Calculus (Answer Check)

88,628 results, page 8

  1. math check my answers

    1. 2(x+3)squared-6x+5=0 Answer= 2xsquared+6x+23=0 2. 3xsquared-6x+5=-2(x+1)-10 Answer= 3xsquared-4x+17=0 How would I solve from this point?
  2. math plz help ;-;

    What is the equation of the line containing the two points (-4, 8) and (1, -7)? a.y=-3x b.y=3x+4 c.-3y=x-4 d.y=-3x-4 plz check if my answer is correct. My answer is c ^^;
  3. student supervision

    what is another name for the illness known as pediculosis? (a)chicken pox (b)ringworm (c)strep-throat (d)head lice(my answer) who does most of the talking in a student conference? (a)student(my answer) (b)teacher (c)teacher aide (d)parent when your checking out books where ...
  4. Please check my Calculus

    f(x)=x^n , where n is a positive integer greater or equal to 2. The graph of f(x) will have an inflection point when n is A. Even B. Odd C. Divisible by 3 D. For all values E. For no values I got B.
  5. Math

    Please check my answer thanks :) When repaing an installment loan of $3,500 with 20 equal monthly payments of $196 each , the apr of the loan is my answer is 13.5 %
  6. aims math<<<<need some one to check my answer

    okay this problem is simple... well my answer im unsure the answers i get arent an option. the problem is: 37-3[5+4(3-7)]
  7. 8th grade math

    Can you please check my answer? Selena received $42 commission for selling a computer for $1400. What percent is her commission? my answer: 3%
  8. english Please check answer

    10. In a research proposal, your sources should not have the potential to answer research questions. A.) true *B.) false Thank You
  9. Algebra 2

    Q: (x^2-9/x^2-5x)(5x-x^2/x^2-x-12)(x^2-8x+16/x-4) my answer: -1 How i solved: crossed multiplied 2 of the 3 sets of fractions the multiplied the answer to the remaining one and simplified. Can you check that my work is correct?
  10. Health care

    Please check my answer thank you :) What is based on per-person premiums or membership fees ? 1. Capitation 2. Fee-for service 3. Medical savings account 4. Retrospective payment system My answer is # 1
  11. Dogs Hunting Training

    Please check my answer thank you very much for all of your help :) Which of the following is not a trained ability ? A. Range B. Pattern C. Gun response D. Reponse to wind and scenting condititions My answer is C
  12. Math Check

    Hi! I need help with this one problem. My teacher told me that I could use any method to solve the following system and this is the answer I got; (1/2,2/5). Is this correct? 0.15r + 0.85s = 0.23 0.20r + 1.25s = 0.33 Write answer in (r, s).
  13. math, correction plz

    Can someone correct these for me.PLZ Problem#1 Directions solve equation ãx+4 = 3 My answer: x = 5 Probelm #2 Directions solve equation ã(4x+1) + 3 = 0 My answer x = 2 Problem #3 Directions solve equation ã(2y+7)+4=y My answer y= 1 and y = 9 the symbol a is a radical ...
  14. MAth answer check

    One solution of kx^2 +6x-k=0 is -3. Find the other solution I have the answer as -1/3 is this right?
  15. Math(Please check answer)

    Simplify each expression. 1)(sqrt7 + 5)(sqrt7 -6) My answer is sqrt 7 - 30 Am I correct?
  16. Check my answer?

    Write the fraction 8/9 as a percent. Round to the nearest hundredth of a percent where necessary. My answer: 88.9%
  17. Math

    Please check my answers 1. Which ordered pair is a solution of y=x-4? My answer is B (0, -3) 4.Which equation has (2,-1) as a solution My answer is D y=-2x+1
  18. Math

    Check my answer? 5p+9c=p Answer: C/9=6p/9
  19. Calculus

    For some reason the answer to this question is alluding me, Im sure its probbly something simple im just over looking. For what (numerical) value of the constant "c" is the function continous on (-?,?)?( Justify Answer) f(x)= x^2-cx if x>-1 cx^2+x if x?-1
  20. Math: Calculus

    Estimate the area under the graph of f(x)=x^2+2x from x = 4 to x = 10 using 3 approximating rectangles and left endpoints. I got 290.25 as my answer but it's wrong. Would someone explain to me how to answer this question.
  21. English

