Math grd12

4,596 results, page 28
  1. Math

    We are currently studying "earning money" for math. I read this sentence: When a store claculates its profit as a percentage of its cost price the profit is always bigger than the profit calculated as a percentage of the selling price. What does it mean
  2. Math (integrals) (Substitution)

    I am given an integral to solve with given substitution values. I got an answer, but I'm not quite sure if it's correct as an online integral calculator gave a different answer. ∫ x sqrt(4-x) dx Given that u = 4-x . In this case, x = 4 - u du = -dx Now..
  3. math

    Find the representation of the number 256 in the following bases: a. base six b. base twelve c. base two I get how to write the number of objects as a base(whatever), but I think this is asking me to start from the end number and work backwards. I really
  4. math

    alan scored a total of 14 points for answering all 15 questions on a math quiz for every correctly answered question alan got 2 points for every wrong ahe lost 2 points how many questions did he answer correclty
  5. math

    alan scored a total of 14 points for answering all 15 questions on a math quiz for every correctly answered question alan got 2 points for every wrong ahe lost 2 points how many questions did he answer correclty
  6. ALGEBRA 1

    In a certain math course, a student needs between 720 and 810 points in order to get a B. The final exam is worth 200 points. If Cathy has 582 points just before the finals, what range of scores on the final exam will give her a B for the course?
  7. math,correction&help

    Is this right:if it still needs more can someone help me out what else can i say....thanks why are polynomials important? polynomials are important because the are used to determine and solve the unknowns in equations. Many natural processes can be modeled
  8. Calculus

    Math questions, please help me? :(? Find the composite functions f o g and g o f for the given functions. f(x) = 10^x and g(x) = log x State the domain and range for each: f(x) = 4x + 1 and g(x) = x^2 f(x) = sin x and g(x) = x^2 - x + 1 f(x) = 10^x and
  9. statistics

    a simple random smaple of 55 mathematics teachers were timed as they completed sudoku puzzles. Their mean completion time was 20.3 minutes. The population standard deviation is assumed to be 12 mintues and times vary normally. Find 99% confidence interval
  10. Math (not specific knowledge, just research)

    For math class, we are planning an indoor carnival. We need to figure out the size of each exhibit and vendor, and make sure all of them fit into the space. We can choose any large indoor space we can think of. I did some research online and chose the
  11. High School Math

    I'm helping my little sister in her math homework. I just got stuck in this problem. Can anyone please help us out. I'm guessing it's letter C. Am I correct? A small company borrows $50,000 at 11% compounded monthly. The loan is due in 4 years. How much
  12. algebra

    Suppose that these 15 measurements are respectively labeled x1,x2,..,x15. (Thus,-27 is labeled x1,62 is labeled x2,and so on.) Find. 15 over the sum sign and i=1 under the sum sign(x1 + 43) I ahve no idea how to solve this becaue I never seen this type of
  13. MATH HELP

    shelley spent 17 min washing the dishes. she spent 38 min cleaning her room. explain how you can use mental math to find how long shelley spent on the two tasks?
  14. Is this right Ms Sue ???

    Using NOT when searching allows you to ______? search for subtraction math games eliminate unwanted topics to narrow down for search *** search for more than one topic narrow down your topic by combining words
  15. Algebra

    For questions 1-5 solve the equation. 1.-2v-7=23 (A)15 (B)8 ★ (C)-8 (D)-15 2. X/3-10=-12 (A)-6 (B)-66 (C)6 (D)66★ 3. d/3+10=7 (A)51 (B)20 ★ (C)0 (D)-9 4. 2(2-2x)=-3x (A)-4 (B)4 ★ (C)6 (D)0 5. 2.9n+1.7=3.5+2.3n (A)3 (B)-3 (C).3 (D)1 For questions
  16. please check my answers Ms Sue!!!

    Using NOT when searching allows you to ______? search for subtraction math games eliminate unwanted topics to narrow down for search search for more than one topic narrow down your topic by combining words**
  17. math mental math

    shelley spent 17 min washing the dishes. she spent 38 min cleaning her room. explain how you can use mental math to find how long shelley spent on the two tasks?
  18. Calc.

    Let h(x)=16-4x-(x^3) Find g(96). My work: 96= 16-4x-(x^3) (-x^3)-4x-80=0 Using the rational roots theorm, I found that x=-4 so h(-4)=96, therefore g(96)=-4. Find g'(96). My work: g'(96)= 1/(dh/dx at x=-4) 1/((-3(-4)^2)-4)= -1/52 Does this look ok? Also, my
  19. Math

    Capacity Homework? I was doing my grade 8 math homework on capacity, and I was told to order the capacity of Vase A, B, and C from least to greatest. Vase C is a hourglass based prism, and I don't know the formula for it. Please help?
  20. please help Ms Sue !!!!

