Sunday

December 4, 2016
Total # Posts: 988

**Gauss-Jordan elimination**

[1 1 1|7] [1-1-1|1] [1-1-]|3]

*November 21, 2016*

**Math**

5/9 ,7/18 and 1/2 arranged from the smallest to the largest

*October 16, 2016*

**Probability-Cards**

As shown above, a classic deck of cards is made up of 52 cards, 26 are black, 26 are red. Each color is split into two suits of 13 cards each (clubs and spades are black and hearts and diamonds are red). Each suit is split into 13 individual cards (Ace, 2-10, Jack, Queen, and ...

*October 7, 2016*

**CHE 111-03L**

The following system is at equilibrium: 2X(s)+4Y(g)⇌Z(g) Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or no shift in the direction of the net reaction. Half the Volume Remove Some X Double the Volume Add More X

*October 2, 2016*

**Math**

Write and expression that has a value of 100 and the following restrictions: 1. Uses each of the four operations at most once 2. Uses no parentheses 3. Use only the digit 3

*September 8, 2016*

**Art Study**

Thanks for nothing. You don't need a picture to know!

*August 25, 2016*

**Art Study**

What does the expression of this superhero mean? Which of the following steps of art critique are you conducting for this type of question? describe analyze present interpret I think B?

*August 25, 2016*

**math**

Mr. Vasil drove 405 miles on 15 gallons of gas. How many miles can he drive on 1 gallon?

*August 23, 2016*

**Math**

Denise bought some lace to sew around 3 square pillows. Each pillow measured 4 incheson each side. How many feet of lace did denise need for all 3 sides?

*August 18, 2016*

**Science**

Explain the measures toreduce the problems associated with mining and extraction of metal

*August 3, 2016*

**statistics**

A jar contains 2 red balls, 2 blue balls, 2 green balls and 1 orange ball. Balls are randomly selected, without replacement, until 2 of the same colour are obtained. Calculate the probability that more than 3 balls must be selected.

*July 2, 2016*

**math**

find the number that is twelve and a quarter times greater than its reciprocal<x

*June 29, 2016*

**CALCULUS**

State the intercepts, domain and range for y= |0.5x^2-2|.

*June 21, 2016*

**science**

percentage of water of crystallization in Fe(NO3)2

*June 14, 2016*

**algebra 1**

I'm so sorry, I made a mistake in the question!! It is the best measure of center for second period!! Shall I repost?

*June 2, 2016*

**algebra 1**

There is no outlier. I added one and the interquartile changed.

*June 2, 2016*

**algebra 1**

A survey was taken of students in math classes to find out how many hours per day students spend on social media. The survey results for the first-, second-, and third-period classes are as follows: First period: 2, 4, 3, 1, 0, 2, 1, 3, 1, 4, 9, 2, 4, 3, 0 Second period: 3, 2...

*June 2, 2016*

**Algebra 1**

Wait please! I need another website! I still don't necessarily understand. I don't see any outliers. I know that an outlier would affect the median

*June 2, 2016*

**Algebra 1**

Hmm, then would it be D? Also, I am not guessing I am just unsure

*June 2, 2016*

**Algebra 1**

A survey was taken of students in math classes to find out how many hours per day students spend on social media. The survey results for the first-, second-, and third-period classes are as follows: First period: 2, 4, 3, 1, 0, 2, 1, 3, 1, 4, 9, 2, 4, 3, 0 Second period: 3, 2...

*June 2, 2016*

**Calculus**

An observer 150 feet from point C, where a weather balloon has been released. The balloon rises vertically at a rate of 8ft/sec/. At the very instant the balloon is 250 above ground how far is it from the observer? How Quickly is it moving away from the observer at that moment...

*May 18, 2016*

**PHYSICS**

A 6.00g bullet is fired horizontally into a 1.50kg wooden block resting on a horizontal surface. The coefficient of kinetic friction between block and surface is .30. the bullet remains embedded in the block, which is oserved to slide .25m along the surface before stopping. ...

*May 10, 2016*

**Math**

An object's velocity after t seconds is v(t)= 38-2t feet per second. a. How many seconds does it take for the object to come to a stop (velocity = 0)? b. How far does the car travel during that time? c. How many seconds does it take the car to travel half the distance in ...

*April 30, 2016*

**Math**

Can you define the variable, four more than a number divided by 2 is ten.

