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August 31, 2014

Posts by Johnson


Total # Posts: 60

mathematics
-(x-4)(x-1)+5(3x-1)(2x+1) expand and simplify
March 23, 2014

math
determine the equation of a circle that has its center a (0,0) and passes through each point. a)(6,-3)
March 16, 2014

math
state the corrdinates of the centre of the circle described by the equation. x^2+y^2=R^2 please help!
March 16, 2014

Phyics
A spiral staircase winds up to the top of a tower in an old castle. To measure the height of the tower, a rope is attached to the top of the tower and hung down the center of the staircase. However, nothing is available with which to measure the length of the rope. Therefore, ...
November 11, 2013

Phyics
A 1390-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Using the data shown in the figure, find (a) the magnitude of the tension in the wire and the magnitudes of the (b) ...
November 10, 2013

physics
a body is under of 2 forces 7n and 10n find the resultant of 2 forces if (a)the forces are parallel and act in thesame direction (b)the forces are parallel and act in opposite direction(c)the two forces are inclined and act at an angle of 60 degree to each other (d)the 2 ...
September 29, 2013

physics
a body is under of 2 forces 7n and 10n find the resultant of 2 forces if (a)the forces are parallel and act in thesame direction (b)the forces are parallel and act in opposite direction(c)the two forces are inclined and act at an angle of 60 degree to each other (d)the 2 ...
September 29, 2013

chemistry
If a student attempts to identify an unknown compound by methodused in this experiment. She finds that when she heated a sampleweighing 0.4862 g the mass went down appreciably, to 0.3067 g. Whenthe product was converted to chloride, the mass went up, to 0.3382g. a. Is the ...
February 27, 2013

smitty
is 8m cubed - 25 prime?
January 31, 2013

crt 205
final project topic: American Patriotism is Alive and Well
November 24, 2012

Math
40.80
August 22, 2012

Chemistry
Explain, in terms of particles, concentration, and reaction rate, what you expect to happen when methane gas (CH4) and hydrogen sulfide gas (H2S) are sealed in a flask and reach a state of equilibrium. CH4 (g) +2 H2S (g)<=> CS2 (g) + 4 H2 (g)
April 15, 2012

algebra
ben bought a car for $20,000 in 2003. The car depreciates at a constant rate of 21% per year . Find the price of the car in the year 2010 . Round to nearest dollar
March 12, 2012

Probability
Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 <a> if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student is chosen...
February 4, 2012

statistics
Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 <a> if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student is chosen...
February 4, 2012

Math
Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 <a> if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student is chosen...
February 4, 2012

Math
Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 <a> if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student is chosen...
February 4, 2012

Phi103
What is the truth value of the sentence "P v ~ P"? (Points : 1) True False Cannot be determined Not a sentence 2. One of the disadvantages of using truth tables is (Points : 1) it is difficult to keep the lines straight T's are easy to confuse with F's. they ...
December 12, 2011

math
would you show me how you solved -110/11
November 20, 2011

math
10
November 20, 2011

math
Please divide if possible -110/11
November 20, 2011

math
please simplify 16/9
November 20, 2011

Math
4/3 x (4/3) If you multiply what would it be please show steps and answer
November 20, 2011

math
please help me solve by multiplication principle; -x/9=1/16
November 19, 2011

math
please simplify [5-5(2-4)]
November 19, 2011

math
when solving using multiplication principle -13x=273 how do i solve plus perform check
November 19, 2011

math
translate the phase to an alegebraic expression; John has $30.00 before spending N dollars on food how much money remains?
November 19, 2011

math
please help me solve and explain the answer 96+(-100)+773+(-297)+10+(-251)
November 19, 2011

math
please solve using the multplication principle -x/9=1/6
November 19, 2011

math
can you help me to find an equivalant expression without parentheses -(y-25)
November 19, 2011

math
So is -(y-25) is an equivalant expression without parentheses =25y
November 19, 2011

Math
how do I find a equivalant expression without parentheses -y(y-25)=
November 19, 2011

Math
I do not understand please explain for me solve for the indicate letter x=13+x, for x the solution is x =
November 19, 2011

math
Please explain this exercise and give answer y = 13+x, for x
November 19, 2011

