)^2 but do not know how to figure a^2, b^2, or c^2. Help please....

    asked by Lucy
  48. english

    Complete the sentence below by interrupting it with two parallel if clauses: The problem of race relations, if………., and if………. must be solved.

    asked by Anonymous
  49. Math

    m=y^2-y^1/x^2-x^1 solve for i1

    asked by nadine
  50. math check

    I have a problem that I need checked it is the produce of the reciprocals of two consecutive integes is 1/182 Find the integers. I have as the answer -13,-14 or 13,14 is this correct?

    asked by Shawn
  51. MGT

    theses are the 8 steps... 1. Be alert to indications and symptoms of problems. 2. Tentatively define the problem. 3. Collect facts and redefine the problem if necessary. 4. Identify possible alternatives. 5. Gather and organize facts concerning identified

    asked by dawn
  52. Math check 2

    Solve: (t+24)/(t^2-t-56)+7/(t-8)=3/(t+7) I do know that (t^2-t-56) can be factored out to (t-8)(t+7) so I have the equation as (t+24/(t-8)(t+7) +7(t+7)/(t-8)(t+7)-3(x-8)/(t-8)(t+7) (t-24) + 7(t+7)=3(t-8) solve for t. The choices are: a.)-97/5 b.)122/5

    asked by Shawn
  53. 12th grade Physics

    A boy pushes a lawn mower with a mas of 17.9 kg starting from rest across a horizontal lawn by applying a force of 32.9N straight along the handle, which is inclined at an agle of 35.1 degrees above the horizontal. The magnitude of the mower's

    asked by HR
  54. plz help english

    my question is:- Complete the sentence below by interrupting it with two parallel if clauses: The problem of race relations, if………., and if………. must be solved. question is i wrote:- the problem of race relation, if it goes on increasing, and if

    asked by Anonymous
  55. Lit

    Invisible Man: Mr. Norton- "you are my fate, young man" he talks about emerson's self realiance and how emerson is important but isnt he going aganist emerson's theory of self reliance??

    asked by Eli
  56. accounting

    how do i prepare year-end adjusting entries?

    asked by idk
  57. English comp 1

    I am writing about teen suicide but I am finding it difficult to write a claim statement. Can you helP?

    asked by Debi
  58. Social Studies

    Peidmont region what are two important industries/what way do people use the forest for in the piedmont region

    asked by Leroy Hemingway
  59. BIOLOGY

    What is one practical biotechnological use of plasmids?

    asked by Anonymous
  60. Math problem still stuck

    Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I have multiplied the LCD of (a-8)(a+7)(a+22)by both sides with no luck. This is a multiple choice question a.)

    asked by Shawn
  61. math

    need to linearize r=u(1-exp(s/k))*c where some combination of r, s, and c is the independent variable, s or c is the dependent variable, and u and k must be involved in the parameters of the linearization

    asked by Ryan
  62. Word problem check

    one summer, Van mowed 4 lawns for every 7 lawns mowed by Fiona. Together they mowed 132 lawns. How many did Fiona mow? I have the answer as 84 is that correct?

    asked by Shawn
  63. Math problem check

    Simplify: (2/a + 6/b) / (8/ab + 4/a^2) I have the answer as a(3a+b)/(4a+2b) Is that correct?

    asked by Shawn
  64. Math problem check

    Subtract and Simplify: 4a^2/(a-b)-(4b^2-8ab)/(b-a) I have the answer as 4(a+b)^2/(a-b) or should it be 4(a-b)^2/(a-b)

    asked by Shawn
  65. Math Analysis

    Find two rational expressions that have a sum of 9-9x/x^2-9 I need steps not just answers

    asked by Mary
  66. English

    A question on "The Lottery" by Shirley Jackson ? I am writing an essay explaining how the use of literary devices creates a sense of horror. I wrote down things like "withheld knowledge" (that the author not telling readers the "prize" of the lottery) but

    asked by Andrew
  67. english

    can someone help me write a narrative essay using the pronoun I with 3 to 10 pages and 750 to 2500 words

    asked by jackie
  68. Civics

    What does a political party do after it wins the election in order to govern?

    asked by Sara
  69. chemistry

    A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 1.55 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?

