Friday
December 2, 2016

# Posts by christina

Total # Posts: 917

math
I am thinking of a two-digit number in which the sum of the digits is 9 and the number is even. These clues alone do not create one answer. Add one more clue so that there is only one answer. Both digits are divisible by 2. The difference of the digits is 2. Both digits are ...
October 26, 2012

math
A manufacturer sells widgets, each of which is packaged in a box whose dimensions are 8 centimeters by 8 centimeters by 8 centimeters. Design the dimensions of a box to ship widgets. Your box must hold at least 1000 widgets. (Enter your answer in the form length, width, height...
October 26, 2012

math
Suppose the U.S. federal debt was \$9,400,000,000,000. Let's say that the decision was made to reduce the debt by \$10 million per day. How long would it take to pay off the debt at this rate? (Round your answer to the nearest year.)
October 10, 2012

math
In order to make the most accurate calendar, the following system was devised. Leap years occur every 4 years except for years ending in 00, but years divisible by 400 are leap years. In this case, the year is a leap year if it is divisible by 400. Which of the following years...
October 10, 2012

math
This problem from China is almost 2000 years old: Find a number that when divided by 3 gives a remainder of 1, when divided by 5 gives a remainder of 4, and when divided by 7 gives a remainder of 2.
October 9, 2012

math
When items in a box are put in groups of 3 or 5 or 6, there is always 1 item left over. How many items are in the box if there are fewer than 50?
October 9, 2012

chemistry
A STUDENT STUDYING THE FE+3- HSCN equilibrium put into a test tube 10.00ml of 2.00 x 10-3 M Fe(NO3)3 with 10.0 mL of 2.00 x 10-3 M HSCN.THE H+ in the resulting solution was manteined at 0.500.By spectrophotometric analysis of the equilibrium solution, the equilibrium ...
September 29, 2012

Sociology
Discuss the conclusions of Margaret Mead concerning temperament, and explain how she arrived at her conclusions.
September 27, 2012

physics
You pull a 18 kg sled across the floor with a strap that is at an angle of 40° above the horizontal with a force 86 N. Find the magnitude of the acceleration of the sled, given that the coefficient of kinetic friction between the sled and the floor is 0.23.
September 22, 2012

Why are files reduce in an organisation?
September 22, 2012

Physics
A dolphin wants to swim directly back to its home bay, which is 0.85 km due west. It can swim at a speed of 4.30 m/s relative to the water, but a uniform water current flows with speed 2.83 m/s in the southeast direction. (a) What direction should the dolphin head? (b) How ...
September 13, 2012

physics
Sheena can row a boat at 2.90 mi/h in still water. She needs to cross a river that is 1.22 mi wide with a current flowing at 1.55 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head 60.0° upstream. (a) What is her speed with ...
September 13, 2012

Calculus
limit as x-->4- (from the left) of (3[[x]]-5) [[absolute value.]]
September 10, 2012

Calculus
find the limit(if it exists), if not explain why. lim x--> 4- (3[[x]]-5)
September 10, 2012

world geography
Where on Earth? which of the 12 northern eurasian cities will be the home of your company's newest restaurant? hint: use information from an atlas and al almanac to eliminate all but one city
September 7, 2012

vocab
What is a compound sentence for abnegation?
September 3, 2012

World Geogrpahy
what does the cartogram tell you about japan?
August 31, 2012

Physics
A school bus takes 0.92 h to reach the school from your house. If the average velocity of the bus is 18.3 km/h to the east, what is the displacement?
August 28, 2012

algebra
Solve. (x-4)=18
August 24, 2012

algebra
Solve by using the square root property. (x+7)^2=-11
August 24, 2012

Algebra 1
what are the length and width of a rectangle if the area is 13.5 square units and the length of one side is .5 the measure of the perimeter?
August 22, 2012