    Need to write whether the verb in Transitive or Intransive. 1. John received a silver trophy. A=trans 2. The judge gave him a check for $100. A=trans 3. The contestants all played well. Answer=intrans 4. Thomas won a silver plate in a different competion. Answer=trans 5. Kim ...
  22. math

    Can you double check my answer for me. The question is Corinne calculated the area of a paper plate to be 50.27 square inches. If the actual area of the plate is 55.42 square inches , what is the relative error in calculating the area, to the nearest thousandth. I got 0.093 I ...
  23. math, algebra II

    Can someone explain to me step by step how the book got to this answer i want to understand the steps....thanks Find the inverse, if it exists,for the matirx (*I used the underscore to separate the numbers within the matix) -2_1_3 3_-1_2 -4_2_0 the answer is: -4_6_5 -8_12_13 ...
  24. please check my answer

    please check my answer thanks :) You are the manager of The Candle Shop using the FIFO method of inventory pricing, what is the dollar value of the ending inventory if there were 17,000 units on hand Dec 31 Show all of your work Jan 1 5,000 @ $0.89 Feb15 10,000 @ $0.69 April ...
  25. math

    Double check please Write each of the following as a common fraction or mixed number. Write your answer in lowest term 28. 15.35 Answer: 1535 / 100 = 307/20 = 15 35/100 is 15 7/20 Complete each of the following statement, using the symbol < or > 5/16 _0.313 Answer >
  26. Chem answer check/ help

    For each of the following water-soluble compounds, indicate the ions present in an aqueous solution: NaI K2SO4 NaCN Ba(OH)2 (NH4)2SO4 would the answer to NaI be Na+ I-? Should there be more to my answer? Would K2SO4 be K+ SO-? Thanks for the explanation.

    Under the original constitution, which was the only part of the national government directly elected by the people? What is your answer to this question? We'll be glad to check your answer.
  28. Anatomy and Physiology

    PLease check my answer thanks The burn that involves destruction of the epidermis,dermis and subcutaneous layers. My answer A thrid degree burn
  29. maths

    decide whether the graphs of the two equations are parallel lines: 1. 2x+3y=5 9y+6x-1=0 answer: yes 2. 15+3x-10y=0 30x+24=10y answer: yes please check if this is right. thanks
  30. Algebra 1A

    could someone please help and check my answer thank you. simplify your answer, type an inequality symbol, then type an integer or a decimal solve 7 x + 2 <30 the solution is {x[< 30}, 0.30 is this correct?
  31. Derivatives

    Find the derivative of the following questions; ³√2t/(t^2-4) Every thing is under the ³√ and the / is a fraction bar. My answer is y'= t(2t)^3 Can you check my answer please
  32. Math (Check answers, please.)

    Hello. I am having some difficulty with this problem. Could you please check my answer? You start searching for a buried object by marking the center of a field as (0, 0), with coordinates giving distances in yards. Coordinates to the north or east are positive, and ...
  33. 5th grade Math

    Find the product. Estimate to check. 0.12 X 04 _______ O.108 How do I estimate to check? 0.07 X 9.2 ________ 0.644 How do I estimate to check? 0.848 X 3.2 _________ 2.7136 How do I estimate to check? Choose the better estimate 22 X 0.6 a.(12) b.(1.2) I chose a 2.3 X 4.8 a.(10...
  34. Calculus AB

    I'm trying to find the second derivative of h(x)= x^2 + cos(kx) My answer for h'(x) is 2x - ksin(kx) but I'm not sure if that's right. Then the answer I got for h''(x) was h''(x) = 2 - k^2cos(kx) but I'm pretty sure that's wrong based on the graph I was given. Is my answer for...
  35. More Rational Exponents!

    1. The optimal height h of the letters of a message printed on pavement is given by the formula . Here, h= (0.00252d^(9/4))/e d is the distance of the driver from the letters and e is the height of the driver’s eye above the pavement. All of the distances are in meters. ...
  36. Chemistry - check answers

    1) Which element has the largest first ionization energy? A) Rb, B) Fr, C) K, D) Na, E) Mg Answer: E 2) Which has the highest electronegativity? A) Na, B) Cs, C) Si, D) Te, E) Cl Answer: E 3) In which of the following are the bonds arranged in order of increasing polarity? A) ...
  37. grade 12 chem - check my answer again please

    Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS + 7O2 --> 2Fe2O3 + 4SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS / 0.266 mol = 7mol O2/ ...
  38. Language Arts - Please Check My Answer For This

    Please help me with the following: Read the sentence. Juanita used her affinity for numbers to help her design a computer program that relied on college-level math formulas, even though she was only in middle school. Based on the context clues in the sentence, what is the best...
  39. Language Arts

    Directions: replace the bold faced word with a contraction. 1. We will(bold faced) see you t the English class next week! Answer: We'll 2. There is (bold faced) no milk in the refrigerator. Answer: There's 3. There will (bold faced) be time to chat later. Answer: 4. It is (...
  40. precalculus

    can you check my answers? 1.Find the binomial coefficient. 12C3 1320 17740800 48 220 answer:d 2.Find the binomial coefficient. (10/7) 720 120 240 172800 answer:b 3.Which of the following is equivalent to 10C6? 6C10 16C10 10C4 10C10 answer:c
  41. Calculus

    For the demand function find the elasticity function. Problem 52. p=D(x)=18-Sqrt[x] My answer is [-36x^1/2 + 2x]/x However, the answer in book is [-2(18-x^1/2)]/[x^1/2]
  42. Calculus

    For the demand function find the elasticity function. Problem 52. p=D(x)=18-Sqrt[x] My answer is [-36x^1/2 + 2x]/x However, the answer in book is [-2(18-x^1/2)]/[x^1/2]
  43. calculus

    Find the exact value of: cos(arctan(2) + arctan(3)) Please explain how you got your answer. I have the answer, but I don't know how to get to it.
  44. calculus

    solve the following exponential equation. 8^x=3 what is the exact answer? a. x= ? b. there is no solution what is the answer approximated to 3 decimal places? a. x= ? b. there is no solution
  45. Calculus

    Solve the initial value problem 2y" + 5y' - 3y = 0 y(0) =7, y'(0) = 7 Can someone please help. The answer I came up with is 35 exp(-x) - 28 exp(-3x/2), but my answer is wrong.
  46. math. PLEASE HELP.

    Question: If A= 29 degrees and a= 4.6, find c. There is a diagram shown in the textbook. b is adjacent, c is the hypotenuse, and a is opposite. I know I'm suppose to use SOH CAH TOA, and i tried using tan, but Im not getting the correct answer. i looked in the back of the ...
  47. Calculus

    Lim x to 3 (-x^2)/((x^2)- 6x + 9) substitution i get -9/0 factoring i get same answer would that mean the answer is infinity? if not how could i prove that it isn't infinity
  48. Algebra

    Can someone check my work please? Write using positive exponents, and simplify if possible. 1. (–3x)^–2 answer: 1/9x^2 2. Multiply. Write the answer in scientific notation.
  49. English

    Please check my answer thanks :) THe question is which of the following is a sentence fragment. 1 When we stopped by the garden. 2 We stopped; she didn't. 3 Take the flowers to your mother. 4 When did you go ? I picked answer # 1 is that right
  50. life sciences/7 grade

    What is the 23 pair of chromosomes in a human cell called? Why are they important? Their are the sex chromosomes. They affect the gender. can you check my answer please ,and help me with an answer
  51. Language arts

    Check my answer please Which of the following would not be considered an asset? A) credit card debt B) a good credit rating C) an education Answer: A
  52. precalculus (check answer)

    A tree casts a 35 meter long shadow at a time when the sun is 41° above the horizon. How tall is the tree? Would the answer be 53 meters?
  53. precalculus

    can you check my answer? 2.Which of the following shows the best next step to prove the following by mathematical induction? n!>2^n, n≥4 1. When n=1 the formula is valid because 4!>2^4 24>16 2.Assuming that k!>2^k show that (k+1)!>2^k+1 (k+1)!=k!(k+1) a.k!(k+1...
  54. Calculus Please Check my answer

    The rate at which water flows into a tank, in gallons per hour, is given by a differentiable function R of time t. The table below gives the rate as measured at various times in an 8-hour time period. t---------0-----2------3-------7----8 (hours) R(t)--1.95---2.5---2.8----4.00...
  55. Calculus

    By applying Rolle's theorem, check whether it is possible that the function f(x)=x^5+x−5 has two real roots. Answer: (input possible or impossible ) Your reason is that if f(x) has two real roots then by Rolle's theorem: f′(x) must be (input a number here) at ...
  56. Reading

