Monday

February 27, 2017
Total # Posts: 1,962

**Chemistry**

A reaction requires 22.4 L of gas at STP. You have 30.5 L of gas at 101.5 kPa and 373 K. Which of the following statements is true? (Use the ideal gas law: PV = nRT where R = 8.31 L-kPa/mol-K.) You will have excess gas for the reaction. You will have enough gas for the ...

*February 13, 2017*

**sciance**

is a car faster than usain bolt in a 100m race

*February 12, 2017*

**English**

I've read the entire offal book im just not sure about these 4 answer. No one can help me tho because no one else has ever read this god offal book.

*February 8, 2017*

**English**

Ethan Frome test please check my answers and correct them if they are wrong 4. Which word best describes the atmosphere, or mood, of the Prologue and Chapter I? A. jolly B. comfortable C. severe D. superstitious B is wrong Answer c 11. What kind of conflict describes the ...

*February 8, 2017*

**English**

Ethan Frome test please check my answers and correct them if they are wrong 4. Which word best describes the atmosphere, or mood, of the Prologue and Chapter I? A. jolly B. comfortable C. severe D. superstitious B is wrong Answer c 11. What kind of conflict describes the ...

*February 8, 2017*

**English**

Ethan Frome test please check my answers and correct if they are wrong 4. Which word best describes the atmosphere, or mood, of the Prologue and Chapter I? A. jolly B. comfortable C. severe D. superstitious B is wrong Answer c 11. What kind of conflict describes the struggle ...

*February 7, 2017*

**Chemistry**

Assume that 5.00 grams of zinc react with excess HCl according to the following equation: Zn + 2HCl = ZnCl2 + H2 The hydrogen was collected over water at 20.0C and the prssure of the atmosphere is 751 mmHg. The pressure of the water vapor at 20C is 17.5 mmHg. How many moles of...

*January 16, 2017*

**LA**

PLEASE check my answer this is my last test and i d not want to mess up PLEASE 1. Which sentence contains an opinion? (1 point) Thomas Jefferson supported American independence from Great Britain. He was a lawyer in his home state of Virginia. Jefferson authored the ...

*January 5, 2017*

**MAth**

I got 55% but do not take my word. I think you should wait for the answer from an actual tutor. I did 50/90 which led me to 55% of babies that were born yesterday were girls. I would still wait for an answer from someone else and not put that until someone with higher ...

*December 11, 2016*

**Geometry**

A tree stands 22 feet tall and is 382 feet from a building. The tree casts a shadow that is 40 feet long. How tall is the building? I got 211 feet, but I do not think that is correct. Can you tell me what I am doing wrong? I set it up like this h/382=22/40 Thank you!

*December 11, 2016*

**Geometry Honors**

Thank you!

*December 11, 2016*

**Geometry Honors**

A tree stands 22 feet tall and is 382 feet from a building. The tree casts a shadow that is 40 feet long. How tall is the building?

*December 11, 2016*

**social studies**

and second of all you can not talk to me like that.

*November 29, 2016*

**social studies**

first of all I was not talking about 2. I was talking about 4.

*November 29, 2016*

**social studies**

d?

*November 29, 2016*

**social studies**

means

*November 29, 2016*

**social studies**

ok i know what involuntary

*November 29, 2016*

**social studies**

hellooooo?!

*November 29, 2016*

**social studies**

kinda?

*November 29, 2016*

**social studies**

1) BLANK are people who move into one country from another. A) Emigrants B) Immigrants C)Urbanites D) Nomads 2. One of the largest involuntary migrations in history was the transatlantic A) Irish migration. B) immigrant wave. C) slave trade. D) migration of Hindus from ...

*November 29, 2016*

**Maths**

In a triangle with angles ?,?,? and opposite sides a, b, c you are given: ?=35°, ?=100°, b=40. Find all missing lengths and angles as well as the area correct to 1 decimal place.

