Posts by samantha

Total # Posts: 1,796

  1. Science

    Which type of rock forms from magma and contains large interlocking crystals?
  2. Chemistry

    3.A sealed balloon contains 62mL of carbon dioxide is in a freezer at -15degrees celsius. The balloon is then removed to the interior of a car that has been sitting there this summer sun and is at 72degrees celsius. Assuming the balloon remains sealed and the pressure is ...
  3. Chemistry

    2.Which gas law would you use to calculate the new pressure for a gas when the volume of the trapped gas changes well temperature remains constant?
  4. Chemistry

    1.What is important to remember about the temperature unit for any gas law calculation?
  5. Chemistry

    Can someone link me videos and sites that can teach me the formula to solve these? Or try to help me understand how to solve these? 1.You have 200g of a radioisotope . If the half-life of this radioisotope is 20 days, how many grams will remain after 40 days? 2.Calculate the ...
  6. Chemistry

    Thanks
  7. Chemistry

    1.what is the type of radiation (alpha,beta, or gamma) is represented by each of the following. A)the most penetrating type of radiation is B) When this particle is emitted an atom of carbon (atomic number 6) will change to an atom of nitrogen (atomic number 7) C)helium nuclei...
  8. Math

    Solve the system of equations using Row Operations x + y - z = 6 3x - 2y + z = -5 x + 3y - 2z = 14
  9. Algebra

    How can you write the expression with a rationalized denominator? 3sqrt 2/3 sqrt 6 A) 3sqrt9/3*** B) 2+3sqrt9/6 C) 3sqrt9/6 D) 3sqrt72/3 Let f(x)=x^2+7 and g(x)=x+3/x. find (g*f)(-5) A) 35/12 B) 35/32 C) 32/35 D) 11/25*** Please correct me if I’m wrong
  10. Chemistry

    1.Identify the type of isomer (structural, geometric, or optical) each of the following pairs represents. A. CHBrClF and CHBrFCl B. n-butane and 2-methylpropane C. trans-2-pentene and cis-2-pentene For A I think it would be Geometric For B I think it would be Optional And for ...
  11. Chemistry

    I keep typing in D and it’s still saying ammonia
  12. Chemistry

    For B it gave me this when I looked it up on google: (Related Compounds) Acetaldehyde Acetamide Acetic anhydride Acetonitrile Acetyl chloride Ethanol Ethyl acetate Potassium acetate Sodium acetate Thioacetic acid Which one do I go with???
  13. Chemistry

    1. Identify the organic compound type for each of the following (for example: ketone, ester, etc) A. Propanol B. CH3COOH C. ROR D. CH3NH2 E. Methyl methanoate My answers: A. Alcohol B. Ethanol C. Ether D. Ammonia E. Ester Please help correct what I’m wrong on.
  14. Chemistry

    Thank you so much.
  15. Chemistry

    I tried looking it up and etc but I couldn’t find anything about it. I don’t even know none of the things listen in there. Or what ketone or ester is
  16. Chemistry

    1. Identify the organic compound type for each of the following (for example: ketone, ester, etc) A. Propanol B. CH3COOH C. ROR D. CH3NH2 E. Methyl methanoate
  17. Chemistry

    For B) I was talking about the Cl’s lol the arrows had moved it the wrong place (I figured that would happen
  18. Chemistry

    Am I doing this right? A. Reactant ——————— Element(Na) Reactant(2) Product(2) Element(Cl) Reactant(2) Product(1) {Na and Cl are different element so I’m guessing there Reactant and Products are different from each other’s} B. ...
  19. 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 reduced. C.Identify ...
  20. Chemistry

    4HCI(g)+O2(g)<——>2CI2(g)+2H2O(g) How would the equilibrium shift if: A. The amount of HCI was increased? B. If water was added? C. If oxygen was removed?
  21. Chemistry

    I need help plugging these in. I didn’t understand what DrBoB222 meant 2.A student starts with a titration by placing 30.0mL of 0.25M NaOH into a flask with 3 drops of phenolphthalein. The student then titrated to the endpoint using 18.0mL of HCI. Calculator concentration...
  22. Chemistry

    1) 1.43? I’m confused on number #2
  23. Chemistry

    (I need help with these two questions. I don’t know how to solve it.) 1. A student takes 215mL of a 5.0M HCI solution and places it into a beaker. The students then adds enough water to the beaker to make 750mL. Calculator molarity of this new solution. 2. A student ...
  24. Chemistry