Math
I posted this question before but accidentally typed in the wrong values! Please help, I just need to know the basic formula my book didn't provide any examples. For the function y = -2sin(x-(pi/3)) between x = 0 and x = 2pi : (6 marks) For what value(s) of x does y have ...
August 14, 2012

algebra
A motel clerk counts his \$1 and \$10 bills at the end of the day. He finds that hes has total of 64 bills having combined monetary value of \$217. Find the number of each denomination that he has.
August 14, 2012

algebra
It would cost \$79.59 to buy three tickets in Japan plus two tickets in Switzerland. Three tickets in Switzerland plus two tickets in Japan would cost \$75.31. How much does an average movie ticket cost in each of these countries?
August 13, 2012

algebra
A store mixes Brazilian coffee worth \$11 per kilogram and Venezuelan coffee worth \$15 per kilogram. The mixture is to sell for \$14 per kilogram. Find how much of each is needed to to make a 216-kilogram mixture. Brazilian coffee needed- Venezuelan coffee needed-
August 13, 2012

algebra
Solve by using the elimination method. 9x-y=72 x+4y=45
August 13, 2012

algebra
Solve by using the elimination method. 7x-8y=-20 8x+7y=74
August 13, 2012

algebra
Solve by using the elimination method. 2x=2+4y -3/2x+y=-31/2
August 13, 2012

algebra
What are the coordinates for each equation. 3x-2y=-18 -3x-y=0
August 13, 2012

algebra
Solve by the substitution method. 2x+7y=16 x=22-7y
August 13, 2012

algebra
Solve the system of equations by graphing. -3x-2y=18 3x-y=0
August 12, 2012

algebra
Solve by the elimination method. 2x-7y=-36 7x+2y=33
August 12, 2012

trig
Construct the equations of the following trigonometric functions: A)A sine function with amplitude 2, period , phase shift /3 right B)A tangent function with a reflection in the y-axis, period ¾, translation up 5 units C)A cosine function with period 270°, ...
August 12, 2012

trig
For the function -2sin(x-(pi/3)) between x = 0 and x = 2 : (6 marks) For what value(s) of x does y have its maximum value? For what value(s) of x does y have its minimum value? For what value(s) of x does y=1?
August 12, 2012

Math
What is the maximum number of nonoverlapping squares with sides of length 3 that will fit inside of a square with sides of length 6?
August 10, 2012

algebra
parking in a student lot cost \$1 for the first half hour and \$1.75 for each hour thereafter. A partial hour is charged the same as a full hour. What is the longest time that a student can park in this lot for \$9 what is the answer
July 28, 2012

algebra
Complete the factoring. 3x^3+9x^2+6x
July 25, 2012

algebra
Calculate. 7[6+(8)^3]
July 25, 2012

algebra
Factor by grouping. 7z^2+21z-az-3a
July 25, 2012

algebra
Factor by grouping. 20s^3+65s^2-60s
July 24, 2012

algebra
Factor the trinomial. 5c^c-70c+200
July 24, 2012

algebra
Factor. 125r^2-245
July 24, 2012

CJS/230
Why don't you do your own homework without using someone else to do it for you?
July 23, 2012

math
6x+4(70-x)=300
June 24, 2012

algebra
6x+4(70-x)=300
June 24, 2012

Physics question
1.) If the curling stone was initially sliding at 2.97 m/s and stopped precisely 10.8 meters from its launch point, then the coefficient of friction (the ratio between the magnitude of the frictional force and the magnitude of the normal force) was? 3.) Two curling contestants...
June 21, 2012

physics
Forces of 86 N east, 23 N north, 46 N south, 55 N west are simultaneously applied to a box of mass 13.8 kg. Find the magnitude of the box's acceleration?
June 18, 2012

Physics :)
John and Joan walk in opposite directions around a circular path, starting from the same point. The path has a radius of 50.0 meters. John walks at 1.00 m/s, Joan at 1.25 m/s. How long will it take for them to meet? Can someone please explain this to me?! I keep getting it ...
June 8, 2012

Nitrogen gas molecules, which have mass 4.65×10−26 kg, are striking a vertical container wall at a horizontal velocity of positive 440 m/s. 5.00×1021 molecules strike the wall each second. Assume the collisions are perfectly elastic, so each particle rebounds...
June 3, 2012