*November 18, 2016*

**maths**

The level of oil in a bottle is at the 1/2-mark. More oil is poured in until it is at the 7/8- mark. What fraction of the bottle is occupied by the additional amount of oil. Pls show all working.

*November 16, 2016*

**chemistry**

arrangement of the following gas molecule in their increasing average speed at the same temperature. O2, N2, H2O,CO2,NO2 and Cl2

*November 6, 2016*

**maths**

Consider the 4 points A(1,5), B(-4,6), C(0,0), D(-12,12). Find the gradients of the lines: (a) BD

*November 3, 2016*

**Math**

it maybe 3,5,15,105

*November 2, 2016*

**URGENT ANY PhYSIcs teacher help thouroighly pls**

The coefficiant of friction between rubber tires and wet pavement is 0.5. Breaks are alllied to a 750kg car, intitally travelling at 30 m/s and the car skids to a stop. What is the magnitude and direction of the acceleration. Ik the magnitude and i kinda get how to do the ...

*October 31, 2016*

**physics**

A uniform ladder of length 20.0m and weight 750 N is propped up against a smooth vertical wall with its lower end on a rough horizontal surface. The coefficient of friction between the ladder and this horizontal surface is 0.40. (b) Work out and add the numerical values of ...

*October 30, 2016*

**Physics**

A uniform ladder of length 20.0m and weight 750 N is propped up against a smooth vertical wall with its lower end on a rough horizontal surface. The coefficient of friction between the ladder and this horizontal surface is 0.40. (b) Work out and add the numerical values of ...

*October 30, 2016*

**PHYSICS**

A uniform ladder of length 20.0m and weight 750 N is propped up against a smooth vertical wall with its lower end on a rough horizontal surface. The coefficient of friction between the ladder and this horizontal surface is 0.40. (b) Work out and add the numerical values of ...

*October 30, 2016*

**maths**

By making the substitution u=ln x show that the following equation has exactly one real-number solution: -12/ln x + ln x^4 = -9

*October 25, 2016*

**maths**

(a) Let u=7^x. Using the rules for powers show that i) 7^x-1 = u/7 and ii) 7^2x-1 = u^2/7 (b) By making the substitution u=7^x and using part (a), derive a hidden quadratic equation 7^2x-1 +4×7^x-1 - 1/14 = 0 and hence find all solutions to the above equation.

*October 25, 2016*

**maths**

(a) Solve the following equations for x where possible, giving your solutions correct to three decimal places. (i) 3^x+1 -1=5 (ii) 3×4^x =4×4^1-2x (b) Confirm that any solutions you found in part (a) are (approximately) correct by sub-situiting into the original ...

*October 25, 2016*

**maths**

Write down the sum and product of the roots of the following quadratic polynomials: (a) 3x^2 - 6x - 7 (b) 3x^2 + 6x + 7

*October 25, 2016*

**maths**

Determine the nature of the roots of the following quadratic equations: (a) 3x^2 - 6x + 7 = 0 (b) 3x^2 + 6x - 7 = 0 (c) -5x^2- x/5 = 0 (d) 4x^2 - 28/3x + 49/9 = 0

*October 25, 2016*

**maths**

Solve the simultaneous questions: (a) x+y+z=-3 (1) x-y-2z=13(2) y-4z=25 (3) (b) x+2y+3z=-14 (1) 2x+3y-z=13 (2) 3x-y+2z=-7 (3)

*October 25, 2016*

**maths**

1a) Solve the each of these equations by factorising the left hand side into a product of linear factors: (i) x^2 - 6x - 40 = 0 (ii) 3x^2 + 20x - 7 = 0 (b) For each question in part (a), check your solutions by substituting them back into the equation. 3. Solve each equation ...

