1. Algebra

    I am trying to solve the sytems of equations using the elimination method. 2x+4y=10 -3x+3y=-6 I tied multiplying the first equation by 2 and the second by 4. Then I tried multiplying the first equation by -3 and the secondy by 3. The book says the answers

    asked by G on March 28, 2008
  2. Chemistry

    Can some please check my answers for the following questions? THANK YOU. 1)The chemical formula for aspirin is C9H8O4. What is the mass of 0.40 mol of aspirin? ANSWER: 45 g 2)The gram molecular mass of oxygen is. ANSWER: 16.0 g 3)What is the mass, in

    asked by anonymous on August 1, 2007
  3. Trigonometry

    a satellite camera takes a rectangular-shaped picture. the smallest region that can be photographed is a 4km by 6km rectangle. as the camera zooms out, the length 1 and the width w of the rectangle increase at a rate of 3km/second. how long does it take

    asked by YAZ on September 30, 2012
  4. Trigonometry

    a satellite camera takes a rectangular-shaped picture. the smallest region that can be photographed is a 4km by 6km rectangle. as the camera zooms out, the length 1 and the width w of the rectangle increase at a rate of 3km/second. how long does it take

    asked by YAZ on September 30, 2012
  5. Math

    When I did the following problem, I got -12 as my answer. It is an evaluation problem, It looks like this: Evaluate: -2^0[-2^0-2^2-(-2)^3-2](-2^0-2)+x-xy When x= -3 and y= -4 I am unsure if this seems to be correct. If I made a mistake can someone please

    asked by Crystal on February 14, 2010
  6. pre algebra

    I have a problem and I would like to know how to work out the problem to get the answer. Write an algebraic expression for each phrase product of m and n -2 What are the steps in working this out?

    asked by Theodore on October 27, 2009
  7. Math

    I am doing a scavenger hunt assigned by my sixth grade teacher and the beginning problem is 7

    asked by Racheal on January 3, 2008
  8. Basic Math

    I need help adding fractions with different denominators. Here is the problem... 1 - 1/2 + 1/3 - 1/4 + 1/5 - 1/6 I can see that the demoninators increase. Since they are both addition and subtraction, how do I do this problem? Thanks, Walter, New York.

    asked by Walter on February 14, 2011
  9. Math

    I need help with this problem: Write an equation that will give the slope of f(x) at every point: f(x)= -4x^2-17x+5.6. It seems basic but I am having trouble understanding what the problem is asking for.

    asked by Amy on January 25, 2009
  10. 8th grade algebra

    need ideas of personal experiences to create a mathematical story problem using 4 pictures of this experience and solve the problem.

    asked by Raylen on May 5, 2010
  11. 8th grade algebra

    need ideas of personal experiences to create a mathematical story problem using 4 pictures of this experience and solve the problem.

    asked by Raylen on May 5, 2010
  12. Algebra 2

    Please help me solve and find the excluded values for this problem. Also please show me the work for this problem I want to learn!@!@!. 49X^6+7X^7/28X^8

    asked by Omar on March 28, 2014
  13. Environmental

    I have to write a paper on an environmental problem and expand on a (or two) solution to the problem... any ideas? Anything specific would be great since I'm at a stand still...

    asked by Jessy-Leigh on December 3, 2007
  14. Math

    Hello I am having trouble with a pre-calculus problem. The problem is ln|Sin2X-CosX-1|=0 if you could help by listing the steps to solve that would be great! Thanks!

    asked by Anonymous on December 2, 2013
  15. Animation

    1. Music is shown to almost never evoke powerful emotions True False (My answer **) 2. Who pioneered the use of sound techniques that were developed from those used in radio dramas and meant to simulate real sounds? A)Thomas Edison (*** My Answer***)

    asked by Ilovemusic on January 23, 2019
  16. english

    can you please tell me where did you find the answers to the questions:1)does hipaa affest the patient's access to his or her medical records? if so, ddescribe the eefct and the procedure for obtaining access.2)under what circumstances can personal health

    asked by fee on July 6, 2009
  17. science

    in the following problem, one of the metric SI punctuation rules were broken, state the problem: 67 km

    asked by Me on September 26, 2011
  18. Algebra 2

    Can you please help me simplify this problem? It probably is an easy problem but I do not understand the way my teacher taught it. 1/ [1+(1/ x-2)]

    asked by Aura on January 27, 2011
  19. algebra

    3x^2-5=16 solving equation I see no one is answer ansy problem could some please I need this problem tonight.

