Tuesday

March 3, 2015

March 3, 2015

Total # Posts: 4,286

**math 5**

Identify the solution(s) of the system of equations, if any. 3x+2y=4 5x-4y=3 A) (1, 0.5) B) (0.5,1) C) (5, 5.5) D) 5/11, -2/11)
*October 20, 2013*

**Math 6**

Identify the solution(s) of the system of equations, if any. -3x-4y=2 8y=-6x-4 A) infinitely many solutions B) (-16/9, 5/6) C) (-2/3, 0) D) no solution
*October 20, 2013*

**math 4**

Identify the solution(s) of the system of equations, if any. 6x + 2y = 0 y = 1 - 5x A) (–1.5, –0.5) B) (–1.5, 0.5) C) (–0.5, –1.5) D) (0.5, –1.5)
*October 20, 2013*

**Math 3**

Identify the solution(s) of the system of equations, if any. x + 2y = 6 3x - 6y = 0 A) (3, 2/3) B) (3,3/2 ) C) (2/3, 3) D) (3/2, 3)
*October 20, 2013*

**Math 1**

Consider the following system of equations. y = 4x - 4 y - 4x = 3 What can you conclude about the system of equations? A) The system of equations is inconsistent. B) The system of equations is dependent. C) The system of equations is independent. D) none of these
*October 20, 2013*

**math**

Identify the solution(s) of the system of equations, if any. -4x - 4y = 4 4y = -4x - 4 A) no solution B) (0, -1) C) (-1, 0) D) infinitely many solutions
*October 20, 2013*

**chemistry thermodynamics**

a sample of methane gas of mass 25g at 250k and 18.8atm expands isothermally until its pressure is 2.5atm. calculate the change in entropy.
*October 19, 2013*

**Chemistry**

how do I do this problem 0.700 mol of Na2S in 1.55 of solution?
*October 17, 2013*

**Trigonometry - Proof**

Thanks a lot!!!
*October 16, 2013*

**Math - Trigonometry**

Wait, is cos x the y coordinate or the x coordinate?
*October 15, 2013*

**Math - Trigonometry**

Thank you sir, I will take your advice. However, this problem is for an online class, and 2 does not seem to be the answer. Hmm...why?
*October 15, 2013*

**Math - Trigonometry **

For how many values of theta such that 0<theta<360 do we have cos theta = 0.1? (Note that theta is a measure in radians, not degrees!) I'm kinda confused with the problem? Could someone help me? I'm thinking unit circle, so cos is the x coordinate. It would be ...
*October 15, 2013*

**mathematics**

1. We need to find the greatest common divisor. IT might be 36. We check : 36/36 =1 , 72/36 = 2, 144/36 = 4 So the greatest number of students who can receive fruit is 36 (each student gets 1,2,4 fruits respectively) 2. Hmm...I'm sorta confused about this question...are ...
*October 15, 2013*

**ccbc**

A 12.3 vessel was found to contain N2, Ar He, and He. The total pressure in the vessel was 987 torr and the partial pressures of nitrogen, argon, and helium were 44 torr, 486 torr, and 218 torr, respectively. What was the pressure of neon in the vessel?
*October 14, 2013*

**math**

i'm still a bit confused
*October 13, 2013*

**biology help plz?????????????????**

Please tell me which one is TRUE or FALSE for the statements below: 1. During the cardiac cycle the pressure in the left ventricle and right ventricle are approximately equal. 2. During isovolumetric contraction the left ventricular pressure continues to increase and ...
*October 10, 2013*

**biology help?**

Please tell me which one is TRUE or FALSE for the statements below: 1. During the cardiac cycle the pressure in the left ventricle and right ventricle are approximately equal. 2. During isovolumetric contraction the left ventricular pressure continues to increase and ...
*October 10, 2013*

**Science**

When the number of gas particles in a container with constant volume decreases, does the pressure of the gas increases? If the number of gas particles at constant pressure increases, will the volume of the gas decrease? What is the relationship between gas particles and volume...
*October 9, 2013*

**math**

An internet company charges $30 a month. There is also a $30 installation fee. Is the number of months you can have internet proportional to the total cost?
*October 6, 2013*

**Math**

A paddle on an antique windmill needs to be visually inspected by a repairmen while the windmill is operating. The paddle can be seen by the repairman when it is at a height of 1.9m on its downward path. If the height of the paddle can be represented by the function, y=1.2764 ...
*October 4, 2013*

**math**

Rob has a balance of 1695$ in his bank account The account pays 2.9% interest per year, compounded annually. The compound interest formula is A=P(1+i)^n A=future value\P=principal/i+interest rate/n=number of payments rods balance will reach 3000$ after how many years?
*October 3, 2013*