*October 25, 2016*

**maths**

Write down the sum and product of the roots of the following quadratic polynomials: (a) 3x^2 - 6x - 7 (b) 3x^2 + 6x + 7

*October 24, 2016*

**maths**

Determine the nature of the roots of the following quadratic equations: (a) 3x^2 - 6x + 7 = 0 (b) 3x^2 + 6x - 7 = 0 (c) -5x^2- x/5 = 0 (d) 4x^2 - 28/3x + 49/9 = 0

*October 24, 2016*

**maths**

Solve the simultaneous questions: (a) x+y+z=-3 (1) x-y-2z=13 (2) y-4z=25 (3) (b)x+2y+3z=-14 (1) 2x+3y-z=13 (2) 3x-y+2z=-7 (3)

*October 24, 2016*

**maths**

1a) Solve the each of these equations by factorising the left hand side into a product of linear factors: (i) x^2 - 6x - 40 = 0 (ii) 3x^2 + 20x - 7 = 0 (b) For each question in part (a), check your solutions by substituting them back into the equation. 3. Solve each equation ...

*October 24, 2016*

**history**

Article I, Section 8 of the U.S. Constitution grants Congress the power to do all of the following EXCEPT ____.

*October 11, 2016*

**Jefferson**

A car is traveling at 40 miles per hour. Write a rational expression that gives the time that it takes the car to travel Upper M miles.

*October 10, 2016*

**Math**

How do I arrange these in order from the smallest to greatest 5/6, 7/12, 5/8, 23/48

*October 7, 2016*

**Algebra**

Which property is illustrated by the following statement? 2(-3/9)=(-3/9)2 A. Associative property of addition. B. Commutative property of multiplication. C. Inverse property of multiplication. D. Commutative property of addition.

*September 30, 2016*

**Algebra**

Which property is illustrated by the following statement? 2(-3/9)=(-3/9)2 A. Associative property of addition. B. Commutative property of multiplication. C. Inverse property of multiplication. D. Commutative property of addition.

*September 30, 2016*

**Algebra**

Which property is illustrated by the following statement? 2(-3/9)=(-3/9)2 A. Associative property of addition. B. Commutative property of multiplication. C. Inverse property of multiplication. D. Commutative property of addition.

*September 29, 2016*

**Algebra**

Which property is illustrated by the following statement? 2(-3/9)=(-3/9)2 A. Associative property of addition. B. Commutative property of multiplication. C. Inverse property of multiplication. D. Commutative property of addition.

*September 28, 2016*

**Algebra**

Which property is illustrated by the following statement? 2(-3/9)=(-3/9)2 A. Associative property of addition. B. Commutative property of multiplication. C. Inverse property of multiplication. D. Commutative property of addition.

*September 28, 2016*

**math**

each student needs 2/5 of a cup of play dough to build a house. How many cups of play dough are needed for 9 students?

*September 22, 2016*

**science**

how much force is needed to accelerate a 7.1 kg skier at 4 m/s/s?

*September 13, 2016*

**Government**

1. Which of the following is true about the formal amendment process for the Constitution? A. Only citizen may propose an amendment. B. Only Congress may propose an amendment. C. Both houses of Congress may pass a resolution to propose an amendment. D. The president can Vito ...

*September 12, 2016*

**Geometry**

Do you go to Connections academy in the 10 th

*September 6, 2016*

**American government**

That's your problem. Get your own amswers and stop trying to cheat.

*September 1, 2016*

**math**

Indira reacts that the actual difference of 19-7.82 will be greater than the estimate of 19-8=11.Is Indira correct?Explain how Indira might have arrived at the prediction without subtracting the actual numbers.

*August 24, 2016*

**English**

Robert Borden

*August 12, 2016*

**6**

The pet store aquarium holds 32 fish. Today 13 angelfish and 19 are clownfish to the total number of fish in the aquarium

*August 8, 2016*

**Calculus AB**

A rectangle is inscribed in a right triangle with legs of length 5 and 12. The sides of the rectangle are parallel to the legs of he triangle. Find the dimensions of the rectangle that has the largest area?