    asked by Keaton on May 27, 2010
  20. Precalculus

    A geometric series has t1 = 3 and r = 2. If tn = 96. What does n equal in this problem? What is the special name given to the terms between 3 and 96 in this problem?

    asked by Anon on January 20, 2012
  21. Math

    Write the subtraction problem as an equivalent addition problem. Explain. 46 - 15

    asked by Anonymous on October 4, 2009
  22. Math

    can you please check this problem for me, and if I happen to get it wrong. explain it? thank you =]]. -6x=54 this is the problem. -6x =54 +6 +6 x = 48 ?? is this right please respond. =]]

    asked by Taylor on January 7, 2008
  23. Math

    can you help me on this problem;; here is the problem, solve the equation. remember to gater like trems. FIRST!! k-5 / 6 = -7 ?

    asked by Taylor on January 8, 2008
  24. Math

    How will I work this problem? Find the functional values requested in the problem. h(x)=3x-4 (a) h(0) = (b) h(-10)=

    asked by Ms. Jackie on October 23, 2012
  25. Math

    The problem states that "5 to 8 is as 15 to w." I'm having some trouble solving this because I am unsure of what the problem is asking me to do. Some help would be appreciated. Thank you! :)

    asked by Melisande on January 13, 2014
  26. algebra

    I forgot to ask my teacher how to do this problem because I got it wrong..so i need someone to help me do this problem. I don't understand it! 3(2+3x)=22-5x

    asked by anonymous. on September 7, 2011
  27. Algebra

    Write a story problem that is associated with this proportion, then solve the problem. 15/16= n/100

    asked by Chey on March 13, 2018
  28. Gov

    what was the overall problem with the Articles of Con.? give 4 examples that illustrate the problem

    asked by Mike on September 17, 2011
  29. math

    Show how to make one addend the tens number. Problem: 22+49= 71 new problem.

    asked by Linda on November 14, 2014
  30. Math! Please help!

    This is an inequality problem/question. I dont know if I'm right in solving this problem: 15 ≤-k/4-9 (k/4 is a fraction) Please help! I got 5.25 ≤k

    asked by Amy on February 13, 2017
  31. psychology

    individuals who use problem-focused coping will deal with a problem or stressor by

    asked by felicia on September 17, 2012
  32. Windows Server 2003 HELP ASAP!!!

    Could please help me with some questions aswell as check the ones I've answered? Thanks! Which of the following media has the largest data storage capacity? a. Zip cartridge b. CD c. DVD (This is what I think the answer is) d. Jaz cartridge Why is hardware

    asked by I_Love_Music on September 30, 2006
  33. Help with Psychology Homework

    Your professor asks you to take a personality test. After taking the test, you read your description of your personality type, and are disappointed that the results do not seem to capture your personality at all. In fact, you think the test probably

    asked by Chris on March 24, 2015
  34. Physics/Math

    What is the sum of the following four vectors in unit-vector notation? For that sum, what are (b) the magnitude, (c) the angle in degrees, and (d) the angle in radians? E: 6.36 m at +0.90 rad F: 4.52 m at -75 ° G: 3.31 m at +1.20 rad H: 5.4 m at -210 °

    asked by TechnoBoi11 on January 27, 2007
  35. math

    12.(4pts) Solve the problem. Round your answer to the nearest tenth of a percent unless otherwise indicated. Sales of frozen pizza for a club fund-raiser increased from 500 one year to 575 the next year. What was the percent of increase? Solve the problem.