*April 22, 2016*

**life orientation**

Give 3 human rights violation or discrimination

*April 17, 2016*

**Physics**

A girl standing on a stationary uniform plank 10m long. The plank can move with negligible friction along the surface of the water. A) the girl walks along the plank with a velocity of 2ms-1 relative to the plank until she reaches the end of the plank. The centre of mass of ...

*April 7, 2016*

**Physics**

The activity of a sample of 31Si (T1/2 = 9.43×103 s) is 7.88×105 decays per second. What is the mass of sample present?

*March 26, 2016*

**maths**

A vehicle travels equal distances at 60km/h and 90km/h.calculate its average speed

*March 21, 2016*

**algebra 1**

PLEASE HELp

*March 21, 2016*

**algebra 1**

Given the data set (5, 9), (13, 12), (23, 16), which of the following equations best represents a line of best fit? y = three fourthsx − 7 y = four fifthsx + 7 *** y = three over twox + 7 y = two thirdsx − 7

*March 21, 2016*

**Math**

Determine whether or not the given linear transformation is invertible. If it is invertible, compute its inverse. (If the transformation is not invertible, enter IMPOSSIBLE. Use theta for θ.) Tθ:R2→R2, the reflection of the plane in the line formed by the angle...

*March 10, 2016*

**Linear Algebra**

Find the 3x4 matrix associated with the derivative transformation D:P3→P2 with respect to B = { 1, x, x2, x3} and B' = {1, x, x2}.

*March 10, 2016*

**Pigskin geography week number 20**

Which team will visit a city within its own state for a game

*February 23, 2016*

**Math**

A clock starts at 12:59. What time is it after the minute hand rotates 24 degrees?

*February 18, 2016*

**Physics**

A uniform electric field with a magnitude of 6100 V m−1 points in the positive x direction. Find the change in electric potential energy when a +14 μC charge is moved 5 cm in the positive x direction. Answer in joules.

*February 5, 2016*

**Auburn**

How do you write 234,567 in roman numeral's

*February 3, 2016*

**Math**

The cost of fencing a square field at ₹ 27.50 per metre is ₹55000 . Find the cost of reaping the field at ₹45 per 100 metre² .

*January 29, 2016*

**Geography,maths literecy,life-science,agriculture,LO,sepedi and english**

Which career can suit me?

*January 13, 2016*

**Math**

Rafi had a board that was 15 1/2 FEET long he cut three pieces off the board that are each 3 and 7/8 feet long how much of the board is left

*January 12, 2016*

**physic**

If the gravitational force f is given by f= gm, m2/r^2 derive the dimensions of the constant g.

*January 9, 2016*

**physics**

A clown is rocking on a rocking chair in the dark. His glowing red nose moves back and forth a distance of 0.42m exactly 30 times a minute in a simple harmonic motion. (a) what is the amplitude of this motion? (b) what is the period of this motion? (c) what is the frequency of...

*December 12, 2015*

**physics**

How much would the time keeping of a pendulum clock be affected by taking it to the moon? Gravity is 1.6m/s ^2, compared with 10m/s ^2 on the earth.

*December 12, 2015*

**stat**

CI=2.86 ± 1.76*0.78/√15 =2.86 ± 0.3545 c) (2.51, 3.21)

*December 5, 2015*

**physics**

What force is required to slide a 200 kg box up a 25 degree incline if the coefficient of friction is 0.60?

*November 24, 2015*

**math**

six years ago, jim was four times as old as Fe. In four years, he would be twice as old as fe.How old are they now?

*November 23, 2015*

**Physics**

The interior of a submarine located at a depth of 50 m in seawater is maintained at sea-level atmospheric pressure. Find the force acting on a window 20 cm square. The density of seawater is 1.03 × 103 kg/m3

*November 16, 2015*

**swagodimo**

Calculate the number of moles of hcl(aq)added to sodium thiosulphate

*November 15, 2015*

**Physics**

If the specific heat of ice is 0.5 cal/g degree celsius, how much heat must be released from 5 g of water at 0 degree celsius to change it to ice at -4 degree celsius?