Math
please help me to solve this problem -2 x(-7)x (-9)
November 19, 2011

math
-94+(-19)
November 17, 2011

math
44 more thatn Q algebraic expression
November 17, 2011

Algebra
96
November 8, 2011

math
228.29056
August 8, 2011

Math
we need to fence off a rectangular section of land in order to make some huge play pens. All four sides will be fenced and there will also be 2 parallel fence lines inside the perimeter in order to make 3 identical fields. If we have 2600 meters of fencing, we need to ...
February 24, 2011

math
put these in order from least to greatest. 0.145,0.15,0.155,0.1 1/12,0.12,1/20,0.20,1/6,0.6,0.06,0.16 Can someone please help me somehow a tip would be more useful than the answer though
November 17, 2010

Analytical Chemistry
advantages and diaadvantages of potentiometris titration
June 10, 2010

math
An advertisement states that 8 thermometers cost 12.42 minus a 3% disc. Dr. wants to order a dozen to take advantage of the savings sales tax is 5%. What would the cost be? I divided 8 into 12.42 wich gives you 1.55 per thermometer 1.55 x 12 thermometers = 18.60 18.60+93 cent ...
May 9, 2010

math
How did you come up with (1.02)
May 9, 2010

math
John's account of 98.50 has been delinquent for 3 months. After 90 days office charges a 2% service charge, compounded monthly that is added to future bills. What would be the amount owed after 9 months? My math is 98.50 x 0.02 = 1.97 1.97 x 12 months = 23.64. Take 3 ...
May 9, 2010

math
supplies on invoice are 4 bottles alcohol @ 2.25 each = 9.00 3 thermometers @ 1.95 each = 5.85 6 boxes cotton @ .29 each = 1.74 6 bottles mouthwash @ .89 = 5.34 11 crtns cotton swabs @ .39 each = 4.29 3 hypo needles @ .39 each = 1.17 Dr. receives 3% disc, and sales tax is 6%. ...
May 9, 2010

crt 205
American Patriotism is Alive and Well
August 9, 2009

Microeconomics: Budjet Constraint
To be more clear, (20,0) to (7,0)
August 6, 2009

Microeconomics: Budjet Constraint
Sorry I should have said that fractional sushi rolls and cans of soda are possible. What I was thinking was, with soda on the vertical axis and sushi on the horizontal axis, we have a horizontal line at $7 on the vertical axis. So basically a straight line down at (20,0) till ...
August 6, 2009

Microeconomics: Budjet Constraint
You have decided to eat sushi for lunch and have a grand total of $20 to spend. Whatever money you have left over from buying sushi rolls will be spent on cans of soda to get you through the rest of the day. Your problem is to choose the best combination of sushi rolls and ...
August 6, 2009

biology
Whats "SA to V ratio"?
December 1, 2008

biology
1. Explain the problems that growth causes for cell 2. Describe how cell division solves the problem of cell growth
December 1, 2008

Physics
The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 3.50 105 Pa, and the horizontal divisions represent 2.00 10-3 m3. Determine the work done (including algebraic sign) in each segment of the path. (a) A ...
April 20, 2008

Physics
An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m. Assume that the air in the room is composed of 79% nitrogen (N2) and 21% oxygen (O2). At a temperature of 27°C and a pressure of 1.01 105 Pa, what is the mass (in grams) of the air? Ideal gas formula is...
April 20, 2008

Physics
An ideal gas at 6.0°C and a pressure of 1.92 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 4.60 m3 and temperature raised to 30.5°C, what will be the pressure of the gas? Pa I used the formula n= (pv)/...
April 20, 2008

Physics
A jogger's internal energy changes because he performs 6.80 105 J of work and gives off 4.9 105 J of heat. However, to cause the same change in his internal energy while walking, he must do 8.10 105 J of work. Determine the magnitude of the heat given off while walking. J
April 18, 2008

Physics
An engine has an efficiency of 61% and produces 7900 J of work. Determine each of the following. (a) the input heat J (b) the rejected heat J
April 18, 2008

Physics
A 0.21 kg ball on a string is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, the tension is 18 N. -------------------------------------------------------------------------------- (a) How does the magnitude of the ...
April 11, 2008

Physics
that's what I have been working and keep coming up with either two answers 9.29 or 9.29 * 10 ^10 and the computer is telling me its wrong I don't know what else to do. Maybe I'm computing the number wrong.
April 11, 2008

Physics
A ruler is accurate when the temperature is 25°C. When the temperature drops to -16°C, the ruler shrinks and no longer measures distances accurately. However, the ruler can be made to read correctly if a force of magnitude 1.2 103 N is applied to each end so as to ...
April 11, 2008

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