    asked by anonymous on March 7, 2011
  36. Physics

    You stand on a bathroom scale that rests on the floor of an elevator. Standing on the scale compresses internal springs and activates a dial that indicates your weight in newtons. When the elevator is at rest, the scale reads 600 N. Then the elevator

    asked by Bob on May 1, 2012
  37. Pre-Calc

    This is the last question on my pre-calc homework, I looked through the textbook and have no idea how to do this. Use the Law of Sines to solve for all possible triangles that satisfy the given conditions. (If an answer does not exist, enter DNE. Round

    asked by Cat Jones on March 5, 2015
  38. biology

    Why must plants have both mitochondrion and chloroplasts? Thanks in advance. I think it has something to do with the fact that chloroplasts convert sunlight into chemical energy. Does that sound right? One of the most widely recognized and important

    asked by April on January 13, 2007
  39. Algebra

    1) Is the equation: 28 - 4√2 = 24√2 True? Explain why or why not? 2) Is this statement √a + √b = √(a +b) True? Explain why or why not? 3) What is the index of a radical? When working with radicals, can the radicand be negative when the index is

    asked by Sue Bonds on August 6, 2011
  40. Math

    Which statement(s) is/are true?Select one of the options below as your answer:A. A 25° angle is congruent to a 25° angle.B. Two intersecting lines form two pairs of congruent angles.C. It is possible for congruent angles to add up to 90°.D. All of the

    asked by DD on July 24, 2013
  41. life science

    An organism's ability to maintain steady internal conditions despite changes in its external environment is called biogenesis homeostasis osmosis respiration In an organism, a virus enters, and reproduces within, a(n) host cell infection interferon

    asked by joe on May 12, 2010
  42. Finance

    You want to purchase a new condominium that costs $287,500. Your plan is to pay 25 percent down in cash and finance the balance over 15 years at 3.75 percent. What will be your monthly mortgage payment including principal and interest? $1,568.07 $1,333.33

    asked by Jen on February 5, 2017
  43. history

    Ok i am having trouble with my world history homework questions........Please HELPPPP!!!!!!!!!!!!!!!!!? Ok these are the three questions i am having trouble with: 1. What are some of te characteristics of the "Renaissance man" and "Renaissance woman"? 2.

    asked by chris on January 28, 2009
  44. US History

    'Take a poll of your classmates to find out what they trust about the federal government and what they mistrust about it. Compile the answers into a list. Then use the list to make a bar graph of the top five answers.' Since I don't have classmates (-.-) I

    asked by mysterychicken on November 10, 2010
  45. math

    Wondering the answers to these: Find the value of each of the following. Leave your answers as fractions where appropriate. [I did these myself but need to answer-check] a) log[base4](1/8) b) 10^(-10log3) c) 2log[base3](9) d) log[base3](3)^(2x) ans: a)

    asked by Daniel on April 7, 2013
  46. Physics

    Hello! I live in Mexico, and I have a couple of questions I asked on Y answers, both English and Spanish, and have gotten no reply, and I need to turn this in for my bimonthly exam in physics this Monday. I need to calculate the volume and surface area of

    asked by Gabby on September 30, 2012
  47. ss

    The british army was trapped at yorktown by? a.an army led by friedrich von stueben b.a freet of spanish warships c. a fleet of french warships d. guerella fighters led by francis marion. Isnt it C I want this paper to be correct in all the answers as much

    asked by kelly on April 23, 2007
  48. math

    So I don't have a question I just wanted to wish all of the Jiskha tutors a very Happy Thanksgiving! All of the Students that use this site really appreciate all of the help. Thanks you all for checking our questions, and explaining materials to us when we

    asked by swimmer girl on November 23, 2017
  49. trig help much appreciated! :))

    1. Find the complete exact solution of sin x = . 2. Solve cos 2x – 3sin x cos 2x = 0 for the principal value(s) to two decimal places. 3. Solve tan2 x + tan x – 1 = 0 for the principal value(s) to two decimal places. 4. Prove that tan2  – 1 + cos2 

    asked by suzy on August 16, 2013
  50. chemistry

    A sample of 1.15g of lead (II) nitrate is mixed with 121mL of 0.104 M sodium sulfate solution. Part A Write the chemical equation for the reaction that occurs.