    asked by Lili
  70. math check question

    Subtract and Simplify: 4a^2/(a-b)-(4b^2-8ab)/(b-a) I have the answer as 4(a+b)^2/(a-b) or should it be 4(a-b)^2/(a-b) Responses Math problem check - bobpursley, Sunday, October 12, 2008 at 4:23pm just the numerator.. 4a^2-8ab + 4b^2, right? 4(a-b)^2 Now

    asked by Shawn
  71. Math check 3

    f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I have multiplied the LCD of (a-8)(a+7)(a+22)by both sides with no luck. This is a multiple choice question a.)

    asked by Shawn
  72. chemistry

    In the experiment, a hydrate is heated to form an anhydrate. The masses of the before and after are measured and the percent of the water in the hydrate is calculated. If some of the hydrate spatters out of the crucible and isnt noticed, how will this

    asked by sylvia
  73. Math problem

    Solve: 5/(x-8)-5/x = 40/(x^2-8x) How would this be solved?

    asked by Eric
  74. Pre-Calculus

    Find the equation of the ellipse whose semi-major axis has length 6 and whose foci are at (3,-2+/-sqrt11). I have the focal constant = 2a which means that a=3 but don't know how to proceed. Thanks.

    asked by Lucy
  75. math

    indo european number system

    asked by allison
  76. Math check

    subtract and simplify: 4a^2/(a-b)- (4b^2-8ab)/(b-a) I have the answe as 4(a-b) is this correct?

    asked by shawn
  77. Math

    Simplify: (X^2+X-2)/(X^2-9)/(X^2-6X-16)/(X^2-6X+9) I have the answer as (X-3)(X-1)/(X-8)(X+3) is this right?

    asked by shawn
  78. chemistry

    A weather balloon is inflated to a volume of 27.0 at a pressure of 730 and a temperature of 31.3. The balloon rises in the atmosphere to an altitude, where the pressure is 365 and the temperature is -14.6. use as a ideal gas behavior

    asked by Lili
  79. chemistry

    A weather balloon is inflated to a volume of 27.0 at a pressure of 730 and a temperature of 31.3. The balloon rises in the atmosphere to an altitude, where the pressure is 365 and the temperature is -14.6. Assuming the balloon can freely expand, calculate

    asked by Lili
  80. math

    how do i figure out this problem. the average human blink their eyes 6,205,000 times each tear. if a person is awake for 16 hours a day, how many times will she blink a day? a hour, a minute?

    asked by debi
  81. history??

    i would like to know what's the different between the two questions i know that the answer for the first question is plymouth but is the second question is it asking the same answer or what i am confused >????? The permanent settlement in new England was

    asked by KA
  82. Algebra

    The perimeter of a rectangle is 90 meters. The length is 9 meters more than twice the width. Find the dimensions. I need the length and the width. Thanks!

    asked by Kay
  83. Math check

    Find the y-intercepts for the function given by: f(x)= 4/(x+5)-1/(x-4)/2/(x-3)+3/(x+2) I am stuck

    asked by shawn
  84. Algebra

    two angles are complimentary. The sum of the measure of the first angle and half the second angle is 75 degrees. Find the measure of the angles. What is the measure of the smaller angle? what is the measure of the other angle?

    asked by Kelly
  85. novel help

    Hello, I need to write a short review on the novel Girl Interrupted while I have read the book twice I can't find how the disorder that Susanna Kaysen has affected her family members, does it say in the book, also I need to put what treatment she received

    asked by chris
  86. Math check 3

    Simplify: 9/(y+8)-y/(y-2)+(y^2+4)/(y^2+6y-16) IS the answer y-14/(y-2)(y+8)?

    asked by shawn
  87. Chemistryy....PLEASE HELPP HAVE MIDTERMMM

    A 2.00 ml sample of an aqueous solution of hydrogen peroxide, H2O2 (aq) is treated with an excess of Kl (aq). The liberated I2 requires 12.40 mL of 0.1025 M Na2S2O3, for its titration. Is the H2O2 up to the full strength (3% H2O2 by mass) as an antiseptic

    asked by Sara
  88. physical science

    what must be add or removed in order for matter to change state?