    Using NOT when searching allows you to ______? search for subtraction math games eliminate unwanted topics to narrow down for search search for more than one topic narrow down your topic by combining words
  21. Re: Physics/Math

    A 3.0 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 18 N at an angle = 45° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25. (Assume the positive direction is to the
  22. Math

    A student wrote this statement: "A triangular prism has a height of 15 inches and a base area of 20 square inches. The volume of the prism is 300 square inches." Identify and correct the error. I am not sure because I am new at doing this kind of math.
  23. art

    this image was created by using basic math concepts that include all of the following except A)knowing how to create a pattern B)using understanding the angles of the shapes C) a basic understanding of different geometric shapes. D) applying appropriate
  24. math

    Fewer than 107 girls attend a basketball camp. A total of 180 children attend at the camp. Which inequality can be used to find the number of boys n tha might have attended the basketball camp? math problem
  25. Math

    Math Problem: Find the area of a circle that has a radius of 14 feet. Round your answer to the nearest hundredth. Would someone please check the way I worked this and let me know if I did it correct or not? Thank You A=3.14 (14ft)2 A=3.14 (196) A=615.44 Im
  26. Art Help!

    How is this artistic creation an example of a combination of art and science? It is a picture of an oragomi shrimp made out of brown paper with black eyes. A. It is a creative sculpture of a shrimp. B. It is not anatomically correct. C. It is made with
  27. math

    The city council has decided to add a 0.3% tax on motel and hotel rooms. If a traveler spends the night in a motel room that costs $55 before taxes, how much will the city receive in taxes from him? I am studying for a exam, would you also know a good
  28. math

    On a T.v. game show a contestant is asked to select a door and then is rewarded with the prize behind the door selected. If the doors can be selected with equal probability what is the expected value of the selection if the three doors behind them have
  29. curriculum development project

    My topic is community and I have to form a paragraph from the 10 activity plans such as math, science literacy, dramatic play, language and literature, puppets, music and movement, sensory centers, art, science and social studies. the paragraph consist of
  30. Math

    John has 4 math books, 6 biology books,, and 8 statistics books to arrange on a shelf. In how many ways can he arrange the books so that books on the same subject are grouped together?
  31. English

    1. He won first place in the math contest. 2. He got first place in the speech contest. 3. He received first place in the science contest. (Are they all grammatical? Can we use all the verbs?)
  32. math

    i don't understand standard form math and i have to questions what is nine hundredths in standard form and sixteen and six tenths in standard form?
  33. statistics

    Answer the question(s) based on the following situation: 150 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with center ì = 65 and standard deviation ó = 10.The third quartile of the scores
  34. Math(Unit Rate)

    If 20 units= 10kg whats the unit rate? http://www.eduplace.com/math/mathsteps/6/e/ is that your gf? "sam"???? 20/10 reduce,= 2/1 divide,=.5 Kg/unit calculate the unit rate what dose this mean Find each unit rate. $112 in 8 hours
  35. Math

    Shelly is working 250 math problems and she wants to finish in 6 days. If she works the same number of problems each day for 5 days how many problems will she have left to work on day 6?
  36. math

    the mass of 3 dictionaries and 2 textbook is 8 kg and the mass of 3 dictionaries and 3 textbook is 9 kg. find the mass of 5 textbooks? math - Steve, Monday, September 19, 2016 at 5:17am 3d+2t = 8 3d+3t = 9 clearly, t=1 i cant understand it
  37. Math

    My math teacher said to use the FOIL (First Outer Inner Last) property to simplify these quadratic equations I have made from looking at two parabolas. Here are my equations & how would you use the FOIL property on each of the equations and also can
  38. math,algebra

    why are function notations important, are they really that important in todays world. Why do make math difficult. what are function notations i don't understand why they are important. 1934.3847569
  39. math

    I need a formula. At a math contest,12 problems were given. Five points were awarded for each correct answer, and two points were deducted for each incorrect answer. Matt's score was 39. How many correct answer did he have
  40. 9th grade math

    Hey i need help on my math hw i just don't get it lol please help me! Here the questions Which of the following equations has a graph that is parallel to the graph of 4x-2y=7? A:-2y = 4x+2 B:7-4x=2y C:4x+2y=2 D:-4x-2y=-7 E:2y=4x+7 Determine if the two
  41. Math

