Math(Please help)

188,810 results, page 84

  1. Math

    Please help with this question. Determine an algebraic model for Alvins data and use it to make a reasonable prediction for the population in 2036. I am having trouble with the algebraic model. thanks
  2. Math

    The sides of a triangle form an arithmetic sequence with a common difference of 2. The ratio of the measure of the largest angle to that of the smallest angle is 2:1. Find the area of the triangle. PLEASE HELP!
  3. math

    i just forgot how to find the equation in slope-intercept form for a line. Can anyone please give me some hints to do it with "the line through (3,-2) with slope m=4/5" as an example? Thanks a lot!
  4. Math (Calculus?)

    [x^5(-3)(x^2+1)^-4(2x)]-(x^2+1)^-3(5)x^4] / (x^5)^2 Can someone show my how to simplify this, step by step? So far I got that the denominator should be x^10 because of the exponents, and (x^2+1)^-4 could be simplified as [(x+1)(x-1)]/4, likewise with (x^2+1)^-3, except the ...
  5. math

    i'm studying for a test on rational expressions and i just wanted to know the answers to some of the problems i am not too sure about... 1... 4y-2/8y-2.. i got 1/2 which restriction of 1/2 2...(x-3/3x-5)/3-x/6x-10.. i got 4 with restrictions of 3 and 5/3 3...3a+6/2a^2+7a+6..1/...
  6. math/urgent

    PLEASE tell me how you are supposed to come to the answer to this. and what is the answer: a number x is y more than a number y times x i'm a little confused, and i have to teach this to a student. thanks a lot
  7. math

    2,750um to Mm CF=10^12 2,750um=2,750*10^-12 What does CF stand for. small to big you divide, so why don't I divide by 5 lots of 1000. Can you please give me some examples of conversions like this one. Thanks
  8. Math

    How many 4-character license plates are possible with 2 letters from the alphabet followed by 2 digits, if repetitions are allowed? If repetitions are not allowed? could someone please help me with the formula, I don't understand it yet
  9. math

    the question asks to integrate cos(t)/ (5sin(t)+8)^2 the answer i got was xcos(t)/(5sin(t)+8)^2 this is not right i believe there is something wrong with the x in front of the cos.... please heplp
  10. math could you please help i don't understand

    in a competition 5 figure skaters will skate in a randomely assigned order. why can't you evaluate the product 5*5*5*5*5 to find the number of possible orders in which the skaters can skate
  11. math

    Peform each indicated operation by using LCD and simplify the result. Can you please show me the steps on how you got the answer because I don't understand how to these problems. Thank you. y+2 over y^2+2y+4 + 1 over y-2 z-3 over z^2+z-6 + 2z+1 over z-2
  12. Math HELP!

    I posted a few questions and then went back and posted how I thought they were supposed to be answered. Could someone please locate my earlier questions and tell me if I am on the right track?
  13. Necessary Math HELp

    2x + y = -5 3x +5y = 3 How come I have to multiply by 5 to make the y variables cancel, like what does that mean? I don't get how ur supposed to multiply like where and how? Im really stuck right now, please help:(
  14. Math/Trig

    The average temperature, in °F, for Atlanta, GA is modeled by the sinusoidal function y = 18.25 sin(pi/6 t - 2.09) + 61.15 where t is the time in months and January is t = 1. What is the average temperature for the month of February? How do I do this problem ? Please Help
  15. Math(Please check)

    Find the slope of the graph at y=sqrt 2x^2 +1 at the point (2,3). First I plugged 2 into the equation and got 3. Then the derivative of the equation is 4x and then I multiplied that by 3 and got 12. Is this correct?
  16. math

    1. find the values of s for which each function is continous: f(x) = [ x if x less than or equal to 1] [2x-1 if x greater than 1] 2. determine all values of x at which the function is discontinuous: f(x) = (x^2-2x)/(x^2-3x+2) Could someone please tell me how to do these ...
  17. math

    Please help me? y=log(x+1) a. Write the equation as an exponential equation and solve for x. b. Switch the variables in your answer to part a (Change x to y and vice versa). Write the new expression.
  18. math

    would you please check these for me thank you. +6+-5--4= 5 also Sara only has dimes and nichels in her coin jar,they are ina ratio of 3 to 5.If she has 120 coins in the jar,how many are dimes? 45 correct??
  19. Math

    Find all complex zeros for the following polynomial function. Please show all of your work. f(x) = x^4 - 91x^2 - 900 Hi, I need help... I'm not understanding this complex zero..
  20. Business Math