    asked by carly
  89. Math

    Solve: 3/(9x-6)=5/(7x+1) I have the answer of 11/8 it is probably wrong.

    asked by shawn
  90. Algebra

    Snooker's lumber can convert logs into either lumber or plywood. In a given day, the mill turns out twice as many units of plywood as lumber. It makes a profit of $30 on a unit of lumber and $45 on a unit of plywood. How many of each unit must be produced

    asked by Sharon
  91. Chemistry I

    An unknown volume of water at 18.2 degrees celsius is added to 24.4 mL of water at 35.0 degrees celsius. If the final temperature is 23.5 degrees celsius what was the unknown volume? (assume no heat is lost to surroundings and D of water is 1.00g/mL)

    asked by Kelsie
  92. math

    the difference between two numbers is 235. If the larger number is 876 what is the small number

    asked by Tasia
  93. Algebra

    I am supposed to find the ticket sales of a concert using this formula: N(x)= -0.3x^2 + 6x + 15 X represtents the number of days since the concert was first announced. I need to find out when daily ticket sales will peak and how many tickets will be sold

    asked by Laura
  94. math

    (8-6)*5-28

    asked by Tasia
  95. Math check 4

    Find the y-intercepts for the function given by: f(x)= 4/(x+5)-1/(x-4)/2/(x-3)+3/(x+2) Math check - Damon, Sunday, October 12, 2008 at 5:56pm The y axis intercepts are the values of the function when x = 0 4/5 - [(1/-4)] / [(2/-3)] + 3/2 Math check -

    asked by shawn
  96. Math

    140/297 write fraction in simpest form

    asked by Claire
  97. writing

    I'm trying to write a company bio. I just want to know what you think and see if it needs improvement. 1. Who are you (literally) 2. What do you do? What is your area of expertise? 3. Who does this help? What needs do you fulfill for others? 1. Who are

    asked by Anonymous
  98. math question.

    any additional data that would be useful or necessary to solve this problem using your strategy(f) If you answered yes to the question in step (e), what are some possible sources for this data? (g) For assistance in testing your hypothesis, do you feel

    asked by sherri
  99. physiology

    neurotransmitter release would be inhibited by a.stimulating repolarization of the axon terminal b.blocking Ca2+ influx in the axon terminal c.blocking repolarization of the axon terminal d.stimulating protein kinase activity I think its b, but not sure

    asked by anna
  100. Algebra 1

    so im not that good with word problems so... here it goes. Nadine has 7 more nickles than Delano has dimes. If Delano gives Nadine 4 of his dimes, then Delano will have the same amountof money as Nadine. How much money do they have together, assuming

    asked by Bridget
  101. math

    please help me figure out how to do thes problems 4. y/2+5=-12 6. x/3-9=0 7. 14+h/5=2 THIS IS IMPROTANT Y/2, X/3 AND H/5 ARE FRACTIONS. it doesnt mean divide its fractions that's why i need help plse tell me how you did it so i can figure out the rest of

    asked by Amy
  102. Chem

    high purtity benzoic acid (C6H5COOH; ^Hrxn for combustion is -3227kJ/mol) is used as a standard for calibrating bomb calorimeters. A 1.221g sample burns in a calorimeter(heat capacity=1365J/C) that contains exactly 1.270kg of H2O. What temperature change

    asked by Kelsie
  103. chemistry

    When a 28.8mL of .500M H2SO4 is added to 28.8mL of 1.00M KOH in a coffee-cup calorimeter at 23.50 degrees Celsius, the temperature rises to 30.17 degrees Celsius. Calculate the ^H(change in enthalpy)of this reaction. (assume total volume is the sum of

    asked by Kelsie
  104. HISTORY HELP

    I'm reading my book and from what i'm getting here is that the progressives demanded a more activist government but what im not understanding is how they justified their demands.

    asked by Samuel
  105. college

    why did the Versailles treaty failed to be ratified? I understand it was due in part to the senate, but what I don't understand is why the senate failed to ratify it.