    ) Which of the following industries most likely originated the business-speak term "bandwidth"? A. Finance B. Real Estate C. Technology D. Health care I think the answer is C. Can someone please check my answer?
  57. Geometry

    Hello! Thanks for checking my question out! ____ 6) Name a pair of vertical angles. Image URL: My Answer: AFE DFE Could someone please check my answer? Thanks! - Da Fash
  58. Calculus

    The problem with these two questions is that I cannot determine the a and r. The 3rd question-I don't know what I did wrong. Thanks for the help! Tell whether the series converges or diverges. If it converges, give its sum. infinity (sigma) sin^n (pi/4 + n pi) n=0 answer: ...
  59. Math - Please Check My Answers

    Please help me by checking the following answers for me(There are 3 problems that I need someone to check). 3. A student is attempting to solve the equation below for the variable x. Which of the statements below best applies to the mathematical work shown? Given √(4x-6...
  60. Calculus

    Find the derivative of f(x) =cos^-1(x^2) Ok so I'm having a little confusion with the chain rule and I'm not sure if my answer is right... will the answer be... 2x(-cos^-2(x^2)(-sin(x^2)?
  61. Calculus

    Simplify. State the nonpermissible values. (3t^2+3t-6/2t^2-2t-4)(4t^2+4t-24/3t^2+6t-9) This is the way I tried solving this: 3t(t-1)6(t-1)/2t(t-1)4(t-1)*4t(t-2)12(t-2)/3t(t+1)9(t-1) (3)(t)(t-1)(2)(3)(t-1)/(2)(t)(t-1)(2)(2)(t-1)*(2)(2)(t)(t-2)(2)(2)(3)(t-2)/(3)(t)(t-1)(3)(3)(t-...
  62. calculus

    Okay, so I have this problem... this was the original: (t^2-1?t^2+1)^3 and then I got the derivative which looked like this after I finished all the other steps: 3(t^2-1/t^2+1)^2d(t^2+1)(2t)-(t^2-1)(2t)/ (t^2+1)^2 So now, the answer is 3(t^2-1/t^2+1)^2d 4t/(t^2+1)^2 But I am ...
  63. Health of young children

    5.) A child in your program has just returned after having chickenpox. You notice that she still has a few dry scabs. What should you do? A. Send her home. She is still contagious. B. Welcome her back and let her know what there is to do today. C. Allow her to stay, but ...
  64. grammar check PLZ HELP ;-;

    Which sentence contains an error in the use of end marks or commas? A.Miss K.C. Fairchild will lead the band in a Sousa march. B. Mom, what does B.C. mean? C.Dr. and Mrs. Majeck will attend the party on March,12,2007. D. Address inquiries to Ella Adams, 315 Elm St., St. ...
  65. math

    Can someone please check ny answers and tell me if I'm correct? I did the FOIL method for each of these.. 1.What is the simplified form of (x-2)(2x+3) My answer; 2x^2-x-6 2.What is the simplified form of (3x+2)(4x-3)? My answer; 12x^2-x-6 3.What is the simplified form of (4p-2...
  66. Calculus check

    Given f(x)=4+3/x find all values of c in the interval (1,3) that satisfy the mean value theorem. A. 2 B. Sqrt(2) C. Sqrt(3) D. +or- sqrt(3) E. MVT doesn't apply I got C
  67. math(CHECK ANSWERS)

    please check my answers. Mrs. Walters drove 160 miles on 5 gallons of gas. How many gallons of gas will she need to travel 256 miles? (ANSWER):160 divided by 5=32 256 divided by 32=8 Stephen read 90 pages in 6 days. If he continues reading at that rate, how long will it take ...
  68. Physics

    I have no idea how to do this. Anyone help? A cyclist passes a race check point at +5.5m/s and then accelerates ata constant rate of +.55 m/s^2. The cyclist forgot to check in at the check point, and after 20s turns back around to head back. How far did the cylist move from ...
  69. sentence correction

    I don't see anything wrong with this sentence: It will be greatly appreciated if the bill is paid by check when possible. You're right; there's nothing wrong with this sentence. But you can make it much better by putting it in the active and not passive voice. We would ...
  70. French

    Please check these: I don't know how to do some of the accents sorry:( Directions: Fill in the correct form of au, à la, à l', or aux 1. Elle prête la chaise ------ voisin. Answer: au 2. Ils sont ------ église. Answer: à l' 3. E(with an accent)Ecrivez- vous -------- garç...
  71. Agility Training