*November 14, 2015*

**Algebra**

2. X - 7 > 10 X > ____ 3. 3x ≤ 21 X ≤ ____ 4.5a - 2 < 18 A<____ 5. 2t+8 ≥ -4(t+1) T ≥ ____ Could someone Please help me I have no idea how to do this

*October 28, 2015*

**Physics**

A gun shoots a bullet at 1200 m/s at an angle of 600 above the horizontal. Neglecting air resistance, determine: a.) its time of flight b.) its range

*October 7, 2015*

**Algebra**

Rewrite the set {x|2Ex<33:xEN} in roster form

*October 5, 2015*

**Ochem**

Write the equation for the reaction that occurs when sodium carbonate is added to the mixture of the reaction and water (hint: a gas is evolved). This is for benzocaine experiment

*October 4, 2015*

**Organic Chemistry**

Write the equation for the reaction that occurs when sodium carbonate is added to the mixture of the reaction and water (hint: a gas is evolved). This is for benzocaine experiment

*October 4, 2015*

**Organic Chem 2**

Write the equation for the reaction that occurs when sodium carbonate is added to the mixture of the reaction and water (hint: a gas is evolved). This is for benzocaine experiment

*October 4, 2015*

**Algebra **

How do I turn this into a algebraic expression, eight more than six times a number added to one more than nine times the number

*September 23, 2015*

**MATH**

Factorise 3k+1-3kh-h

*September 13, 2015*

**Physics**

Thanks Damon!!

*September 13, 2015*

**Physics**

The driver pushes the accelerator pedal as far down as possible. The car does not accelerate above a certain maximum speed. Explain the reason for this in terms of the forces acting on the car.

*September 13, 2015*

**algeb**

2) 100%-15% = 85% 85/100 = 0.85 26.86/0.85= sales price

*September 13, 2015*

**Physics **

A 2000 kg starts from rest and gains a velocity of 20 m/s in 5 s. What force wad applied on it?

*August 29, 2015*

**chs**

Two wires support an electricity pole. if the wires make angles of 58°and 67° with the ground and |AB|=21m, calculate the lengths of the wires

*August 16, 2015*

**Data management**

A card is drawn from a shuffled deck of 52 cards. What's th probability that the card is a spade or a face card?

*July 29, 2015*

**Math**

You have three toonies and two loonies in your pocket. You pull one coin out and then pull out another (without replacing the first) 1) show the total of all the probabilities is 1 2) show using combinations that part 1) is correct

*July 14, 2015*

**math**

5t^2-7t=1 find exact solution

*July 2, 2015*

**chem**

A 0.158 g sample of magnesium metal reacts completely with 100.0 mL of 1.0 M hydrochloric acid in a coffee cup calorimeter. The temperature of the solution rose from 25.6°C to 32.8°C. What is ∆Hrxn? Assume the specific heat of the solution is 4.184 J/mol-K and ...

*June 25, 2015*

**socialology**

Describe a situation in which you might see a gesselschaft community partnered with mechanical solidarity.

*June 16, 2015*

**english**

"I hope this song will help you to bring your country back to its stage it was and motivate to develop it more further. " this dialogue

*May 6, 2015*

**english**

"I hope this song will help you to bring your country back to its stage it was and motivate to develop it more further. " Since the logic of the dialogue is not correct; write a short reply going against him. ( DEBATE )

*May 6, 2015*

**math**

prove that: 4cosec2ACot2A=cosec^2A - sec^2A

*May 6, 2015*

**Maths **

A pool is 12m long and 7m wide it is surrounded by a 3m paved area on all sides the whole complex is enclosed by a 2m high fence what is the total length of this fencing

*May 4, 2015*

**Algebra**

a car driver accelerates to a speed of 35 miles per hour and then takes her foot off the gas pedal even though she does not press the brake pedal at any time she eventually rolls to a stop which of the following most likely causes the car to come to a stop

*April 17, 2015*

**physics**

B C C C D B A C B D B D C A C B B D A D

*April 17, 2015*

**Math**

Prove that 140 * 141 * 142 * ... * 159 * 160 is divisible by 4321.

*April 15, 2015*

**HELP MEH PLS**

I actually need help with number 1 1. a. fluorescence b. rarefaction c. radioactivity** d. electromagnetic Could you tell me if this is right?

*April 1, 2015*

**Geo**

Indonesia & Malaysia

*March 7, 2015*

**science**

when astone is thrown slighty above amoving lorry .where will the stone fall? .2.when loam soil is mixed with sandy soil .what will not change?