    asked by Cas on September 23, 2014
  51. Science plz help

    Explain the basic parts of a major theme in molecular biology: the pathway of DNA to RNA to proteins. Include a general idea of what occurs at each stage

    asked by Sara on January 23, 2015
  52. Chemistry

    write a balanced nuclear equation for the reaction that occurs when uranium-335 absorbs a neutron and undergoes fission to produce 3 neutrons, bromine-65 and another nucleus.

    asked by Leila on January 24, 2017
  53. chem

    Consider the reaction that occurs on mixing 50.0 mL of 0.560 MNaHCO3 and 50.0 mL of 0.400 M NaOH at25oC. (a) Write a balanced net ionic equation for thereaction. (b) What is the pH of the resulting solution?

    asked by pal on March 29, 2011
  54. cheistry

    Write a net ionic equation for the overall reaction that occurs when aqueous solutions of hydrosulfuric acid and potassium hydroxide are combined. Assume excess base.

    asked by savannah on November 17, 2011
  55. English

    Can you please check if the following sentences are possible? Thanks in advance. 1)Sterne breaks the rule of the conventional biography since Tristram’s birth occurs only in the third episode. 2)Furthermore, he doesn’t follow a story-line since the

    asked by Franco on May 24, 2010
  56. Chemistry

    Given the following balanced equation: 2Na + Cl2 ---> 2NaCl A.List each element on the reactant side and each element on the product side and assign the correct oxidation number to each. B.Identify which element is oxidized in the reaction and which is

    asked by Samantha on April 26, 2018
  57. REDOX Balancing equations

    Al+NO3^-1-->Al(OH)4^-1+NH3 I am supposed to balance this reaction and label the reduction/oxidation reactions and oxidizing/reducting agents I have my specific steps to solving this but when I get to step 2 I do not see how I can split these into 2 half

    asked by Aparicio on June 10, 2009
  58. Problem Solving

    Nick is chief engineer in a phosphate fertilizer plant that generates more than 1 million tons per year of gypsum, a waste collected in a nearby pile. Over many years, the pile has grown into a mountain containing 40 million tons of waste. There is little

    asked by Aya on November 25, 2011
  59. Problem Solving

    Nick is chief engineer in a phosphate fertilizer plant that generates more than 1 million tons per year of gypsum, a waste collected in a nearby pile. Over many years, the pile has grown into a mountain containing 40 million tons of waste. There is little

    asked by Aya on November 25, 2011
  60. Technology: ms.sue, bobpursley

    24. From a technological viewpoint, explain why farming has gotten less labor intensive over the last hundred years. You two helped me on this yesterday, and I combined your answers and added my own to it. Please let me know if it is okay. 24. Farming has

    asked by y912f on April 8, 2010
  61. History

    I need to come up with 3 questions to ask farmers about new machinery and farming techniques that helped them farm the Great Plains. I know the new machinery: a plow that made several furrows at once. Harrows, equipped with spring teeth to dislodge debris

    asked by Jenny on August 5, 2014
  62. math!!

    Solve each problem 3. 2/3 = 1.2/x x = 18

    asked by mistake on November 19, 2017
  63. Chem202 - for DrBob222

    Dr. Bob222: There is a problem you answered .100M HClO2 titrated with .080M NaOH I can work the problem many times but I am getting 7.30pH and the answer says 7.38 using quad. I used quad and still get 7.30. I also do know how you go from the

    asked by Steve on May 26, 2013
  64. Physics

    I'm learning about Newton's Laws of Motions and I'm having trouble understanding these questions: "A rear-end collision between a soft-drink truck and a car occurs. The truck driver claims the car backed into him, while the auto driver claims that the

    asked by Stuck on July 8, 2010
  65. Algebra

    Ok a few questions I want to check answers on - -x+4-9x+3¡Ý 7(x-2) -10x+7¡Ý7x-14 -10x-7x¡Ý7x-7x-14 -17x¡Ý-21 -17x/-17¡Ý-21/-17 x¡Ý21/17 or x¡Ü21/17 ?? One I do not understand at all - The linear equation y=3x-5 graphs as a