    Please confirm if I did this correctly: What is the Principal? Principal $21250 X 10% 2,125 What is the total amount paid by the consumer? 2,125 x 3.5 years 7,437.5 +21,250.0 28,687.50
  21. Math - Graphing a function

    Graph the function below. Determine the domain, range, and horizontal asymptote. Please show all of your work. Submit your graph to the Dropbox. f(x) = (3/2)^(4-x)
  22. Math

    Please help me. Is there a short cut way to arrive at this answer? Observe the pattern of letters ACCCEEEEEGGGGGGG... This pattern continues to repeat beginning with the letter A. What will be the 170th letter? Thank you
  23. Math(Can someone please answer!!)

    n [1.70E-2] = ln(0.144) - (k s-1)(3609 s) Solve for k. I have a TI30 calculator. Am I suppose to press just the ln button or do I have to press 2nd and then ln??
  24. Math need help

    y= sqrt(81-x^2) What length and width should the rectangle have so that its area is a maximum? (smaller value) (larger value) I have no clue how to do this, so if someone could please help! thank you
  25. Math

    hi! I need help with this question please help! The question is: Each tire of a bicycle has a diameter of 26 inches. if you start pedaling and the tires make 10 complete rotations, how far has the bicycle traveled? Thanks! :]
  26. Statistical Math

    Starting with the data values 70 and 100, add three data values to the sample so that the mean is 90, the median is 91, and the mode is 91. Please show all of your work.
  27. math

    can u please help me a printig shop charges a 75-cent minimum for the first 8 photocopies of a flyer. additional copies cost 6 cents each. represent the cost of c copies if c is greater than 8. thank u
  28. math

    A material has a half-life of 12 hours. If initially there are 4 grams of the material, how much is present after 8 hours? I know the answer is 8/3, but how would you solve this using calculus? please help.
  29. math

    please help. what is the probability that when you pick two cards, you will select at least one king out of two in a deck of six standard cards? (assuming there are no jokers)
  30. Math

    An equilateral triangle ABC has AB=20√3. P is a point placed in triangle ABC and D,E and F are the foot of the perpendiculars from P to AB, BC and AC, respectively. If PD=9 and PE=10, what is the value of the length of PF? Please work the complete solution.
  31. Math

    An equilateral triangle ABC has AB=20√3. P is a point placed in triangle ABC and D,E and F are the foot of the perpendiculars from P to AB, BC and AC, respectively. If PD=9 and PE=10, what is the value of the length of PF? Please work the complete solution.
  32. math

    Koley makes $4.00 per week for washing dishes. She pays her sister Amy $0.75 each time Amy does the dishes for her. Is that fair? Please explain how I get the answer because I don't understand it/
  33. math

    How do I set up the quadratic equation for this problem? 4.0= (2x)^2 / (1.0-x)(1.0-x) I know how to use the formula, but I have a hard time setting those equation to zero. Please explain step by step. Thank you
  34. math

    Can somebody please help me with this. thank you 89___89 the second 89 has a solid line on top of the number. Is this equal or greater than or equal to 89 without the line No one has answered this question yet.
  35. math

    Find the area of the shaded region. View the graph and image at: postimg.o rg/image/dg4kt89v1/ Please help me explain this one. I know the ans to this one but can not work out.
  36. ordering numbers( math) please help

    if you take five tests and come out with your grades. order these numbers from least to greatest 76% 8/10 90% 17/20 83% then find the average of the five quizzes
  37. Math

    A pizza parlor has 3 diffrebt crusts and 3 diffrent cheeses and 7 diffrent toppings . How many combinations are on a pizza with 3 topings 1 crust and 1 cheese ? Help please I got 42 and then was told I was wrong
  38. Math! Please check!

    Name the intersection of planes ADE and BEA. A- plane BED B- plane ABC C- line BD D- line AE My choice is D. (Sorry that I could not post an image)
  39. math

    A bottle of cordial contains 5litres ,of which 10% I'd pure fruit juice.hoe many liters of water must be added to dilute to 4% fruit juice.can anybody explain please,thanks
  40. math please help!!!!!