    Please check my answer thanks :) A gamble is a course that's A. determined by a series of colors. B. set out by the judge. C. established by another handler. D. the same from competition to competition My answer is B
  72. Science quick question urgent check my answer

    bacterial structures which could survive unfavorable conditions are called? Spores Flagella Cysts Granuless My answer: spores?
  73. Calculus

    Let g be a function that is defined for all x, x ≠ 2, such that g(3) = 4 and the derivative of g is g′(x)=(x^2–16)/(x−2), with x ≠ 2. a.Find all values of x where the graph of g has a critical value. b.For each critical value, state whether the graph ...
  74. Pre-calculus-ck answer

    how many different ways can the letters in the word SOCIAL be arranged if the letter C must be directly followed by the letter I? Answer: 720
  75. calculus

    find the area of the region enclosed by y= square root of x, y=x-2, and y=0. i use f(x) - g(x) and got the answer to be 2, but my classmate got 8/3 do i'm really confuse don't know whats the answer.
  76. biology can someone check

    1) What phase are daughter cells in as a result of mitosis? answer: Anaphase 2)During what phase of mitosis do centromeres divide and the chromosomes move toward of their respective poles? answer: prophase 3)Which phase of mitosis is the last phase that chromatids are together...
  77. math

    solve algebraically and check y=8x+3 y=-4x-21 8x+3=-4x-21 +4x +4x 12x+3=-21 -3 -3 12x=-24 x=-2 y=8x+3 y=8(-2)+3 y=-16+3 y=-13 (-2,-13) check y=8x+3 -13=8(-2)+3 -13=-16+3 -13=-13 y=-4x-21 -13=-4(-2)-21 -13=8-21 so -13=-13 these check, so did I do this correctly? Thanks for ...
  78. Check answer

    Does (-2)^7 = -2^7
  79. 5th grade Math

    Can you check my answer? 4. Solve. 6 tenths = ___ thousandths Answer = 600 5. Write 347.392 in expanded form. Answer: (3*100)+(4*10)+(7*1)+(3* 1/10) + (9*1/100)+ (2*1/1000) 9. Write in standard form (number name) for: three thousand four hundred eight-two and sixty-four ...
  80. Pre-CalcPlease check

    Please check: 1.Write in expanded form: this is a sigma notation- 4 on top signma in middle k=1 on bottom to right of sigma is (k-1)(k-2) I solved: k=1 (1-1)(1-2)=0(-1)=0 K=2 (2-1)(2-2) = 1(0)=0 k=3(3-1)(3-2)=2(1)=2 k=4 (4-1)(4-)=3(2)=6 answer: 0+0+2+6 2. Write 4+9+16+25+36+49...
  81. French

    could you please check these thanks. Directions: Indicate whether each of the following statements are true or false. 1. Avant de monter en avion, on passer par le controle de sécurité. Answer: Vrai 2. On sert un repas pendant un vol transatlantique. Answer: Faux 3. On ...
  82. Spanish-Please check and clarify

    Could someone recheck this-I don't understand the two follow up answers because they seem to contradict each other-Maybe its the question or wording I'm confused about but I still don't understand if this is true or false. I thought it was false.I'm sorry to be so thick about ...
  83. calculus

    A rancher has 1000 feet of fencing with which to enclose two adjacent rectangular corrals with a interior partition (consider as one pen). Use calculus to determine what the external dimensions of the pen that will maximize the enclosed area. Write your answer in the form ...
  84. Math

    Half of a pizza was broccoli and half was mushroom. George ate 2/3 of the broccoli and 1/4 of thee mushroom part. How much of the pizza did he eat? I did this problem but I wasn't sure of my answer so I needed someone to see if I am right or not. My answer is 1/6 and I got ...
  85. calculus

    Find the equation of the line tangent to at x=1. Give your answer in y=mx+b form as an equation. If b=0, make sure you put +0 after mx. For example, even if your answer is y=3x, type in y=3x+0.
  86. Calculus

    Given that f(150)=100, f'(150)= -2.5, approximate the value of f(151.5). The answer is approximately 96.25, but I'm unsure of how my teacher has gotten that answer. Can someone please explain this to me?
  87. Calculus