**physics**

A football is thrown toward a receiver with an initial speed of 15.4 m/s at an angle of 38.7 ◦ above the horizontal. At that instant, the receiver is 17.7 m from the quarterback. The acceleration of gravity is 9.81 m/s 2 . With what constant speed should the receiver run...
*October 3, 2013*

**physics**

A football is thrown toward a receiver with an initial speed of 15.4 m/s at an angle of 38.7 ◦ above the horizontal. At that instant, the receiver is 17.7 m from the quarterback. The acceleration of gravity is 9.81 m/s 2 . With what constant speed should the receiver run...
*October 3, 2013*

**math**

The path of a cliff diver can be modeled by a parabolic curve. The regression equation matching one particular dive is h(t)= -4.9^2+4.6x+24.8 h is height t is time in seconds at what point in meters did the diver reach maximum height?
*October 2, 2013*

**math**

Please Help! The perimeter (distance around) of a triangle is 7/x+1, The sum of two sides of the triangle is 3/x, the distance of the remaining side follows he format ax+b/x^2+x. what is the vale of a?
*October 2, 2013*

**math**

The probability of rolling an even number of a die and drawing a red marble from a bag containing 3 red marble and 5 green marbles must be expressed as a reduced fraction of the form a/b what is the value of a and b?
*October 1, 2013*

**math**

Given the set (1,2,3,4,5) how many 3-digit numbers can be formed if the first digit is 5 and no digit is repeated?
*October 1, 2013*

**math**

In how many ways can 5 books be arranged on a shelf If 2 of the books are identical?
*October 1, 2013*

**math**

n!/n(n-1) is equivalent to? a) (n-2)! b) n-1 c) 1 d) 1/n-1
*October 1, 2013*

**math**

thank you. dont know how i missed 17.3
*September 30, 2013*

**math**

Never did prime numbers before today. 51times 1 is the only 2 numbers. confused
*September 30, 2013*

**math**

The LCM of two numbers is 51. Both numbers are greater than 1 and both numbers are prime. What are the two numbers?
*September 30, 2013*

**math**

Thanks, but i am still not sure of how you got it. Is there another way ?
*September 30, 2013*

**math **

The GCF of two numbers is 850. Neither number is divisible by the other. What are the least two numbers these could be.
*September 30, 2013*

**physics**

3. A box is given an initial speed of 3.0 m/s up an incline where the angle θ =22o. Use the diagram below to define the x-y axes. Assume the original position is on the ground (xo and yo = 0). Ignore friction. a. How far up the plane (in meters) will the box go? b. How ...
*September 30, 2013*

**math**

1,1/3,1/5,1/7, meaning the next number is 1/9 right?
*September 29, 2013*

**math**

1,0,1,1,01,1,1,0,1,1,1,101, meaning the next numbers are 1,01, right?
*September 29, 2013*

**Math**

How would you solve these compound inequalities? 1. -5k<-10 OR 3k>-9 2. 1/2z+3<-4 OR 2/3z-1>=1/5 3. -2<=n+2 divided by 3 <=4 4.p+4>6 AND 3p<=-18
*September 29, 2013*

**Main Ideas**

Both Seagulls and wild geese are large birds. They're also similar in that both kinds of birds can fly over great distances. On the other hand, seagulls are scavengers, while wild geese aren't. Seagulls, for example, are often found around garbage dumps. Geese, however...
*September 27, 2013*

**Algebra**

Factor completely Y^3+y^2-4y-4
*September 26, 2013*

**Math**

How do you write an equation to solve for x when you have a rectangle that is 7 for height and 3x - 2 on length and how do you solve for x?
*September 26, 2013*

**physics**

A soccer ball is kicked from the ground with an initial speed of 20.0 m/s at an upward angle of 43.7˚. A player 50.3 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before ...
*September 25, 2013*

**math**

Thank you for all your help.
*September 25, 2013*

**math**

Need help . A board is 24 inches long. Find all the whole- number lengths into which it can be evenly divided
*September 25, 2013*

**English**

What literary device would pertain to these sentences? 1. He leaned hard against the wall. (Upright structure which encloses something or serves as a boundary) 2. "It was not the buildings or arch that made the children gasp. It was how the buildings were shaped-- ...
*September 23, 2013*

**Math**

The x is a variable put into the equation so it would be -6x + (plus) (1 - 3x) * 8
*September 23, 2013*

**Math**

umm.. it is -6x + (1 - 3x) * 8
*September 23, 2013*

**Math**

Multiplication signs. Sorry :(
*September 23, 2013*

**Math**

Can I get help on just 3 questions? -6x + (1 - 3x) x 8 (r-1) x -3 - 3 (n-4) x -7 +7 Thanks
*September 23, 2013*