    (My answers) 1. A sample of gas occupies 33 mL at -101 Celsius what volume does the sample occupy at 97 Celsius? (70.578) 2. There is a balloon that contains 2125 L of gas at 55 Celsius and 99 kPa. This balloon rises to an altitude where the pressure is 42kPa and the ...
  25. Chemistry

    Thank you
  26. Chemistry

    I need help solving these. I don’t know what formula to use for them. There’s the (Boyle’s law, Kevin’s law, Charles law, and Gays law). Can someone help me figure out which law I’m supposed to use? —————————...
  27. Algebra

    THanks you Scott is there a specific way I’m supposed to put it in the calculator?
  28. Algebra

    Today I’m learning something new but I don’t know how to solve this. I have 2 questions about it but I feel as if, if someone explain/ show how I can complete the first one I’ll be fine with doing the second one in my own. How is a graph different from the ...
  29. Algebra

    I actualy found a khan academy thing that helped me out a few minutes ago, before i saw this, but thank you anyways! <3
  30. Algebra

    Let g(x)=3x+2 and f(x)=(x-2)/3 Find the value. f(g(0)) I think I figured out part of it. g(0)=3(0)+2=2 g(2)=3(2)+2=8 f(8)=((8)-2)/3=6/3=2 If this is correct, idk where to go from here.
  31. Algebra 2

    I think I figured out part of it. g(0)=3(0)+2=2 g(2)=3(2)+2=8 f(8)=((8)-2)/3=6/3=2 where do I go from here?
  32. Algebra 2

    Tysm. Could u help me with another? I would use ur method, but i dont know how to implement it here. Let g(x)=2x and h(x)=x^2+4 Find the value. (goh)(0)
  33. algebra

    What is the result when 2x^3 -9x^2 +11x-6 is divided by x-3? I have no idea how to even start solving this.
  34. algebra

    Solve In 4+in(3x)=2 round to the nearest hundredth
  35. math

    So what is the axis of symmetry and the vertex?
  36. math

    Nope. Just a question from my algebra work that Im stuck on. Im in algebra 2
  37. math

    Compare the function with the parent function. What are the vertex, axis of symmetry, and transformations of the given function? y = |10x-2| -7
  38. math

    i listed all the ones i could choose from for that question. it was distributive. thanks for ALL THE HELP. ;(
  39. math

    The candidates? You mean the property's? The options are A) Distributive property B) Associative property of addition C) Associative property of multiplication D) Communicative property of addition
  40. math

    Name the property of real numbers illustrated by the equation -3(x+4)=-3x-12
  41. math

    Thank you so much both of you! Do you think you could help me out with any more?
  42. math

    Use the quadratic formula to solve the equation -x^2 + 7x = 8
  43. math

    Alright thank you! That was one of the answers. Do you think you could help me with a few more questions?
  44. math

    OH yes woops. Here is the rest of the system. -12x-13y+13z=15 7x-10y-3z=11 7x+14y+5z==-5
  45. math

    which matrix represents the system of equations below -12x-13y+13z=15
  46. History

    I also agree with A. As long as I get it right on my test.
  47. Math

    The velocity time graph shows the movement of a particle alobg a straight line. The particle passes a point, A, when t=0. It maontains a constant spee, u ms -1, for T seconds and then decelerates uniformly before coming to rest at B. If the average speed for the qhole movement...
  48. Chemistry

    Good morning. I need help solving 2 problems for chemistry. For #1 I need someone to check my work and tell me if I did it wrong and show me how and where I went wrong. And for #2 I need someone to help me figure out how to solve it and explain. 1. With the balanced equation ...
  49. Math

    A machine produces 75 widgets an hr how many widgets would the machine produce in six mins
  50. Chemistry

    Can you give me a better way to solve it please because I’m a tad bit confused on how to solve for it
  51. Chemistry

    3.65 moles?
  52. Chemistry

    If you have 2.2x10^24 molecules of O2 at STP, how many liters of O2 do you have? Can someone show me how to solve this
  53. Chemistry

    Oh okay thank you and sorry. I have 2 types of apps for calculating things. One helps do fractions and the other puts it in decimal form. But thank you for explaining where I went wrong.
  54. Chemistry

    Co2= 63/44=1 19/44.... did I solve the (?) correctly? I feel as if I didn’t.
  55. Chemistry

    Is there a chemistry teacher for jiskha? Or someone that knows what my teacher is talking about? :’( He wants me to: Calculate the number of moles of CO2 in 63.0g of CO2
  56. Algebra