PHYSICS!!!
A net force of 30 N is applied to a 10 kg object, which starts at rest. What is the magnitude of its momentum after 3.0 seconds? Can someone please explain this as you go through the steps? I already know the equation is p=mv and I know that mass is 10kg and I just need v...
June 2, 2012

Calculus
Find the volume or the solid generated by revolving around the region bounded by the graphs of the equations about line x=6. xy=6, y=2, y=6, and x=6
May 28, 2012

4. Prove: 2^n + 2^n = 2^n+1
May 27, 2012

math
6. Determine the domain and range for each function given. Explain where any restrictions come from. a. f(x)= sqrt x + 5 – 4 b. f(x) = 1/2x^2 – 32 c. f(x) = 4/x^2 + 1
May 24, 2012

College Algebra
Solve the equation. If necessary, round to the nearest thousandth. 5(2x-1)=10
April 20, 2012

physics
Suppose the spring in this spring-powered rifle has a spring constant of k = 1,000 N/m. How much work can it do in accelerating the projectile, if it is compressed by x = 0.10 m?
March 16, 2012

science
Overpopulation. Increase population=decrease of natural resources.
March 15, 2012

Chemistry
I know that I am close to the answer using this formula with plugged in information: ln p2/760= 40500/8.314(1/273-1/351.1) Just not sure what I am doing wrong. Is someone could assist me that would be greatly appreciated! thanks :)
March 15, 2012

Chemistry
The boiling point of ethanol is 78.5C and delta H vap = 40.5kJ/mol. Calculate the vapor pressure (in torr) of ethanol at 0.0C ?
March 15, 2012

algebra
Write an exponential function to model the situation. Then predict the value of the function after 5 years (to the nearest whole number). A population of 210 animals that increases at an annual rae of 19% Can you explain your answer please?
March 15, 2012

math
b.) 8P3 = 336
March 8, 2012

Algebra II
If F(x)=x^2-x+1 and g(x)=-3x+6, what is the product of f(-1) and g(3)? Help please.
March 2, 2012

Chidren,Families,and Society
I believe the answer is D
February 20, 2012

math
how do you find the derivative of f(x)=2x/(x^2+x+1)^1/2 HELP A.S.A.P.?
February 17, 2012

Algebra 2
(x-4)^3/2 = -6 In the end I got .69, but that's wrong. Please help. I don't really understand. My work. x-4 = -6^2/3 x=4-6^2/3 x=.6980727511
February 13, 2012

Physics
A stuntman sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 10.0 m/s, and the man is initially 2.75 m above the level of the saddle. (a) What must be the horizontal distance between the saddle and limb ...
February 7, 2012

math
The final math grades for all 6th graders were A: 125, B: 200, C: 350, D: 95, and F: 25. Make a bar graph to display this data. In the box below, write a description of your bar graph.
February 2, 2012

Algebra 2
Solve each equation by graphing. Where necessary, round to the nearest hundredth -x^3+2x^2+1=0
January 25, 2012

Algebra 2
Solve each equation by graphing. Where necessary, round to the nearest hundredth x^4+2x-3= 0
January 25, 2012

Algebra 2
Solve each equation by graphing. Where necessary, round to the nearest hundredth -x^3+3x+4=0
January 25, 2012

chemistry
CxHyCz compound weighs 132 amu, what is the molecular formula?
January 23, 2012

Algebra
Thank you. :)
January 11, 2012

Algebra
So would it be (x-1)(x+1)?
January 11, 2012

Algebra
Factor x^2-1=0 How do you factor when there is no B in this equation?
January 11, 2012

Algebra
January 11, 2012

english
what is the correct way to write, (A characteristic I dislike is someone who is weak).
December 6, 2011

physics
A 2 kg ball is dropped from a height of 433 mm. Calculate the height (above the ground) at which KE is one third of PE.
December 3, 2011