    Hey i need help on my math hw i just don't get it lol please help me! Here the questions Which of the following equations has a graph that is parallel to the graph of 4x-2y=7? A:-2y = 4x+2 B:7-4x=2y C:4x+2y=2 D:-4x-2y=-7 E:2y=4x+7 Determine if the two
  42. math and desperate

    What similarities and differences are there between functions and linear equations? Are all linear equations functions? Is their an instance when a linear equation is not a function support your answer. Im not good at math please help.
  43. Math

    1. What type of graph does not show the number of times a response was given? (1 point) box-and-whisker plot line plot stem-and-leaf plot bar graph 2. Which of the following types of information is suited for display on a scatter plot? (1 point)
  44. Geometry: Right Triangles

    In my math homework, it is asking me to find the height of a triangle. Does anyone know how to find the height of a triangle? If you could, could someone give me an example problem? Thanks a lot!
  45. adult education

    Math If the line passing through the points (1,a) and (4,-2)is parallel to the line passing through the points (2,8) and (-7,a + 4), What is the value of a ? Please help, I don't understand how to set this one up.
  46. 4 grade math

    i have a question on a math problem, please#1 explain why 7*8 is not a number sentence. Next question is write two true number sentence. thank you!
  47. math

    If a single letter is drawn from the set( matheics) what is the probability that the letter drawn is a member of the set (math)
  48. math

    a student earned a grade of 80% on a math test that had 20 problems. How many problems on this test did the student answer correctly?
  49. math

    my math homework tells me to find the area of a circle using it's circumference. the circumference given was. can someone explain to me how to find the area?
  50. algebra

    A math class has a total of 47 students. the number of females is 17 less than the numberof males. how many males and how many females are in class?
  51. English

    I just want to see if these are correct. Orig.1.He was sad to leave. (superlative) S/B 1. He was saddened to leave. Orig. 2. She ran as fast as the others on the team (comparative) S/B 2. She ran faster than the others ran on the team Orig. 3. Throughout
  52. Math

    Math help??? 1.) 13 1/3 divided by 6 2/9 2.) 15 * 4 2/3 3.) 10 2/3 divided by 4
  53. Math

    Math help??? 1.) 13 1/3 divided by 6 2/9 2.) 15 * 4 2/3 3.) 10 2/3 divided by 4
  54. algebra 1 help

    fin the complement and the supplemnt of the angel measure 1) 130 complement-40 suplement-50 or vice versa if anyone can help me with some algebra work it would be greatly appreciated i am im algebra 1 and still on the second quarter and have until november
  55. Math

    Posted by Lance on Friday, April 27, 2007 at 9:47pm in response to math. please give us one set of numbers so we can work an example for you. What was the percentage increase in motor vehicle production in countries outside the United States from 1950 –
  56. social studies

    Why should the 3 R's be rehabilitated? Thank you for using the Jiskha Homework Help Forum. If, by the 3 R's, you mean "Reading, Riting, Rithmetic" you would be illiterate without them. Aside from their being so much enjoyment in reading, what would happen
  57. Physics

    I have to make up my own standardized questions for a project, and I wanted to make sure I did my math right. Can someone please check it? Thanks!! If your mass was 60 kg, the earth’s mass was 6×10^24 kg, the radius of the earth was 6.4×10^6 meters,
  58. Math

    Eli's Dad made him a birthday cake, but forgot to buy candles. He could only find a few. But Eli was smart in math, so his Dad said "The ratio of candles to years is 3 to 5" That gave him the right number. How old was Eli? I am very confused on how to even
  59. Geometry

    A satellite in a nearly circular orbit is 2000 km above Earth's surface. The radius of Earth is approximately 6400 km. If the satellite completes its orbit in 112 hours, calculate the speed of the satellite in kilometers per hour. Please help me. I have a
  60. English

    A: (Are) (you) (doing) your homework? [3 points] B: Yes, I am. I'm doing math homework. 1. (You) (are) (doing) your homework? =========================== There are three blanks in the first sentence. Students are asked to fill in the blanks with suitable
  61. math test

    Hi! I have a math test coming up tomorrow, and I need to prepare. but,i don't know how I should. . . any help would be great. she told us to: Be prepared to identify and explain functions, linear functions and proportional functions. Be prepared to use the
  62. Math

    Hi, would someone mind just checking the answer I got for this formula and tell me if I'm on the right track or not. Question... x+y=21 3x=4y Answer I got... x=84 y= -63 I didn't get that. Check your math. I found 7y=63 but not y = 63. You can always check
  63. math