    Factor f(x) into linear factors given that k is a zero of f(x). f(x)=x^3+(12-4i)x^2+(32-48i)x-128i, k=4i In completely factored form, f(x) =____ (factor completely. simplify your answer)
  41. math problem (please help)

    What are the dimensions of a rectangular tract of land if its perimeter is 70 kilometers and its area is 300 square kilometers? km (smaller value) akm (larger value)
  42. Math

    Louis paid $42 for a dozen magazines with her annual and subscription to her favorite sport magazine. What is the unit cost for each magazine?(How many magazines did she subscribe to) Please show work.
  43. math please help

    In the diagram below, we have DE = 2EC and AB = DC = 20. Find the length of FG. I have no idea how to do this. I did a problem almost exactly the same and approached it the same way, it did not work.
  44. Math

    Which is NOT true about the Table? x: 1 | 2 | 3 | 4 | y: 1 | 4 | 9 | 16 | A. it shows a linear function B. x increases by 1 each time C. the rate of change is not constant D. y increases by a different value each time D please check
  45. Math

    Given that <1 and <2 are supplementary angles and that m<1=115 , explain how to find the measure of the complement of <2. Instead of giving just the answer can you explain in words of how you got the answer please!
  46. math

    Storm sewers are hollow cylinders with outside radius of 0.9 m and inside radius of 0.7m. If a section of storm sewer is 2.5m long, what volume of concrete is needed to make it? Please help..
  47. Math

    The length of one side of the school building is 100 feet. if you use a scale factor of 1:250, what is the length of your scale drawing? Please help me and explain how you get your answer!
  48. HElp MaTh PleasE!

    A multiple choice test has 5 questions each with 5 possible answers. Find the probability of answering all the questions correctly. A. 1/3,125 B. 1/25 C. 1/625 D. 1/125 How do you do this problem?
  49. MATH HELP PLEASE Explain

    Onondaga Electronics operates on a net-profit rate of 20% on its printer cables. If the markup is $8.95 and the overhead is $4.31, find the net profit and the selling price
  50. Math

    Bill's baseball bag weighs 4 pounds . If he takes out 2 pairs of cleats that weigh 6 ounces each . How much will his bag weigh? Please show the work
  51. Math

    Find the probability of the following event: tossing a coin tails up or rolling a number less than 4 on a number cube. I got 1/2 + 3/6 and got 1. The answer is 3/4. I don't understand what to do. Please help.
  52. 6th grade math

    You roll a number cube 20 times. The number 4 is rolled 8 times. What is the experimental probability of rolling a 4? A. 40% B. 25% C. 20% D. 17% How do I work this problem out? Please explain. Thank you.
  53. Math

    State the theorem or postulate that is related to the measures of the angles in each pair. Then find the angle measures. m∠3=(23x+11)°,m∠4=(14x+21)° Can you teach me this problem?? Please...
  54. Math help ASAP!

    Sydney has $972 to spend on tickets. If each ticket costs $27, how many tickets can she purchase? If there will be any money left over after the purchase, include it as a remainder. A.37 B.36 C.38 D.35 Please help! :<
  55. Math

    Please lead me in the right direction. I am so confused and I have been working on this one problem for an hour. I have the answer, but I want to know how to get to it. The answer is (1,1,0) Solve the system by elimination. -2x+2y+3z=0; -2x-y+z=-3; 2x+3y+3z=5
  56. Math

    Dollars Earned = y Dollars Saved = x Equation : y=4x+100 My problem : For each increase of $200 in earnings, what is the increase in savings? PLEASE ANSWER FAST I HAVE 10MINS
  57. Math

    A rectangle's length and width is a ratio of 17:2. The area is 136 square yards. What is the length and width. I have no idea on how to even attempt to work this problem. Please help!
  58. Math - Coordinate Geometry

    The vertices of a quadrilateral are A(-2,3), B(5,4), C(4, -3) and D(-3, -4). Prove that ABCD is a rhombus. Find the area of ABCD. Formula to find length: d = √(x2 - x1)^2 + (y2-y1)^2 Please show working out, thanks.
  59. math

    Create two different situations: one in which you use combinations and one in which you use permutations please help me with this question or give me some sites too look at, I don't understand.
  60. Math

    I need help please. Laurie left home and ran to the lake at 10 mi/h. she ran back home at 8 mi/h. If the entire trip took 27 minutes, how far did she run in all?
  61. Math

    A dog walker charges $10 to come to your house and then $2 per mile walked. She charged you $16. Which equation could you use to determine how far she walked your dog. Can you please help? Im thinking its 16+10=2m
  62. Math Trigonometry

    Hi guys, I was wondering if you guys can help me with this question. I'm not sure how to do this question. As I keep on getting something that's out of the unit circle. Please help! 17sec2(θ)-13tan(θ)sec(θ)-15=0
  63. math

    Three subjects Geography, Science and English in the library are in the ratio of 5:7:8 which they had increased by 20%,40% and 50%. Find the ratio of increased books # Please guys can you assist me this question#
  64. math

    Three subjects Geography, Science and English in the library are in the ratio of 5:7:8 which they had increased by 20%,40% and 50%. Find the ratio of increased books # Please guys can you assist me this question#
  65. Math help please!