*February 26, 2015*

**physics**

Calculate the total resistance for a 650 ohm, a 350 ohm, and a 1000 ohm resistor connected in series.

*February 4, 2015*

**math**

given thatvABCD is a parallelogram where A(1,2),B(4,4), and C(6,2) determine the coordinates of D using vector?

*January 29, 2015*

**chemistry**

What amount of carbon dioxide is produced per kJ of heat produced in burning ethene, C2H4?

*January 23, 2015*

**Calculus**

Also how would I figure out how fast the pile is increasing? ..I don't really understand whats the difference from finding the actual height after five minutes or how fast it is increasing.

*December 31, 2014*

**Calculus**

How would I find out what the height of the pile would be after 5 minutes? A machine starts dumping sand at the rate of 20 m3/min, forming a pile in the shape of a cone. The height of the pile is always twice the length of the base diameter. The volume formula for a right ...

*December 31, 2014*

**Math**

Waitttttttt, nevermind I figured it out :) its 4

*December 21, 2014*

**Math**

If 12 ft^2 of material is available to make a box with a square base and an open top, find the largest possible volume of the box. 2 ft3 4 ft3 5 ft3 8.5 ft3 9 ft3 the whole ft^2 and ft^3 throws me off..can you help

*December 21, 2014*

**linear approximation**

a) Find the linear approximation of the function f(x)=4cos(3x^2) near x = 0 b) Use the approximation found in part (a) to estimate the value of f(pi/20)

*December 7, 2014*

**chem**

Draw the two chair conformers of cis-1-ethyl-4-isopropylcyclohexane

*December 3, 2014*

**chemistry**

Why do alkenes but not alkanes exhibit cis-trans isomerism?

*December 3, 2014*

**Physics**

determine the submerged depth of a cube of steel 0.3m on each side floating in mercury given the specific gravities of steel and mercury as 7.8 and 13.6 respectively.

*November 27, 2014*

**Geometry**

no clue

*November 26, 2014*

**Physics Collision problem**

Np Bro

*November 25, 2014*

**Physics Collision problem**

your process is wrong I ended up with the wrong answer. of 2.9*10^5 instead of THE REAL ANSWER 3.4*10^5 and 21 degrees. thanks for nothing

*November 25, 2014*

**Physics Collision problem**

A 238U nucleus is moving in the x-direction at 4.8×105m/s when it decays into an alpha particle (4He) and a 234Th nucleus. The alpha moves at 1.2×107m/s at 36∘ above the x-axis. a. Find the speed of the thorium nucleus. v= b. Find the direction of the motion ...

*November 25, 2014*

**Managerial Economics**

Mirk Labs is a pharmaceutical company that currently enjoys a patent monopoly in Europe, Canada, and the U.S. on Zatab, an allergy medication. The global demand for Zatab is Qd= 15.0- 0.2 P where Qd is annual quantity demanded (in millions of units) of Zatab, and P is the ...

*October 30, 2014*

**Managerial Economics**

Mirk Labs is a pharmaceutical company that currently enjoys a patent monopoly in Europe, Canada, and the U.S. on Zatab, an allergy medication. The global demand for Zatab is Qd= 15.0- 0.2 P where Qd is annual quantity demanded (in millions of units) of Zatab, and P is the ...

*October 29, 2014*

**Math**

There are some animals in a farm.there are 50 goats. the ratio of goats to sheeps is 1:4. find sheep

*October 27, 2014*

**Math**

Thank you Don :)

*October 27, 2014*

**Math **

1/4 of Peter's money is the same as 2/3 of James money, James has $60. How much do they have altogether?

*October 27, 2014*

**physics**

A Titan IV rocket has put your spacecraft in a circular orbit around Earth at an altitude of 230 km. Calculate the force due to gravitational attraction between the Earth and the spacecraft in N if the mass of the spacecraft is 2300 kg.

*October 25, 2014*

**Physics 203**

Car 1 has 6 times the mass of car 2, but only 0.4 as much kinetic energy. What is the ratio between the speeds of the two cars (v1/v2)? You must type your answer as a numerical value.

*October 8, 2014*

**ethics**

a. Faith in the future.

*August 25, 2014*

**economic**

Is the south african government is not providing enough welfare or subsidies to the poor and underpriviledged?

*August 19, 2014*