luckybee
Most popular questions and responses by luckybee
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 
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 
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 
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 
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 
chemistry 2411
A highprotein 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 
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 
math working backwards
Sandra spent onefifth of her money and loaned onethird of the remainder to her brother. She had $24 left. How much did she begin with?
asked on September 14, 2013 
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 
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 
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 
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(x7) +7 y2=3x+21+7 y=3x+28+2 y=3x+30 perpendicular line: y2=1/3(x7) +7 y2=1/3x7/3 +21/3 y2==1/3x + 14 y=1/3x + 14 +2 y=1/3x +16
asked on February 19, 2012 
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 
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 
algebra system of equations
solve X^2 + Y^2 =70 Y= 2X + 5
asked on December 16, 2012 
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 
algebra
what is the graph of 6X^2+6X12>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 
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 
algebra/functions
a quadractic function y=3x^26x+5 is expressed in the form (yk)= A(xh)^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 
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 
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 
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)=16.20.062t. How much glacier area disappears in 15 years?
asked on January 28, 2012 
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 
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: cos1 183/200 is this right
asked on January 8, 2012 
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 
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 
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 
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 
chemistry 211 Lamar Univ
Calculate the number of SO_2 molecules in 9.19 moles of SO_2
asked on July 5, 2012 
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 
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 
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 
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 
precalcus will someone check my homework
f(3)=3/8 and (f2)=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 
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 
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 
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 xcoordinate and ycoordinate are both positive?
asked on January 4, 2012 
algebra 2
complete the square 2x^24x1=0
asked on January 22, 2014 
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 
algebra
how do you solve this equation d/3t + d/4.5(t+1.5) = d
asked on November 26, 2013 
college problem solving
a certain twodigit 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 twodigit numbers
asked on November 24, 2013 
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 160 =16
asked on April 4, 2013 
closure propery
Is this set closed under multiplication {1, 0, 1}
asked on April 4, 2013 
logic
conjecture 17 if A, B, and C are sets, then (A\B)U C = A\(BUC)
asked on November 3, 2012 
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 
probability
a student rolls three standard sixsided 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 
trig
a circular chimney pipe with an 8inch 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 
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 Cos1 173/200. is this correct
asked on June 29, 2012 
precalculus
PD= 600(0.978)^t PD is decreasing at 2.2% per year. How did they get 2.2%
asked on March 16, 2012 
algebra
V=h[( (a+b)/2)^2 + 1/3( (ab)/2)^2] showing all steps that it reduces to following: v=h/3(a^2 +ab+b^2)
asked on February 6, 2012 
algebra eqution
V=h[( (a+b)/2)^2 + 1/3( (ab)/2)^2] showing all steps that it reduces to following: v=h/3(a^2 +ab+b^2)
asked on February 5, 2012 
algebra/functions
If F is a decreasing function what can you say about F(2) compared to F(2)?
asked on January 25, 2012 
algebra/functions
If G is an increasing function. what can you say about G(3)  G(1)?
asked on January 25, 2012 
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 
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 
repost 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 
statistics
how many different license plates can be made consisting of three letters by four digits?
asked on January 4, 2012 
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

math working backwards
I understand thank you.
posted on September 15, 2013 
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 
Radius Question Geometry(college level)
I solved it. the length of segment CD with by 20 cm. Thank you
posted on September 14, 2013 
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 
gre math prob of a sample
There is a picture of a histogram. the numbers on the xaxis are: 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, and 76. the numbers on the taxis 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 
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