    I suggest you Google each of these people. You can search for the name bio Or you can search for the name height weight. for math i have to do a graph of some sort, so i chose to do a graph of famous ppls heights and weights, so i was wondering do you know
  64. Math help

    here's the question Dear Dr. Math, I wanted tto find the area of this hexagon. I few the apothem as I've shown. Then I measured the apothem and perimeter. I used the formula a=1/2ap and got 3.2cm^2 for the area but that seems way too small for me. I think
  65. math

    solve the compound inequalities as demostrated being careful of how a negative x- term is handled in the solving process show all math work arriving at the solutions display a simple line qraph for each solution set as demostrated. -119 (your or Copmound
  66. Math

    Consider the weighted voting system [75: 31, 29, 23, 16, 8, 7]. Find each: a. The total number of players b. The total number of votes c. The weight of P3 d. The minimum percentage of the votes needed to pass a motion 9rounded to the next whole percent)
  67. Math

    Math - Cindy, Tuesday, April 29, 2014 at 8:44pm At Bobs diner, it costs $8.00 to purchase two hamburgers and one order of fries. The "family pack" costs 30.00 and comes with six hamburgers and six orders of fries. If the prices are constant,how much does
  68. Calculus - Integrals

    I know I've probably flooded the site or something (Sorry if I have), it's just that these problems aren't similar to anything I've reviewed in class. I've got two more questions, then maybe 1 or 2 more coming. That's all I can see in the future, anyhow.
  69. SAT

    is there any helpful practice sat tests online other than the college board? i'm taking the test this saturday and i don't feel like i'm ready for it. i have studied the SAT prep book that i have, as much as i can. i especially need help in the math and
  70. math

    If a man drove 3.5 miles to a gas station and on the way home drove 2 times that +.7 miles,how many miles did he drive?? 3.5 + 2 times 3.5 + .7 = what Do the math. 17.5 omg ur so smart...
  71. Math

    On a math test,12 students earned an A. This number is exactly 25% of the total number of students in the class. How many students are in the class? 'In this problem I'm not sure whether I'm being asked to solve for one or two unknowns. May I have your
  72. math

    The mean score on a Math exam was 50% and the standard deviation was 10%. Assume the results were normally distributed. (a) What percent of students earned a score between 50% and 70%? (b) If 60 students took the exam, how many got a score between 50% and
  73. Math

    math A particle A is projected vertically upwards from a point O on horizontal ground with speed 20ms. At the same instant a particle B is released from rest at point P which is 30 m above the ground. The point P Is not directly above O ignore air
  74. Math percentage

    I don't really understand percentages grade 6 math. 1.60% discount on a 7$ item so items price is 40% of original so 0.4 x 7= 2.8$? 2. A population of 1500 people increases 15% each year how would this question be done? 1500 x .15=225 so the next years
  75. phys

    The speed of ocean waves depends on their wavelength λ (in meters) and the gravitational field strength g (in m/sˆ2) in this way: V=Kλˆp Gˆq Where K is a dimentionless constant. Find the value of the exponents p and q. Consider the
  76. algebra

    please help me for this problem.im not good in math.the challenge involves in dealing with the owner is to use a 20 meter fencing material to build a pig pen so that the owner will not be buying any additional materials considering also that one side of
  77. algebra 2

    solve: 3+2(1-x)>6 i got -11/2 no Here is what I got: 3+2(1-x)>6 3 + 2 - 2x > 6 -2x > 1 x < -1/2 what about the 3+2? i have to graph the solution set on a number line. What about the 3+2 ???? What a strange question re this problem What level of math are
  78. Math check my answers

    1. Evaluate. 8d - 10 for d = 4 A.32 B.22*** C.26 D.46 2. write an algebraic expression for the sum of 3 coins and c coins. A.c + 3*** B.c/3 C.3c D.c-3 3. Find the solution of the equation from the given numbers. x - 2 =16: 14, 18, 21, or 12 A.12 B.14
  79. Math

    What is meant by the terms vertical and horizontal asymptotes Here is a nice graph with vertical and horizontal asymptotes. THe dotted lines are the asymptotes. http://www.mathnstuff.com/math/spoken/here/2class/300/fx/library/234/n1oxp4.gif
  80. Math -_-

    For all x in the domain of the function x+1 over x^3x this function is equivalent to \[a)\frac{1}{x^2}-\frac{1}{x^3}\\ b)\frac{1}{x^3}-\frac{1}{x}\\ c)\frac{1}{x^2-1}\\ d)\frac{1}{x^2-x}\\ e) \frac{1}{x^3}\] This is one of the questions to my math test can
  81. word problem, please