    asked by Mike
  106. Math

    3. You recently started the paperwork to purchase your new home, and you were just notified that you can move into the house in 2 weeks. You decide to hire a moving company, but are unsure which company to choose. You search online and are interested in

    asked by Jessica
  107. Statistics

    PLEASE CHECK AND SEE IF I HAVE THESE ANSWERS CORRECT. T F 1. Hypothesis testing is a procedure based on sample evidence and probability theory to decide whether the hypothesis is a reasonable statement. ANSWER (True) T F 2. For a one-tailed test using the

    asked by Susan
  108. introduction to healthcare

    What role do health care workers play in determining quality care?

    asked by Norma
  109. Pre-Calculus

    Find the coordinates of the center, the foci, the vertices, and the equations of the asymptotes of the graph of the equation: (x+1)^2/2-y^2/8=1. Center: (-1,0) foci:(-1+/-sqrt1, 0) vertices: (-1+/-sqrt2, 0) equations of the asymptotes: y-0=sqrt8/sqrt2(x+1)

    asked by Lucy
  110. macroeconomics 205

    Last month, you sold an old car to your neighbor for 5000 dollars. The neighbor repainted the car at a paint shop for 500 dollars, of which only 400 was paid in cash and the rest in credit. By how much (if any) GDP in 2006 is affected?

    asked by Alex
  111. Pollution

    what is the difference between pollutants and impurities? Is there even a difference?

    asked by Lisa
  112. BEHAVIORAL SCIENCE

    Think about the last time you attended a lecture or were in a classroom. Applying the information processing model, why did some things make it into your short-term memory and some things into your long-term memory? How can knowing this process increase

    asked by laura
  113. latin

    When I am translating Latin sentances, where should I start. Should I identify what all the words mean or should I find the subject of the sentence or maybe the main verb.

    asked by Ryan
  114. Math

    How would you go about solving this problem? A 2000 L tank containing 550 L of water is being filled with water at the rate of 75 L per minute from a full 1600 L tank. How long will it be before the two tanks have the same amount of water?

    asked by Megan
  115. Social Studies

    can someone please help me?? im so confused with this. :( Columbus's journey to the Americas in the 15th century led to many changes in the new world. a. Identify the resulting convergence of cultures and items that were introduced to the old and new

    asked by SARAH
  116. science

    he served a four year apprentship to a blacksmith

    asked by tyuo
  117. 8th grade

    the 13 colonies were broken down to

    asked by Anonymous
  118. SOCIAL STUDIES

    i don't understand this at all. can you help? what are three goals of conquistadors?

    asked by SALLY
  119. French Geography Project

    I need to know a popular activity and a Cuisine in Mauricie, Canada and I have been looking for a long time but can't find either one of them. Do you know where I can find them? Thanks

    asked by Micheal
  120. Pre-Calculus-check answer

    Solve: x^2+y^2=10 and xy=3 Answer: (+/-3, +/-1) or (+/-1, +/-3)

    asked by Lucy
  121. Business

    A. Joe won a lottery jackpot that will pay him $12,000 each year for the next ten years. If the market interest rates are currently 12%, how much does the lottery have to invest today to pay out this prize to Joe over the next ten years? B. Mary just

    asked by Julie
  122. Chemistry

    How do you find molar mass?

    asked by Marie
  123. physics

    The mass of each of the two blocks is 1.50 kg, and the insulated tank is filled with 220 g of water. What is the increase in the temperature of the water after the blocks fall through a distance of 2.50 m? I am trying to use the eq Q=MCTriangleT however i

    asked by RITA
  124. AP Statistics

    A certain density curve looks like an interverted letter V. The first segment goes fro the point (0,0.6) to the point (0.5,1.4). The segment goes from (0.5.1.44) to (1,0.6). (a) Sketch the curve. Verify that the area under the curve is 1, so that it is a

    asked by Geroge
  125. language arts

    What is the difference between constructivist classroom and traditional classroom?

    asked by sally
  126. Chemistry

    After 0.6523 g of CoCl2*6H2O is heated, the residue has a mass of 0.3423 g. Calculate the % H20 in the hydrate. What is the formula of the hydrate? -I understand how to get the % H2O in the experiment but how do you determine the formula?

    asked by Deana
  127. 12th grade Math?

    How would you factor 3x^3-4x^2+4x-1? P.S. Factor theorem does not work here.

    asked by BioBabe