*July 30, 2016*

**Calculus AB**

A 5.5 foot man walks away from a 12 fokt lampost at a constant speed. At a given moment, let l be the length of the man's shadow (along the ground) and ket x be his distance from the lampost. Sketch a figure that represents the problem Express l in terms of x

*July 30, 2016*

**Calculus AB**

The height h of a closed cylindical tank is 4 times longer than he radius r. Write the volume of the tank as a function of r. Write the total surface area of the tank in terms of h.

*July 30, 2016*

**Calculus AB**

Water pours at a constant rate into a conical tank of height 10 feet and radius 4 feet. Let V, h and r be the volume, height, and radius if the water in the tank at a particular time t. Express the volume of the water in the tank at any time t as a function of h only.

*July 30, 2016*

**Calculus AB**

Let f be the function that is given by f(x)=(ax+b)/(x^2 - c). It has the following properties: 1) The graph of f is symmetrical with respect to the y-axis 2) The graph of f has a vertical asymptote at x=2 3) The graph of f passes through the point (-1,3) Determine the values ...

*July 30, 2016*

**Calculus AB**

Theta is an angle between the lines L1 and L2 with the slopes m1 and m2. Prove that tan theta= (m2 - m1)/(1+m2m1).

*July 30, 2016*

**Calculus AB**

If r and s are roots of the pokynomial equation x^2 + bx + c, show that b=-(r+s) and c=rs

*July 30, 2016*

**Calculus AB**

Solve graphically (x-2)^3(x+4)(3-x)^2(x+1)^4 <0

*July 30, 2016*

**Calculus AB**

A hiker walks due east for 40 minutes, then changes course by going South 25 degrees West. After 20 minutes, he changes course again, this time at South 75 degrees East. He goes through this path for one hour after which he heads north reaching his final destination in 15 ...

*July 30, 2016*

**Calculus AB**

One of the equal angles of an isosceles triangle is 55 degrees. If the base is 20 cm, what is the perimeter and the area?

*July 30, 2016*

**Calculus AB**

Thanks a bunch. And I got 4.967 meters as the final answer based off of what you gave me.

*July 30, 2016*

**Calculus AB**

From a height of 10 meters in the third floor of an apparent that building, the angle of depression of two cars moving on the same lane and in the same lane and in the same direction measure 29.5 degrees and 38.2 degrees. How far are the two cars from each other? This ...

*July 30, 2016*

**Calculus AB**

What is an algebraic expression for cot(arccos ((x+1)/2)?

*July 30, 2016*

**Calculus AB**

Without using a calculator, what is the exact value of sec(arctan(12/5)) - sin(arccot(3/4))

*July 30, 2016*

**Math CSET**

A student scores 96 on a test. The class average is 84, with a standard deviation of 4 points. What percentage of the class scored below this student? I understand the 96-84/4 part to obtain a z-score of 3. What I do not understand is, if I do not have access to a z-score to ...

*July 21, 2016*

**Maths**

if a spinner is divided into 6 equal parts ,when it's spun, what is the probability of spinning on 4?

*July 13, 2016*

**Physics**

You jump across and down a crevasse from rest. You land on the other side at a speed of 10.5 m/s directed 67.6° below the horizontal. The other side is 4 meters lower. How wide was the crevasse? No Idea if I am doing this right. But so far what I done was 10.5Sin(67.6...

*July 5, 2016*

**Physics**

You jump across and down a crevasse from rest. You land on the other side at a speed of 10.5 m/s directed 67.6° below the horizontal. The other side is 4 meters lower. How wide was the crevasse? No Idea if I am doing this right. But so far what I done was 10.5Sin(67.6...

*July 5, 2016*

**physics**

one cubic meter of water hass a mass of 1.0x10^-3. (a) determine the mass of 1.0 m^3. (b) assu!ing biological substance are 98% water, estimate the mass of cell with a 1.0 micrometer dia!eter, a human kidney and a fly. assume a kidney is roughly a sphere with radius of 4.0 cm...