    Need help to find dy/dx: 1) y = (sin x) ^-1/3 answer dy/dx = - 1/ 3(sinx) ^4/3 2) y = sqrt 8 + sin(6x) answer - lost
  88. Math 8R - HELP! (homework qs. check)

    Simplifying Algebraic Expression Using the Distributive Property & Combining Like Terms Simplify: -3 (2+3x) + x - 5 -3(2) + -3 (3x) + x - 5 Answer - 6 + -3(3x) + x - 5 Is the answer is correct??? I'm getting a bit confused and struggling a lot in this problem. Please help me!
  89. Math Inequalities

    -9/8x greater than or equal to -1/16 can someone please check my answer? my answer is x greather than or equal to 1/18 is this correct? if not what is the correct answer and what is the correct way to solve this problem..maybe I missed a step or did not do math correctly....
  90. Accounting: Lock Box System

    What minimum reduction in the time to collect and process each check is needed to justify use of the lock box system? If 400 payments per day, 2,000 average payment size, Bank charge $.40 per check and interest rate is .015 per day. The answer depends on the value of time. For...
  91. Health 8th grade

    Please check my answer thansks :) Invasive sampling of the blood from the _______ would reval that the blood is mostly dexygenated My answer is pulmonary arteries
  92. Math - check me

    How many grams (g) are there in 7.4 kilograms (kg)? Multiply by 1,000 to make the conversion answer: 7,400 Choose the most reasonable meaure of weight. A cow a. 5,000 mg b. 50 g c. 500kg answer: c
  93. French

    Can you check these thanks. Le métro Directions: Completez 1. Il y a dix tickets de métr dans un ----------. Answer: carnet 2. On peut acheter des tickets au ----------- ou au -------------. Answer 1: guichet Answer 2: distribueur automatique 3. Les voyageurs attendent le m...
  94. calculus

    I'm trying to find the intersection point of y=x-2 and y=sqrt(x). I tried letting both equations equal each other but kept coming up with the points (4,1) and (1,4) however these aren't right as the answer should be (4,2) but I am unable to get this answer. Help please?
  95. Language Arts

    Read each sentence. Circle the contraction or contractions in each sentence below: 1. He's going to show me how to prepare dinner. Answer: Circle He's 2. Can you tell if she's your friend or enemy? Answer: Circle she's 3.We'll have to empty out our garage very soon. Answer: We...
  96. Math - double check me

    Kristi joggfed for 3/5 of an hour, swam for 1/2 of an hour, and rode her bicycle for 3/4 of an hour. How long did she exercise? a. 7/11 b. 9/40 c. 1 17/20 d. 1 7/20 answer: c Juan owned 3/4 of a family business. He sold 1/3 of the business to his aunt. What portion of the ...
  97. Calculus (Please check my work!)

    Suppose that y = f(x) = x^2 - 4x + 4. Then on any interval where the inverse function y = f-1(x) exists, thederivative of y = f-1(x) with respect to x is: (Hint: x^2 - 4x + 4 can be factored and rewritten as "something" squared.) Work thus far: Okay, so I know that I can ...
  98. Calculus

    I know how to find the interval of convergence, but I don't understand when to check for convergence at the endpoints (to see if I should include it or not) Could someone help me understand this? Thanks!
  99. Physics with work, pls help

    A proton is moving in a circular orbit of radius 11.8 cm in a uniform magnetic field of magnitude 0.232 T directed perpendicular to the velocity of the proton. Find the orbital speed of the proton. Answer in units of m/s. I came up with .118/2.83x10^-7 and it was incorrect. (...
  100. MATH HELP Calculus

    Im stuck on a lot of questions, here they are: 24 + 12 + 6 + ...(S7) Sn = 24(2^7-1)/2-1 S7 = 24(127)/1 S7 = 3048/1 Thats what I got as an answer, but it's wrong, the real answer is a fraction answer, and its 381/8. How did they get that??? The other one was: 512 + (-256) + 128...
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  72. 71
  73. 72
  74. 73
  75. 74
  76. 75
  77. 76
  78. 77
  79. 78
  80. 79
  81. 80
  82. 81
  83. 82
  84. 83
  85. 84
  86. 85
  87. 86
  88. 87
  89. 88
  90. 89
  91. 90
  92. 91
  93. 92
  94. 93
  95. 94
  96. 95
  97. 96
  98. 97
  99. 98
  100. 99
  101. 100