    I need help with this one, could someone tell me how I would be able to do this? 1. Find the percent of change when the price of a radio changes from $40.00 to $44.00. A. 10% decrease B. 10% increase C. 36.4% decrease D. 40% increase Thanks!
  66. Math

    Need some help with setting it up please. Thank you. Joanna wants to buy a car. Her parents loan her 5,000 for 5 years at 5% simple interest. How much will Joanna pay in interest?
  67. Math

    It cost $20 for a concert ticket plus an additional $5 processing fee. Let t represent the number of tickets sold and C represent the cost. Write a function rule. Please help

    HELP ME PLEASE. 1.An isosceles triangle with each leg measuring 13 cm is inscribed in a circle . if the altitude to the base is 12 cm find the radius of the circle 2. Circles a and b are tangent at point c. p is on circle a and q is on circle b such that pq is tangent to both ...
  69. Math - 2nd try

    Please show me how to set up and solve: You have 6 cups of sugar. It takes 1 cup of sugar to make 24 cookies. The function c(s) = 24s represents the number of cookies, c, that can be made with s cups of sugar. What domain and range is reasonable for the function? math - ...
  70. to angie

    Please do not post responses to other students unless you can help them very proficiently with their specific problem or question. This is not a website for "personals" -- so please don't post any personal information about yourself or ask personal informtion of others. Thanks...
  71. science and history

    How did the apollo 11 space mission pave a way for 1.) technology 2.) science 3.) America 4.) space exploration Please note that we don't do students' homework for them. Once you have come up with a response to these questions, please re-post and let us know what you think. ...
  72. AED 200

    Can anyone help me with these. I want different views please. In separate paragraphs describe your approach to classroom organization, motivation, discipline, and teaching styles, given your current perspective. Contrast each element of this paper with the opposite approach (...
  73. Physics - urgent, please help!

    10pm. I asked "Show mathematically that to produce an image that is the same size as the object in a concave mirror, the object needs to be at twice the focal length from the mirror." and bobpursley answered: "1/o + 1/o=1/f 1/2f + 1/i=1/f 1/i=1/2f i=2f M=di/do= 2f/2f= 1 check ...
  74. Normal Public High School Chemistry

    Please assist me in answer this question please show me all the formulas used and the units and how to convert them if needed. Thank You. If the half-life of Ba (140, 56) is 12.75 dyas, how many atoms of (140, 56) Ba will be left after 9 weeks if there were initially 2.4 mol ...
  75. Science (7th Grade)

    My science teacher is really mean. And if I don't have the following questions done, I have a suspention! Please help!! 1) What discovery demonstrated that atoms are not the smallest particles? 2) Dalton did what to his theory that Democritus did not? 3) It is important for ...
  76. calculas(URGENT..... PLEASE....)

    1) A region is bounded by the line y = x and the parabola y = x2 - 6x + 10. What is the volume of the solid generated by revolving the region about the x-axis? would u please give the explanation with a detailed steps to the answer because i am not able to reach the final ...
  77. Algebra-Please check work

    I've reworked this and added on is any of it correct?Totally confused-learned this today and I don't get it-Please help Write the standard form of 9x^2 + 4y^2-72x+16y+124=0 I think the first step is to take the constant to right side so I have: 9x^2 + 4y^2-72x+19(x^2-8x+16) + ...
  78. pre ap physics

    a car with amass of 1120 kg starts from rest and accelerates to the speed of 17.5 m/s in 18.8 s. assume that the force of resistance remains constant at 402.5 N during this time. what is the average power developed by the car's engine? answer in units of W can you please ...
  79. Algebra please explain!!!

    A boat costs $92,000 and depreciates in value by 15% per year. How much will the boat be worth after 10 years? 18,112.45 78,200 18,941.98 69,000 Is the answer the first one? Could somebody write down the steps for me please? Pleas help asap! Thanks
  80. Please check history

    Please check! What was the effect of the depression of the 1890s on South Carolina? a. Gold was discovered in Alaska. b. Many banks failed and railroads went bankrupt. c. Paper money was no longer backed by gold.*** d. Inflation caused farmers to run large debts.
  81. Math-Statistics-please doublecheck my answers

    In the fall of 2000, 54% of the almost 34,000 first-year students attending one of the California State Universities had strong enough math skills to take an entry level course. 1)Based on a sample of 20 students, can we assume our calculations will be accurate? My answer is: ...
  82. Math! Please Check My Awnser!

