luckybee

Most popular questions and responses by luckybee
  1. algebra/functions

    a farmer has 600 meters of fencing and plans to use it to build two adjacent rectangular pens as show above. the farmer would like the total area of the two pens to be 1000 square meters. write an equation to determine the value of x? My solution is: 3X^2

    asked on June 29, 2012
  2. geometry

    a packaging company manufactures a cardboard box with a volume of 864 cubic inches. the length of the box is 24 inches, and the ends of the box are square. what is the height of the box in inches?

    asked on October 29, 2012
  3. geometry

    to estimate the number of daises in a field students toss a ball into the field and mark a circular region with a radius of 15 feet from where the ball landed. the students then counted 35 daises in the circular region. if the entire field is approximately

    asked on January 5, 2012
  4. math gre question

    in an infinite series of circles the radius of the second circle is one half the radius of the first circle and the radius of the third circle is one half the radius of the second circle. if the first circle has a radius of one inch which of the following

    asked on January 8, 2012
  5. statistics

    A sudent is analyzing data from an experiment using a linear model. when the student entered the data into his calculator and ran a least squares linear regression the calculator gave a correlation coefficient of 0.01. what can the student infer from this

    asked on January 7, 2012
  6. chemistry 2411

    A high-protein diet contains 71g of carbohydrate, 150 g of protein, and 5.0 g of fat. How many kilocalories does this diet provide? (Round the final answers to the nearest tens place.)

    asked on July 4, 2012
  7. gre math prob of a sample

    sample standard deviation = 3 sample mean = 68 n=30 what is the probability that one student selected at random from the sample will have a height within one sample standard deviation of the sample mean? a. 1.00 b. 0.73 c. 0.57 d. 0.23

    asked on January 10, 2012
  8. math working backwards

    Sandra spent one-fifth of her money and loaned one-third of the remainder to her brother. She had $24 left. How much did she begin with?

    asked on September 14, 2013
  9. algebra/functions

    Dave started his coin collection with 25 coins. the first wee he added 2 coins, the next week he added 4 coins, and the third wee he added 6 coins. If Dave continues adding coins in the same way, how many coins will he have in his collection after one year

    asked on June 29, 2012
  10. geometry

    A manufacturer wants to package samples of a product in a box with a square base. the package is to have a volume of 100 cubic centimeters. what is the func that will describe the surface area of the box S(x) in ters of the length of a side of the base, X?

    asked on June 29, 2012
  11. statistics

    A group is studying age distribution of people living in town. The mean age is 45, the modal age is 59, the median age is 56, the range is 96, and the standard deviation is 20.5. Is the data positively or negatively skewed

    asked on January 4, 2012
  12. parallell and perpendicular lines

    please check my homework given P(7,2) and the line y + 3x=7 find the equation for the line parallel line: y+3x+7 y=-3(x-7) +7 y-2=-3x+21+7 y=-3x+28+2 y=-3x+30 perpendicular line: y-2=1/3(x-7) +7 y-2=1/3x-7/3 +21/3 y-2==1/3x + 14 y=1/3x + 14 +2 y=1/3x +16

    asked on February 19, 2012
  13. math gre ques

    A sudent is analyzing data from an experiment using a linear model. when the student entered the data into his calculator and ran a least squares linear regression the calculator gave a correlation coefficient of 0.01. what can the student infer from this

    asked on January 8, 2012
  14. college problem solving 3

    an express train leaves new york at 3:00 pm and rreaches boston at 6:00 pm a slow train leaves boston at 1:30pm and arrives in new york at 6:00 pm. if both trains travel at constant speeds at what time do they meet

    asked on November 24, 2013
  15. algebra system of equations

    solve X^2 + Y^2 =70 Y= 2X + 5

    asked on December 16, 2012
  16. algebra

    a tank used to operate equipment can be filled with air in 3 hours. when the outlet valve is open, the same tank can be emptied in 5 hours. if the tank is filled with the outlet valve open approximately how long will it take to fill the tank? 71/2 hours.

    asked on June 29, 2012
  17. algebra

    what is the graph of 6X^2+6X-12>0? My solution is: an open circle over -2 going to infinite an open circle over +1 going to infinite is this correct?

    asked on June 29, 2012
  18. system of equations

    X^2 + Y^2 =70 Y = 2X + 5 MY ANSWER: -5.6, 1.6 is this correct?

    asked on June 29, 2012
  19. algebra/functions

    a quadractic function y=3x^2-6x+5 is expressed in the form (y-k)= A(x-h)^2, where the poing (h,k) is the vertex of the parobla. What are the value of h and k? (1,2) is this correct?