**Math**

Please help! 1) -6 + 5(-5 - 3m) 2) -3 + 4(x + 2) 3) 3(1 + 5n) - 6n 4) -6b - 6(3 -4b) 5) -6x + (1-3x) x 8 6) (r - 1) x -3 - 3 7) (n - 4) x -7 + 7 8) -4(6 + 4v) + 7 Thanks.
*September 23, 2013*

**math**

thank you
*September 23, 2013*

**math **

P lease need help with the following 4,830.5 divided by 5 round to the nearest hundredth. and 68.1 divided by 13 also rounded to nearest hundredth
*September 23, 2013*

**physics **

An electron at ground state in the atom (-10.38eV)is struck by a passing electron with 7.00eV of energy. What is the velocity of the passing electron afrer the collision?
*September 23, 2013*

**physics **

An electron at ground state in the atom (-10.38eV)is struck by a passing electron with 7.00eV of energy. What is the velocity of the passing electron afrer the collision?
*September 23, 2013*

**physics**

Neon-20 has a nuclear mass of 19.992439 amu. the total nuclear binding energy for Ne-20 is? (Mprotons=1.6726x10^-27 kg) (Mneutron=1.6749x10^-27kg)
*September 23, 2013*

**AP Physics**

A pail of water is rotated in a vertical circle of radius r = 1.49 m. The acceleration of gravity is 9.8 m/s 2. What is the minimum speed of the pail at the top of the circle if no water is to spill out? Answer in units of m/s
*September 23, 2013*

**Physiology**

How does semiconservative relates to DNA replication?
*September 22, 2013*

**math**

thank you very much
*September 22, 2013*

**math**

Please help. round to the nearest penny [ hundredth] $10.13 x4.5
*September 22, 2013*

**chemistry**

A particle with the mass of a proton is trapped in a box. The particle falls from the n=3 state to the n=2 state and emits 0.16 meV of energy. What is the size of the box? Please report your answer in nm.
*September 21, 2013*

**physics**

An observer uses a 10 sided mirror to measure the speed of light. A clear image occurs every one-tenth of a rotation when the mirror is rotating at 4.31x10^2 rev/s. The total path of the light pulse is 60 km, measured from the light source to the mirrors and reflected back to ...
*September 20, 2013*

**Math, Trigonometry**

The height of a person on a ferris wheel is measured by function h(t)=38 sin 3.5 (t-4.0)+41.? h= height of person in feet t=represents the time in minutes. a) At what height, to the nearest tenth, are passengers loaded onto the Ferris wheel ? what characteristics of the graph ...
*September 19, 2013*

**Physics**

What net external force is required to give a 30 kg suitcase an acceleration of 2.5 m/s2 to the right? Answer in units of N
*September 18, 2013*

**Math**

Estimate the total weight of two boxes that weigh 9.4 lb and 62.6 lb using rounding and compatible numbers. Which estimate is closer to the actual weight?Why?
*September 17, 2013*

**College Algebre**

f(x)= -3x^2+5x-2 Find f(x+h)/h
*September 16, 2013*

**Maths**

Nth terms I have to find the first 5 terms in the nth sequence. please could someone show me how to work this out, using the example below so I can do the next set of questions. 10-2n
*September 16, 2013*

**Physics**

When nitrogen(atomic mass=14,atomic number=7) is bombarded with neutrons, the collision resulted in disintegrations in which alpha particles are produced. Represent this transmutation in symbolic equation .
*September 15, 2013*

**Biology 101 **

When we say an atom has an incomplete outer shell, this means the atom has ______________________ electrons in its outermost shell. Atoms that have incomplete outer shells usually seek to fill their shells by forming ____________________ ________________ through the sharing or...
*September 13, 2013*

**Math**

What should the n value be if I want to compound by the second? How about by the milisecond?
*September 12, 2013*

**math**

What is the coordinates of the x-intercept. -x + 5y = -15
*September 12, 2013*

**Geometry**

I think it's D
*September 11, 2013*

**Geometry**

A. √14 miles; √22 miles B. 7 miles; 11 miles C. 4√3 miles; 4√7 miles D. 4√3 miles; √22 miles
*September 11, 2013*

**Geometry**

Kristen lives directly east of the park. The football field is directly south of the park. The library sits on the line formed between Kristen’s home and the football field at the exact point where an altitude to the right triangle formed by her home, the park, and the ...
*September 11, 2013*

**Math - Fractions**

7 weeks
*September 10, 2013*

**Math, science**

assume the substance has a half-life of 12 years and the initial amount is 133 grams. How long will it be until only 40 % remains?
*September 10, 2013*