    Joe has scored 84, 89, and 90 on his first three exams in his math class. If the standard 70,80,90 scale is used for grades and the exams are equally weighted, what must he score on the final exam, f, in order to a) Get a C average on exams? f b) Get a B
  82. Math...Algebra :S

    Hi, okay um. I'm trying to get his math question (Algebra :o) and i'm not quite sure what i'm doing---but everything i do, i get the wrong answer. The Question is 2m+n M= 2/5 and n= 1/2 (Fractions) Everytime i do the question, i get 9/10 as a answer...but
  83. word problem, Im lost on how to set this up

    Joe has scored 84, 89, and 90 on his first three exams in his math class. If the standard 70,80,90 scale is used for grades and the exams are equally weighted, what must he score on the final exam, f, in order to a) Get a C average on exams? f b) Get a B
  84. math

    4th grade math homework. rounding sums and differences. paper say "round each number to its highest place. then estimate the sum or difference." example says 92 +28= then says round to 90 and 30 to make 120. further down numbers get larger 12646 + 9103= do
  85. english

    I wrote this for my class and I just want to make sure I have it right. The role of education plays a very big part in the financial world. It's a big part of becoming successful. It can help with learning basic math skills in order to better your
  86. Radicals and Trig.

    I am catching up over summer on math units that I have to rewrite. In my textbook it asks me to find the base of two triangles and add them together. the smallest angle of the larger triangle is 30 degrees. The opposite side to the angle is 40cm. it gives
  87. Math

    How do I get the common multiple of 12, 20, and 35? I am not sure I understand the process. I have 18 toy vans I give7 to lexiev. and 2 to kaitlynne how many do I stil have The common multiple is the number that can be divided evenly by all three numbers.
  88. math

    Good day to you. How can I approach this math problem. "To save for a child's education, the Petersens deposited $2500 into an account that pays 6% annual interest compounded daily. Find the amount of interest earned on this account over a 20-year period".
  89. math

    on her first two math tests, Gracie has an average score of 86. If she got a score of 92 on the first test, what is her score on the second test?
  90. accounting

    home / study / math / other math / questions and answers / the following tabulation gives earnings per share ... Question: The following tabulation gives earnings per share ... The following tabulation gives earnings per share figures for theFoust Company
  91. Math

    Checking my son's homework and want to see if he figured this out correctly .. i am too old to be revisiting this math ... Here is the question ... The perimeter of a rectangle patio is six times the length of the shorter side. If the shorter side is 8
  92. Science

    I have some homework questions that i am having problems finding. Please help! 1. What is the value of math to science? 2. What is the value of using graphs to represent data? 3. How do units give numbers meaning and help verify correct formulas? 4. Why
  93. math

    Assume the average height and weight of a female in your math class is 5'5" and 140 pounds. Use this information to write a variation equation then use it to find the weight of the female below if they had the same body type as the average female. Round
  94. chmistry

    Compound: Concentration: Measured deltaT LiCl 6.00 g/kg 0.492 deg C HCl 4.00 g/kg 0.389 deg C NaCl 6.00 g/kg 0.356 deg C Determine the value of the vant hoff factor for each salt for the experimentally measured delta T value. (kf=1.86) I have tried to
  95. Physics

    When a butterfly lands 12 cm from a concave mirror, it's image is 18 cm behind the mirror. Find the focal length 1/f=(1/do)-(1/di) 1/f=(1/12)-(1/18) 1/f=0.0833-0.0555 1/f=0.0277 f=36 I'm pretty confident w/ my math but as I understood, it's do-di if it's
  96. Math

    Hi. This is my question: An art student wants to make a string collage by connecting six equally spaced points on the circumference of a circle to its center with string. What would be the radian measure of the angle between two adjacent pieces of string,
  97. 10th grade Math B

    Hi. This is my question: An art student wants to make a string collage by connecting six equally spaced points on the circumference of a circle to its center with string. What would be the radian measure of the angle between two adjacent pieces of string,
  98. Math(Please respond)

    .50 - x / x = 3.20e-1 I need to solve for x. I was going to do .50 X 3.20e-1 and then take the square root but this is not correct. I am not sure what to do. Thank you for your help. Math(Please help) - Reiny, Tuesday, April 17, 2012 at 3:18pm You probably
  99. math

    Use symbolic Math symbolic representation: 1. You observe that oen fox eats 100 rabbits each year. You have the idea that every increase of one int eh fox population will cause the rabbit population to decrease by 100.
  100. Math

    Sarah was trying to figure out her grades for her math course. She only knew the grade of 4 of the tests she had taken, however the class had taken 5 tests total. She scored a 94, 67, 83, and 93. If Sarah ended up with a grade of 90, what did she get on

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