    asked on June 29, 2012
  20. Algebra

    A radio tower is supported by a wire fastened to the ground 60 feet away from the base of the tower. If the slope of the wire is 3/2 approximately how long is the wire

    asked on June 15, 2012
  21. function with a radical expression

    f(x)=6 fx)=20+2x^2 all under a square root symbol 6=20+2(36) 6=the square root of 92 will someone help me

    asked on February 12, 2012
  22. algebra/functions

    recent estimates indicate that the area covered by glaciers has decreased from over 25.5 km^2 in 1850 to about 16.6 km^2 in 1995. Let A=f(t) give the area t years after 2000, and assume that f(t)=16.2-0.062t. How much glacier area disappears in 15 years?

    asked on January 28, 2012
  23. math gre study ques

    a student starts with a positive number, x^6, and take the square root three times and the cube root once. this is equivalent to which of the following? a. x^1/4 b. x^4/3 c. x^3/4 d. x^4

    asked on January 8, 2012
  24. Trig

    the horizontal speed of an airplane is 183mph. the magnitude of the plane's velocity is 200mph. write an expression describing the angle the angle the plane is climbing my solution: cos-1 183/200 is this right

    asked on January 8, 2012
  25. statistics

    one of six radios in a crate is known to be defective. the radios are tested one at a time. if the first two radios are not defective, what is the probability that the third radio tested is defective.

    asked on January 6, 2012
  26. statistics

    a weather girl predicts there is a 50% chance of rain and a 10% chance that the rain will turn into snow. What is the probability that it will snow?

    asked on January 6, 2012
  27. college problem solving 2

    Me and Bill said casey can do the job for you in 10 days but give me alex instead of bill and we can get it done in 9 days. i can do better tha that said slex. let me take bill as a partner and we will do the job for you in 8 days. how long will it take

    asked on November 24, 2013
  28. Radius Question Geometry(college level)

    When you have 3 separate circles and the radius of each of those circles is 10 do i calculate like this? 2(10)+2(10)+2(10)=60 cm for my diameter

    asked on September 14, 2013
  29. chemistry 211 Lamar Univ

    Calculate the number of SO_2 molecules in 9.19 moles of SO_2

    asked on July 5, 2012
  30. logic

    a student is using a geometry program to investigate the midsegments of a triangle. the student uses the program to draw triangle ABC, bisect the sides of the triangle, and draw segments connecting the midpoints to form triangle KLM. the student then uses

    asked on June 29, 2012
  31. logic

    1+3=4=2^2 1+3+5=9=3^2 1+3+5+7=16=4^2 is this an example of inductive or deductive reasoning. I believe it is deductive because it's proven

    asked on June 29, 2012
  32. geometry

    a packaging company manufactures a cardboard box with a volume of 864 cubic inches. the length of the box is 24 inches, and the ends of the box are square. what is the height of the box in inches?

    asked on June 29, 2012
  33. algebra

    marcus rides his bicycle of 3 1/8 hour per day. what is the number of seconds that marcus spends riding his bike each day? My answer: 11,250 is this correct?

    asked on June 29, 2012
  34. precalcus will someone check my homework

    f(3)=-3/8 and (f-2)=-12 MY SOLUTION F(-2)=ab^-2 = -12 F( 3)=ab^ 3 = -3/8 b^5 = 12 * 3/8 = 32 b=2 12 = a(2)^2 12 = 4a a =3 f(x)=3(2)^x

    asked on March 3, 2012
  35. algebra

    give the general formulas for the integer solutions of x^2 + y^2 = z^2. what is x,y, and z when m=18 and n=11

    asked on February 6, 2012
  36. algebra equation

    give the general formulas for the integer solutions of x^2 + y^2 = z^2. what is x,y, and z when me=18 and n=11

    asked on February 5, 2012
  37. statistics

    a point is randomly selected within the rectangle with vertices at (2,0), (2,2), (-4,2), and (4,0). What is the probability that the point's x-coordinate and y-coordinate are both positive?