    1.what is a polynomial function in standard form with zeros 1,2,-2, and -3 A. X^4+2x^3+7^2-8x+12 B. X^4+2x^3-7^2-8x+12 C. X^4+2x^3-7^2+8x+12 D. X^4+2x^3+7^2+8x+12 I’m guessing B but I’m honestly not sure on what I’m doing
  57. statistics

    In 2000, National data suggested that 26% of all U.S. businesses were owned by women. In 2009, a consulting firm surveyed a random sample of 700 U.S. businesses and found that 28% of them were owned by women. Is this evidence of an increase in the percentage of businesses that...
  58. Math

    When doing a calculation involving zoning laws, Tim comes across the following expression: fraction a- open vertical bar a close vertical bar over denominator a end fraction, where a is either a positive or a negative number. (A) What is the value of the expression when a ...
  59. Math

    Tim’s client wants to sell her house and needs an estimate of its value. To get an initial estimate, Tim averages the sale price of similar homes in the area. He also adjusts the value of each of these homes using a multiplier to take any differences in value into account...
  60. Algebra

    Simplify the expression -5+i/2i I typed this problem into mathway and they told me the answer was 1/2+5i/2 but wouldn’t show me how they got it. They said to (“multiply by the conjugate and simplify”) but I have no clue on what the conjugate is and how to solve...
  61. Algebra

    I tried doing that but I think I went wrong somewhere because I did 7x-9y=21 -x-18y=-3 -2•7=-14 -2•9=-18 -2•21=-42 14x-18y=-42 -x-18y=-3 And got -x-0y=-3 -x=-45 ...I know this is wrong, can someone help me
  62. Algebra

    How do I solve this For (-x)? (Do I just make -x equal 1 or 2?) I’m suppose to solve the equation by elimination. (Can someone give me steps to solving it and I’ll try to do it and you guys check my work?) 7x-9y=21 -x-18y=-3
  63. Algebra

    Ok, I tried watching a video on how to solve a system by substitution. But I feel like I did it wrong, so can someone check my work and show/ tell me where I went wrong. So the system by substitution -2x-3y=-2 Y=2x+6 First I combined my 2 equations but without y so I’d ...
  64. math

    Four friends go to a restaurant. After adding a $6 tip they decide to split the bill evenly. If they each paid $9.26, how much was the bill
  65. Algebra

    Thank you very much Reiny for showing me the proper steps. and Thank you too Damon for trying to help me.
  66. Algebra

    1. I need help solving the system by substitution -x-y-z=-8 -4x+4y+5z=7 2x+2z=4
  67. Algebra

    So it would go like -2x+2y+3z=0 2x+3y+3z=5 Equal 0x+5y+6z=5? -2x-y+z=-3 2x+3y+3z=5 Equal 0x+3y+3z=5 But if I multiply 3/2 with what you got (aka) 2 & 3 ... 2y + 4z = 2 ... (B) 3/2*2=3 3/2*4=6 3/2*2=3 So I’d plug in the variables and get 3y+6z=3 And then subtract 5y + 6z...
  68. Algebra

    So does that mean for “B” I was right? Or did you just go with mine?...and I’m still confused on how you found x, for everything else I understand now. Thank you
  69. Algebra

    So does that mean for “B” I was right? Or did you just go with mine?...and I’m still confused on how you found x, for everything else I understand now. Thank you
  70. Algebra

    So it would go like -2x+2y+3z=0 2x+3y+3z=5 Equal 0x+5y+6z=5? -2x-y+z=-3 2x+3y+3z=5 Equal 0x+3y+3z=5 But if I multiply 3/2 with what you got (aka) 2 & 3 ... 2y + 4z = 2 ... (B) 3/2*2=3 3/2*4=6 3/2*2=3 So I’d plug in the variables and get 3y+6z=3 And then subtract 5y + 6z...
  71. Algebra

    Can someone show me how to solve the system by elimination with? -2x+2y+3z=0 -2x-y+z=-3 2x+3y+3z=5
  72. Algebra

    I need help learning to solve substitution. I have a problem that says solve the system by substitution -4.5x-2y=-12.5 3.25x-y=-0.75
  73. math

    The Nuthouse offers a mixture of soy nuts and almonds. Almonds sell for $7 per pound and soy nuts sell for $5.50 per pound. The Nuthouse will make 20 pounds of the mixed nuts and sell the mixture for $5.95 per pound. The following equations represent the problem of keeping the...
  74. Math

    -$6
  75. Math

    Divide
  76. Math

    The value of a piece of office equipment is changing at a rate of -$175 per year.how long will it take for the change in value to be -$1,050?
  77. Math

    27
  78. Math

    A football team lost 9 yards on each of three consecutive plays. What was the team's total change in position for the three plays?
  79. Algebra