*June 18, 2016*

**Physics**

16.8seconds

*June 12, 2016*

**Physics**

16.8mm

*June 12, 2016*

**Physics**

A 10 kg block is towed at a 30° incline with respect to the horizontal the rope is parallel to the incline and has attention 100 N assume that the block starts from rest at the bottom of the hill and neglect friction how fast is the block moving after 40 m up the hill

*June 8, 2016*

**pre-algebra**

is (-1, 5) a solution to 2 x = y - 7 and 2 y = - x + 9

*May 24, 2016*

**IT**

why is system Burn-in important?

*May 15, 2016*

**math**

Find dy/dx and d2y/dx2. x = e^t, y = te^t

*May 2, 2016*

**Life orientation**

Describe the three human rights violations

*April 17, 2016*

**English**

As the world influence shift so will the language. To teach a language is to aid communication between individuals. Its not whether there is a right or wrong. For example there can be a mathematical language with its own vocabulary that allows mathematicians to communicate ...

*April 14, 2016*

**social studies**

What they are referring to is the battle at the Alamo which is in San Antonio TX. During this time a 100 Texas soldiers fought against approximately 1,500 Mexican soldiers. The did loose however after 10 DAYS, they had killed or injured more then 600 Mexican Soldiers. From ...

*April 14, 2016*

**PHYSICS**

please show step by step!

*April 14, 2016*

**PHYSICS**

Point A is 2.0 meters away from a charge of -3.o(Mu) and 3.0 meters away from a charge of +1.5(Mu) as shown. A) Find the net Electric field at point A B) Find the total electric potential at point A Answer This Question

*April 14, 2016*

**Physics**

A 1.4 kg box that is sliding on a frictionless surface with a speed of 10 m/s approaches a horizontal spring. The spring has a spring constant of 2000 N/m. (a) How far will the spring be compressed in stopping the box? (b) How far will the spring be compressed when the box'...

*April 10, 2016*

**factoring polynomiald**

8b(2power)+ 6b +1=

*April 10, 2016*

**science:chemistry**

magnesium trioxocarbonate (IV) decomposed according to the equation MgCO3(s) -MgO2(s) + CO2(g).if 6.0g of magnesium trioxocarbonate (IV) is completely decomposed ,calculate :i. the mass of carbon (IV) oxide produced

*April 6, 2016*

**Physical science 7th grade**

What is the internal structure of the cavefish and the minnow suggest common ancestry?

*April 2, 2016*

**He**

which organ is part of both the respiratory and digestive systems

*April 1, 2016*

**Health**

the main parts of the central nervous system consist of the brain and the

*April 1, 2016*

**Health**

why does the blood returning to the heart have very little oxygen in it

*April 1, 2016*

**Math**

If the ratio of red cars to Blue Cars is 3 to 5 and there are 55 blue cars how many red cars are there?

*March 30, 2016*

**owens**

i need help in writing an essay for more details- bit.ly/21OERpv written in APA style

*March 29, 2016*

**Check My Answer! :)**

What is the surface area of the square pyramid if the altitude is 4 cm, the length is 6 cm, and the height is 5 cm? a. 48 cm^2 b. 144 cm^2 c. 156 cm^2 d. 96 cm^2 i think the answer is 144 cm^2. Please show me how you did the work so then i know that i at least got partial ...

*March 29, 2016*

**Chemistry**

What is the total mass of KNO3 that must be dissolved in 50 g of water at 60 degree C to make a saturated solution?

*March 22, 2016*

**mathematics**

A train takes 5mins to cover a distance of 3km between two stations P and Q. Starting from rest at P, it accelerates at a constant rate to a speed of 40km per hour and maintains this speed until it is uniformly brought to rest at Q. If the train takes three times as long to ...

*March 14, 2016*