    asked by John on October 8, 2007
  66. English

    1. What do people all around the world love doing? - They love eating street food. 2. How is street food? - It looks good and tastes delicious. 3. What is New York City like? - It is a busy city. 4. What's there on almost street corner? - There is fast

    asked by rfvv on May 26, 2015
  67. HELP MATH

    how would u simplify this problem i think it is 60 --- x^6 am i right the problem is 5 4 3 _ + ___ - ___ x x^2 x^3 I'm going to assume your problem is this: 5/x + 4/x^2 - 3/x^3 To simplify, find a common denominator, which is x^3 in this case. Using the

    asked by cassii on August 8, 2006
  68. government

    We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness. — That to secure these rights, Governments

    asked by shane on August 18, 2016
  69. Spanish

    Can someone please check if my answers are correct? combina las palabras lógicamente. 1. la langosta 2. la salchicha 3. el ají 4. el caldo 5. el sacacorchos 6. hornear 7. los ingredientes 8. la sal 9. el durazno 10. el aderezo a. el vino b. la toronja c.

    asked by Sarah on February 28, 2013
  70. Spanish 2

    Re-write the sentences in Spanish. Are my answers correct? Thanks! :) 1.) I used to eat. 2.) Clean!! 3.) You (informal) have seen the movie. 4.) I practiced yesterday. 5.) When I was young, I played soccer. My answers: 1.)Yo solía comer. 2.)Limpio!

    asked by Fiona on May 19, 2014
  71. stats

    An athletic director found that 31% of the football players have an A average in school. If 2% of the students at the school play football, what is the probability that a student chosen at random will be a football player with an A average? suppose a

    asked by dometrice on June 19, 2013
  72. Philosophy

    Martin Luther King, “Letter from Birmingham Jail,” draws from the thought of Thomas Aquinas in saying “an unjust law is a human law that is not rooted in eternal and natural law. Any law that uplifts human personality is just. Any law that degrades

    asked by Christopher on April 30, 2013
  73. For -Ms Sue

    Claim: the lateral (side ) surface of any area of any cylinder can is larger than the circlar surface area of its bottom. Which of the following is an example showing that the claim is false? a. a can with the diameter of 5 inches and height of 10 inches

    asked by Mary on May 25, 2011
  74. Analytical chemistry

    I did the next problem, i don't have the results for it and i just want to know if i calculated the mass for Fe2O3 the right? A sample is a mixture of iron oxides (Fe2O3 and FeOOH). It's known that at 200°C this reaction occurs: 2FeOOH(s)-> Fe2O3(s) +

    asked by Gloria on September 7, 2013
  75. History

    So I was reviewing my online lecture for school, and I noticed something the teacher had said. The Plains Indians planted seeds in the Spring, hunted buffalo and small game in the summer, harvested crops and made sure there was a good food surplus for

    asked by Katt on September 8, 2014
  76. math

    Find the cost of buying 4 dozen of exercise books at sh 6000 per dozen,a half dozen of pencil at sh 2050 per dozen,5 dozen rulers at sh 3600 per dozen #i need anyone to help me please# and in case someone know where i can get such the questions,i am kindly

    asked by kelvin on February 22, 2017
  77. Chemistry

    Can somebody check my answers? I Failed this test one time already. I do not want to fail it again. 1. When a pair of electrons is shared between two atoms, a covalent bond is said to have formed. Most often, the pair is formed A. by excess valence

    asked by Amanda on August 26, 2011
  78. Organic Chemistry

    Which statements are FALSE about selecting a solvent for recrystallization? (Select all correct answers.) Any solvent can be used for recrystallization as long as the compound dissolves in it. The compound should exhibit a high solubility in the solvent at

    asked by Maria on April 29, 2010
  79. Math

    What is the approximate circumference of a circle with a radius of 6 centimeters? A.12 B.18 C.24 D.36 My teacher says it's D and I agree but for the next question he says it's 12 and aren't these two questions the same? What is the circumference of the

    asked by Jerald on March 25, 2013
  80. math

    A couple plans to save for their child’s college education. What principal must be deposited by the parents when their child is born in order to have $100,000 when the child reaches age 18? Assume the money earns 4% interest, compounded quarterly.