    Hello! I need some help with math! I have tried to do this but I am unsure about my answers. My I will identify my answers with a "<--". Also, if I have missed one, please tell me the right answer! Also, Thanks for your help in advance! Have a nice day! 1. Which of the ...
  83. english

    Homework help please i need to pass? in the play a midsummer night dream for the character Hermia i need help answering these question as if i were Hermia. (answer the questions like something Hermia would say) please really in depth answers please What does it mean to be a ...
  84. Chemistry

    Someone help me with my titration molarity calculation please!? I have titrated 1.000 mL of Ca(IO3)2 with 2.197 ml of 0.022 M thiosulfate. First I found the moles of thiosulfate present with 0.002197 L x 0.022 M = 4.8388E-5. The mole ratio of S2O3^-2 and IO3- should be 6:1 (...
  85. Physics-Please check

    I posted this question this morning but I'm not sure of the response Damon provided. If you were in a rotor style ride and the riders accelerate until the speed of ride is reached- if the radius of the cylinder is 5.0m and the coefficient of friction between clothes and wall ...
  86. math

  87. Survey of Math 140

    on march 8, you sign a $4000 note with simple interest 10% for 240 days. You make partial payments of $1300 on May 26 and $2300 on july 31. How much will you owe on the date of maturity (November 3)? Please show work!!!
  88. math

    the distance of fencing reqired for 75 acres but fist changing it to meters squared i think that it is 304 969 m sq but i still don't know how much fence wire i need foe the circunferance please ckeck my work and give me the correct answer
  89. Math 222

    I am having difficulties trying to do rational expressions. I have to use the words Domain, Excluded Value, Set, Factor, and Real Numbers to show how I got the answer. Can someone please help me solve this one? g^2-6g-55 ___________ g
  90. Literature Opinion Please Read

    I need your opinion on something. If you are a boy please refer to a girl. If you are a girl please refer to a boy. Ok now if you are doing a play for Romeo and Juliet and you had the opposite gender would you sound like yourself or would you try to sound like a girl or boy. ...
  91. Math

    There was a surge in math club membership after the fun Halloween party. When the principal asked Mrs. Germain how many students were currently in the club, she replied, "Three times our number plus a third of our number plus a fourth of our number plus you and me is two ...
  92. English

    1. Please call me at 123-4567. 2. Please call at 123-4567. 3. Please call 123-4567. 4. Please dial me at 123-4567. 5. Please dial at 123-4567. 6. Please dial 123-4567. (Which ones are not grammatical? Which ones are grammatical? Thank you.)
  93. Mat/117 DQ1

    How do you know if a quadratic equation will have one, two, or no solutions?Please give examples. How do you find a quadratic equation if you are only given the solution? Please give an example.Is it possible to have different quadratic equations with the same solution? ...
  94. Math

    a.)If ABCD is a parallelogram, then ABCD is (always true, sometimes true, OR never true) a rectangle. b.)The diagonals of a square (always true, sometimes true, OR never true) bisect each other. c.)If WXYZ is a rectangle, then the diagonals are (always true, sometimes true, OR...

    When an object is placed 55.0cm from a certain converging lens, it forms a real image. When the object is moved to 45.0cm from the lens, the image moves 6.00 cm farther from the lens. Find the focal length of this lens? Please someone help me out I tried so many times i keep ...
  96. Math

    A truck driver estimates that a country road rises 40 cm for every 6 m along the road. What is the angle of inclination of the road? Express your answer to the nearest tenth of a degree. Can you please help sir Thnks
  97. Math

    A box has a bottom with one edge 7 times as long as the other. If the box has no top and the volume is fixed at V, what dimensions minimize the surface area? Please help me find the COMPLETE dimenssion of the box.
  98. Math

    Pharmacy has 325mL of a 40% solution. 120mL of sterile water is added to this solution to decrease the concentration. How many grams of active ingredient would be in the diluted solution?(just need to know how to set this up please)
  99. math

    As cars passed a checkpoint, the following speeds were clocked and recorded. Speed (mph): 55 62 61 54 68 72 59 61 70 what's the range? , 1st quartile and 3rd quartile? please. i know the mean is 62 and themin is 54 and the max is 72 and the 2nd quartile is 61
  100. Health

    Can you help me with this question? The determinant of total energy requirement that may most appropriately be manipulated in a weight loss program is: 1. basal matabolic rate 2. physical activity 3. dietary thermogenesis 4. body temperature Would the correct answer be #2 or #...
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