Biology
In order to predict the percentage of males and females three assumptions must be considered: 1. The X carrying sperm and Y carrying sperm have an equal chance of fetilization: 2. The egg and sperm combine at random: 3. the XX and XY zygotes have equal chance of development at...
November 24, 2011

chemistry
Reaction with the presence of sunlight would be: CH4 + Br2 --> CH3Br + HBr
November 22, 2011

Math
Sam drives his car 23,040 miles per year. Find this rate in the number of miles driven per month, to the nearest mile
November 10, 2011

Calculus
Suppose f(pi/3) = 3 and f '(pi/3) = −7, and let g(x) = f(x) sin x and h(x) = (cos x)/f(x). Find the following. a. g'(pi/3) b. h'(pi/3)
November 7, 2011

calculus
How do I rond three decimal places?
November 7, 2011

Algebra
Use slopes and intercepts to determine if the following system is consistent, inconsistent, or dependent. -4x - 5y = 20 -12x - 30y = 60
November 3, 2011

Algebra
x/4 - y/2 = -11/4 x/4 + y/2 = 1/4 solve the system
November 3, 2011

Calculus
The number N of US cellular phone subscribers (in millions) is shown in the table. (Midyear estimates are given.) t 1996 1998 2000 2002 2004 2006 N 44 69 109 141 182 233 (a) Find the average rate of cell phone growth between the following years. In each case, include the units...
October 29, 2011

Math
An employee has two hourly wage options for positions in a large corporation. One position pays \$11.00 plus additional unit rate of \$0.50 unit produced. The other pays \$7.25 plus a unit rate of \$1.25. W(x)=11+0.5x M(x)=7.25+1.25x I need to find the solution for the systems by ...
October 22, 2011

Physics 3
Since F = -(dU/dx)i -(dU/dx)j -(dU/dx) = - (9x^2y - 7)i -(dU/dy) = - (3x^3) F = -(dU/dx)i -(dU/dy)j = (-9x^2y+7)i - 3x^3j
October 20, 2011

math
my equation is m 2=c. I want to use my equation to find the cost of a 60-mile trip.
October 17, 2011

history 101
why did the development of civilization in the americas and sub saharan africa differ so dramatically from development in Eurasia? why did certain Eurasia civilizations thrive while others collapsed during the first millenium B.C.E.
October 16, 2011

Algebra
Would this be B? 3(-1) - 2(-2) = 1 (-3) - (-4) =1 1 = 1
October 13, 2011

Algebra
What is the standard form of the equation of the line passing through the point (-1,-2) and perpendicular to the line y= - 2/3x - 1? a. 3x-2y=-1 b.3x-2y=1 c.3x+2y=1 d.3x+2y=-1 I don't understand, can anyone help me please?
October 13, 2011

Hard math
Solve for x using the laws of logarithms. ln(ln x)= 1
October 5, 2011

physics
In suddenly the value of G, the gravitational constant, increased to a billion times its actual value, what sorts of things would happen?
October 5, 2011

Algebra
Simplify the expression. Write the answer without negative exponents. (4a^3b^3)(4ab^2)^2
September 29, 2011

Science
Isn't that cheating though?
September 20, 2011

Chemistry
nevermind
September 18, 2011

Chemistry
Given the Empirical formula: C6H7N, and a molecular mass of 372.52 g/mol, How do I find the MOLECULAR formula for the compound?
September 18, 2011

Math
Use the distance formula to determine whether the points lie on the same line. (0,4),(7,-6),(-5,11). I know the distance formula, but I don't see how that will help me find out if they lie on the same line.
September 16, 2011

English
Write the list words that contain the same o sounds as the examples given. Use the order of the o sounds as shown in the examples. (upsidedown)/e/ as in collect or companion 1 2 3 4 5 (withtwodots)/a/ as in lot 6 7 8 (upsidedown)/e/ as in collect and (lineoverit)/o/ as in ...
September 14, 2011

geometry
what is the base and heigt of a triangle that has an area of 27 feet squared and the height is 3x base?
September 14, 2011

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