**Math, Trigonometry**

daylight in Calgary, AB each month is show in the table below.? Month Daylight (hrs) Jan 8.50 Feb 10.03 March 11.91 April 13.87 May 15.57 June 16.48 July 16.03 Aug 14.51 Sept 12.63 Oct 10.68 Nov 9.20 Dec 7.99 a) Determine the regression equation that models the number of ...
*September 9, 2013*

**physics**

1. When material decays, it emits a particle. An experiment similar to the J.J. Thomson experiment is performed to determine the charge-to-mass ratio of this particle. It is found that the particle moves undeflected through mutually perpendicular magnetic and electric fields ...
*September 9, 2013*

**Math**

Thanks so much! it helped alot :D
*September 9, 2013*

**Math**

how do you know if one is a factor of another without dividing. a) 4320 can be divided be divided by 2,5,10 evenly. How? b)can 4230 be divided by 3 and 9? c) can 98,022 be divided by 2,3,5,9,10? use divisibility rules. I need help with these questions please i summed it up a ...
*September 9, 2013*

**physics **

a racing car completes a lap of a 300 meter circular track in 20 seconds. the car's average speed for the lap is most nearly a)0.0m/s b)10m/s c)15m/s d)20m/s e)31.4m/s
*September 2, 2013*

**pysics**

two automobiles are 60 miles apart an dtraveling in the same direction. The first automobile is behind the second and is moving at 60 mph and overtaking the second automobile which is moving at 45 mph. in how many hours will the first pass the second. a)4 b)2.5 c)1.75 d)1.5 e).55
*September 2, 2013*

**science**

1. Earth's capital includes all of the following except a. wildlife. b. nutrients. c. water. d. soil. e. sunlight.
*September 2, 2013*

**physics **

Find the horizontal and vertical components of the d = 140 m displacement of a superhero who flies from the top of a tall building following the path shown in Fig. P3.18 where θ = 28.0°.
*September 1, 2013*

**physics **

Chinook salmon are able to move through water especially fast by jumping out of the water periodically. This behavior is called porpoising. Suppose a salmon swimming in still water jumps out of the water with velocity 6.41 m/s at 44.1° above the horizontal, sails through ...
*September 1, 2013*

**math **

joshan bought 78 stickers she bought 4stripsof 10 and some singles how many singles did he buy
*August 29, 2013*

**physics**

An oil-drop, that has a mass of 3.5 × 10-15 kg and an excess of 7 electrons, is located between horizontal parallel plates. The plates are separated by a distance of 2.5 cm and have and potential diffeDetermine the magnitude and direction of the acceleration on the ...
*August 14, 2013*

**help**

How is a parent generation of a fern different from the generation that comes before or after it?
*August 10, 2013*

**algebra**

Gregg has q quarters and p pennies. His brother has 4 times as many quarters and 8 times as many pennies as gregg has. Write the sum of the numbers of coins they have, and then combine like terms
*August 10, 2013*

**math**

Gregg has q quarters and p pennies. His brother has 4 times as many quarters and 8 times as many pennies as gregg has. Write the sum of the numbers of coins they have, and then combine like terms
*August 10, 2013*

**physical**

A box slides downwards at a constant velocity on an inclined surface that has a coefficient of friction uK = .58 The angle of the incline, in degrees?
*July 30, 2013*

**math**

No clue .Never did this in 4th grade
*July 26, 2013*

**math **

Sally cuts a piece of paper to make a greeting card. Two opposite sides are 8 inches long. The other two opposite sides are 4 inches long. All the sides meet at right angles. How can this shape be classified? Name all the ways from most specific to most general.
*July 26, 2013*

**math**

Thought it was 30 but it didnt seem right. Too many flowers it seemed. Thank you
*July 26, 2013*

**math **

Jill is planting a row of flowers 10 ft long in her garden. If she plants a flower every 1/3 ft, how many flowers can she plant?
*July 26, 2013*

**math**

Thank you
*July 26, 2013*

**math**

What is the maximum number of 1-cm3 cubes that can fit into a box with a volume of 1,200 cm3
*July 26, 2013*

**math**

thank you
*July 26, 2013*

**math **

ED is making a scale drawing of a bridge on a shrrt of paper. The actual bridge is 200 feet long . To get the dimensions for the drawing, is ED multiplying by a number greater than 1 or a number less than 1 ? Explain
*July 26, 2013*

**calculus**

A ball is thrown straight downward from the top of a tall building, with an initial speed of 30 ft/s. Suppose the ball strikes the ground with a speed of 190 ft/s. How tall is the building? Acceleration is -32 ft/s squared
*July 24, 2013*

**math **

Which point is located on the y-axis of a coordinate plane? 6,0 3,2 6,6 0,6
*July 19, 2013*

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