    asked on January 4, 2012
  38. algebra 2

    complete the square 2x^2-4x-1=0

    asked on January 22, 2014
  39. physics

    if a teacher wanted to demonstrate mass in the classroom, which of the following objects should she use? a ruler or an eraser

    asked on November 26, 2013
  40. algebra

    how do you solve this equation d/3t + d/4.5(t+1.5) = d

    asked on November 26, 2013
  41. college problem solving

    a certain two-digit number is 6 less than the sum of its tens digit and 7 times its units digit. if the digits are reversed the number is increase by 27. fin the original two-digit numbers

    asked on November 24, 2013
  42. calculating range

    calculating the range of 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 Is the range 16-0 =16

    asked on April 4, 2013
  43. closure propery

    Is this set closed under multiplication {-1, 0, 1}

    asked on April 4, 2013
  44. logic

    conjecture 17 if A, B, and C are sets, then (A\B)U C = A\(BUC)

    asked on November 3, 2012
  45. trig

    using a right triangle with one angle 24 degrees and the opposite side being 57 feet, write an expression to fine the hypotenuse, X? X=57/sin(24) is this correct?

    asked on June 29, 2012
  46. probability

    a student rolls three standard six-sided dice. what is the probability that the sum of the numbers that come up will be 18? is the answer 1/216

    asked on June 29, 2012
  47. trig

    a circular chimney pipe with an 8-inch diameter passes vertically from a heater through a metal plate in the roof. the plate has an elliptical hole that measures 8 inches along one axis. if the roof is slanted at an angel of 40 degrees with the horizontal,

    asked on June 29, 2012
  48. trig

    the horizontal speed of an airplane is 173 miles per hour. the magnitude of the planes velocity is 200 miles per hour. what angle is the plane climbing? My answer is Cos-1 173/200. is this correct

    asked on June 29, 2012
  49. pre-calculus

    PD= 600(0.978)^t PD is decreasing at 2.2% per year. How did they get 2.2%

    asked on March 16, 2012
  50. algebra

    V=h[( (a+b)/2)^2 + 1/3( (a-b)/2)^2] showing all steps that it reduces to following: v=h/3(a^2 +ab+b^2)

    asked on February 6, 2012
  51. algebra eqution

    V=h[( (a+b)/2)^2 + 1/3( (a-b)/2)^2] showing all steps that it reduces to following: v=h/3(a^2 +ab+b^2)

    asked on February 5, 2012
  52. algebra/functions

    If F is a decreasing function what can you say about F(-2) compared to F(2)?

    asked on January 25, 2012
  53. algebra/functions

    If G is an increasing function. what can you say about G(3) - G(-1)?

    asked on January 25, 2012
  54. stat counting principles

    telephone numbers for a certain city have exchanges of 584, 545, or 586. each of these exchanges is followed by four digits. how many different telephone numbers are possible for this city? a. 3 * 4 b. 3 * 4 * 10 c. 3 * 10^4 d. 3 * 4^10

    asked on January 8, 2012
  55. alg application

    two cars leave the station at 9:00 am. the first car head due south at an avg speed of 54mph. the second car heads due west at an avg speed of 72mph. how far apart will the cars be at 1:00pm? my solution: 360mi is this correct

    asked on January 8, 2012
  56. re-post statistics

    a weather girl predicts there is a 50% chance of rain and a 10% chance that the rain will turn into snow. What is the probability that it will snow? statistics - Ms. Sue, Friday, January 6, 2012 at 9:08pm What on earth is a "weather girl?" That's what the

    asked on January 7, 2012
  57. statistics

    how many different license plates can be made consisting of three letters by four digits?

    asked on January 4, 2012
  58. statistics

    a computer system requires all users to log on using a 6 character password. if each character can be either a digit from 0 to 9 or a letter of the alphabet, what is the number of possible passwords. please show formula used

    asked on January 4, 2012
  1. math working backwards

    I understand thank you.

    posted on September 15, 2013
  2. math working backwards

    When working backwards we first need to deal with 1/3. so since it says 1/3 of the remainder, does this mean to divide 24 by 1/3

    posted on September 14, 2013
  3. Radius Question Geometry(college level)

    I solved it. the length of segment CD with by 20 cm. Thank you

    posted on September 14, 2013
  4. Radius Question Geometry(college level)

    There are 3 separate circles, there is a chord drawn through the center of each circle, the point of tangency is on the third circle. So i drew a line perpendicular from the radius of 10 in the third circle to the point of tangency. This is the entire

    posted on September 14, 2013
  5. gre math prob of a sample

    There is a picture of a histogram. the numbers on the x-axis are: 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, and 76. the numbers on the t-axis are: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. there are additional symbols: sigma x =2100, sigma x^2=142540,

    posted on January 11, 2012
  6. statistics

    I thought order matters in this problem because it says 3 letters then 4 digits. So should nPr be used? 26P3= 15600 10P4 = 5040 (5040)(15600)= 78624000

    posted on January 5, 2012