    asked by denise on November 15, 2013
  81. pronouns/nouns

    Could you please help with some of my homework questions of nouns and pronouns We can help you better, if you give us the specific questions. However, here are some sites that may be helpful. I got them by using the key words "noun pronoun" to search on

    asked by Sandra on September 5, 2006
  82. probability

    Consider a medical screening excersis for a disease that in the case that indicte that 5 people of 1000 people screenedhave the disease.the screening process is known to give a false positive 3% at times and a false negative 1% at times.what is the

    asked by israel on January 14, 2016
  83. PLS HELP URGENT

    Only one of the following reactions occurs. HCl + F HF + Cl For the one that does occur which side is favoured? Explain WHY the other reaction will not occur.

    asked by Jules on May 27, 2014
  84. Inorganic chemistry

    The following reaction occurs spontaneously. 2H+(aq)+ca(s) Ca2+(aq)+H2(g) write the balanced reduction half-reaction

    asked by Steve on April 11, 2009
  85. science

    Explain how a mutation in an individual's DNA occurs, and describe the effect it may have on the individual's traits.

    asked by brandi on December 13, 2016
  86. math problem solving

    the digit 5 occurs two times in the population of fairbanks. what is the value of each 5? explain your answer fairbanks- 35,252

    asked by janice on August 28, 2014
  87. Physical science

    Consider the following reaction that occurs at STP:what mass of N2 gas is needed to react with 12g H2 gas?

    asked by Thandi faith mapili on September 2, 2015
  88. science

    What kind of chemical bonding(chemical elemants) occurs in bricks, elastic, and rope

    asked by long on March 15, 2012
  89. math

    if the probability that an event E occurs is 1/p+1, then find the probability that E does not occur in terms of a simple fraction

    asked by Lala on May 25, 2017
  90. physical science

    when a physical change in a sample occurs which of the following does not change? a. shape b. temperature c. volume d. composition d?

    asked by jenna on December 8, 2017
  91. Science

    Explain how a mutation in an individual's DNA occurs, and describe the effect it may have on the individual's traits.

    asked by Tordy on October 23, 2017
  92. Philosphy

    DuBois claims that this occurs when the stronger members in society do not protect the weaker members:

    asked by jasmine on September 30, 2014
  93. math

    if the probability that an event E occurs is 1/p+1, then find the probability that E does not occur in terms of a simple fraction

    asked by Lala on May 25, 2017
  94. ALGEBRA

    Perform the indicated operations and write the answer in the form a + bi, where a and b are real numbers. Problem #1 (3+2i)squared Problem #2 icubed-isquared

    asked by Dawn on February 9, 2010
  95. Math

    A marathon runner runs 10 1/2 miles in 2 hours. What is her rate? Write an expression to represent the problem. Solve the problem:

    asked by Amy on January 23, 2017
  96. algebra

    Can someone show me how to use the quadratic formula to solve this problem.This is for extra credit.I don't uderstand how to do this, so can someone point out the steps so I can be able to do the other five problem like this one. Thanks again for your

    asked by Trina on September 4, 2010
  97. math

    Write an addition problem in which, when the addends are rounded to the nearest ten, the sum is 90. Then explain how you use estimation to solve the problem.

    asked by grace on January 5, 2015
  98. Math

    Write an addition problem in which, when the addends are rounded to the nearest ten, the sum is 90. Then explain how you use estimation to solve the problem.

    asked by Kelly on May 15, 2012
  99. Algebra

    multiplying sq rts sqrt18a^7b times sqrt27a^8b^6 I think I need to collect like terms such as the a's and b's. My big problem is order of operations. Every problem I do looks so different.

    asked by Marysvoice on February 3, 2008
  100. accounting

    I've done the entire problem and I am at a complete loss on how to find the manufacturing overhead at the end. Help please. Problem below. I've scanned the pages, but can't put them up here.

    asked by Ashley on February 6, 2009