    I'm really confused and I just don't understand what to do. Please help! Simplify each expression by combining like terms -8(n - 5) + 4(n + 1) = ? Please help!
  80. Math

    A box turtle Marcos found is 0.115 of a meter long.What is this length in expanded form?
  81. ELA grade 10

    Iam working on the same question. I am confused by what it is asking. I picked a selection, but I don't understand the quote and what I am supposed to write
  82. Math

    The width of a rectang;e is w=r-5 and the area is r^3-24-5. What is the length? Please tell me how you solved. Thank you.
  83. Social Studies

    Number 2 is b swear
  84. English

    Oh then #2 is A Okay thank you again Ms.Sue
  85. English

    1. Identify the correctly punctuated sentence. A. Monarch butterflies migrate long distances each year—other butterflies live in southern climates throughout the year. B. Monarch butterflies migrate long distances each year, other butterflies live in southern climates ...
  86. English

    Nahida is the granddaughter of the old lady The old lady is the patient The mother is her doctor she is the one that cured the old lady And the boy is the one talking calling people an old lady because she and the girl Nahida is not related to him That's why he said his ...
  87. English

    1. Read the following passage from "The Swimming Contest". "Come over here, Nahida," the old lady said," and kiss the hand of the hakima who cured your grandmother. And this is her son." Nahida came hesitantly into the room and stood in front of ...
  88. English

    Oh...I'm sorry. I thought since he wanted to go somewhere to listen to records it was in future tense because he wants them to do it meaning in the future. That's where I had got confused. But thank you for clarifying it. I actually thought that one couldn't have ...
  89. English

    Yes that I know. But they want us to find something that does not have future conflict with Abdul-Karim or the narrator. So I'm confused. Are you saying that my two answers are wrong and option C is correct or are you giving me an example of a future event I'm very ...
  90. English

    1. All of the following quotes from "The Swimming Contest" are intended to foreshadow the future conflict between the narrator and Abdul-Karim EXCEPT A. "But it's not true that we're driving the Arabs out. We are out for peace, not war."***** B. &...
  91. English

    Yes ma'am. Okay, I'll stick with Samantha. I only changed it because I didn't want you guys to get annoyed with me. But thank you so much for all your help and. Sue :) you and Reed are actually my favorite teachers here who help people :) I see you guys all the ...
  92. English

    1. Read the following passage from "The Swimming Contest." With a sigh my mother replies, "My husband's no longer alive, either. But his house and his father's house aren't here; everything remained over there, abroad, and I live in a rented ...
  93. English {2 Questions}

    1. Identify the statement that is a verifiable fact. A. Teenagers seem to prefer texting to talking when it comes to cell phone use. B. Lifeguarding is one of the easiest and most lucrative summer jobs for teenagers. C. The number of teenagers who own and use smart phones is ...
  94. Trig

    Right triangle PQR with the right angle at Q has one side measuring 46 feet and the hypotenuse measuring 54 feet. Find the other side as a radical in simplified radical form and to the nearest tenth.
  95. Trig

    Is a triangle that has sides which measure 8, 15, and 17 a right triangle? Justify your answer, ie,
  96. Trig Help Please

    A smokestack is 200 ft high. A guy wire must be fastened to the stack 30.0 ft from the top. The guy wire makes an angle of 42.0° with the ground. Find the length of the guy wire.
  97. Trig

    A conveyor is used to lift paper to a shredder. The most efficient operating angle of elevation for the conveyor is 35.2°. The paper is to be elevated 16.0 m. What length of conveyor is needed?
  98. Algebra 1

    The growth of Trevor's lawn can be modeled by the equation y = .4x + 7, where the y is the height of the grass in centimeters, and x is the number of days since the lawn was last mowed. what is the meaning of the y-intercept of this equation? a) Trevor mows the lawn once ...
  99. Pre calc

    Find all primary solutions (i.e. 0 ? ? < 2? ) of the equation cos(2? ) = 4 ? 3 cos(? ). Find all primary solutions (i.e. 0 ? ? < 2? ) of the equation cos(2? )cos(? ) = sin(2? )sin(? ). Please can somone help and show all work Thank you these two examples would help me ...
  100. Pre calc

    Find all primary solutions (i.e. 0 ? ? < 2? ) of the equation cos(2? ) = 4 ? 3 cos(? ). Find all primary solutions (i.e. 0 ? ? < 2? ) of the equation cos(2? )cos(? ) = sin(2? )sin(? ). Please can somone help and show all work Thank you these two examples would help me ...
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