Friday

August 28, 2015
Total # Posts: 918

**Physics**

You just need to calculate Jane's kinectic energy before she grabs the vine (.5mv^2). This will be equal to her gravitational potential energy (mg*height) at the top of her swing. .5mv^2=mgh -cancel the mass on both sides .5v^2=gh 19.22=9.8h h=1.96
*October 24, 2011*

**physics**

objects of masses m1=4 kg and m2=9kg are connected by a light string that passes over a frictionless pulley. the object m1 is held at rest on the floor and m2 rests on a fixed incline of delta=40 degrees. the objects are released from rest and m2 slids 1.00 m down the ...
*October 23, 2011*

**physics**

A falling skydiver has a mass of 123 kg. (a) What is the magnitude of the skydiver's acceleration when the upward force of air resistance has a magnitude that is equal to one-fourth of his weight? 7.35 m/s^2 (b) After the parachute opens, the skydiver descends at a ...
*October 21, 2011*

**Physics**

A box is sliding up an incline that makes an angle of 12.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.30 m/s. How far does the ...
*October 21, 2011*

**Algebra 2**

Factor. -16 + 17(5-y²)-(5-y²)² and [x + y + 1][x² - x(y + 1)+(y + 1)²
*October 20, 2011*

**Algebra 2**

Factor. (y-1)⁴ - (y-1)²
*October 20, 2011*

**Algebra 2**

Factor.
*October 20, 2011*

**Algebra 2**

1/16(x)^3a + 1/2(y)^(6a)(z)^(9b)
*October 20, 2011*

**Algebra 2**

Factor. 2x⁴ + x³ + 2x² + 4x - 24
*October 20, 2011*

**physics**

fuk u
*October 19, 2011*

**Algebra 2**

Solve for x. x³ + ax² - a²x - a³ = 0
*October 18, 2011*

**Algebra 2**

Solve for x. 2x² - 5bx + 4cx - 10bc = 0
*October 18, 2011*

**simple math**

1:3 and 1:2 Which one is a larger ratio? What does it mean for a ratio to be larger or smaller? Thank you.
*October 18, 2011*

**English**

Can anyone check this text and if there are any mistakes, fix it? I am writing to complain about the advertisement for your new game. I just played the game and then i realised that the advertisement is misleading. You say there are big cash prizes and averyone can win it. In ...
*October 16, 2011*

**physics**

can i get thé answer please
*October 12, 2011*

**math**

a kid with a baseball cap is playing catch with himself by trowing a ball straight up how fastdoes he throw the ball if it comes back to his cap in0.8 seconds later
*October 9, 2011*

**Statistics**

Calculate the mean and standard deviation of the probability distribution created by rolling a dice. Either show work or explain how your answer was calculated.
*October 9, 2011*

**Algebra 2 (Diophantine Equations)**

Solve 5x + 12y = 47 using Diophantine equations.
*October 7, 2011*

**math**

A pie plate measures 8 inches across the bottom. What is the area of the bottom of this pie plate?
*October 6, 2011*

**Algebra 2 (Linear Diophantine Equation) **

31x + 8y = 180
*October 6, 2011*

**Algebra 2 (Diophantine Equation)**

7x + 16y = 225 Solve using Diophantine equations.
*October 6, 2011*

**Algebra 2 (Diophantine Equations)**

Find all positive integer solutions for 13x + 9y = 190 using Diophantine equations.
*October 5, 2011*

**Algebra 2 **

At a county fair, adults' tickets sold for $5.50, senior citizens' tickets for $4.00, and children's tickets for $1.50. On the opening day, the number of children's and senior's tickets sold was 30 more than half of the number of adults' tickets sold. ...
*October 5, 2011*

**Algebra 2 **

At a county fair, adults' tickets sold for $5.50, senior citizens' tickets for $4.00, and children's tickets for $1.50. On the opening day, the number of children's and senior's tickets sold was 30 more than half of the number of adults' tickets sold. ...
*October 5, 2011*

**Algebra 2 (Linear Programming)**

Part A requires 4 hours per unit on a lathe and 3 hours per unit on a milling machine. Part B requires 2 hours per unit on a lathe and 5 hours per unit on a milling machine. 52 hours are available on the lathe and 60 hours are available on the milling machine. If the profit ...
*October 5, 2011*

**Algebra 2 (Distance Problem)**

A train leaves Union Station for Central Station, 216 km away, at 9 A.M. One hour later, a train leaves Central Station for Union Station. They meet at noon. If the second train had started at 9 A.M., and the first train at 10:30 A.M., they would still have met at noon. Find ...
*October 5, 2011*

**math**

decimal number patterns rules 4.8, 9.6, 8.9, 17.8, 17.1
*October 4, 2011*

**Algebra 2 (Linear Programming)**

A bicycle builder makes two models. The basic model requires 2 hours of frame construction, 4 hours of assembly, and 1 hour of finishing. The deluxe model requires 3 hours of frame construction, 3 hours of assembly, and 2 hours of finishing. Each day 36 hours are available for...
*October 4, 2011*

**Algebra 2 (Linear Programming)**

The Carbon coal company has 2 mines, a surface mine ad a deep mine. it costs $200 per day to operate the surface mine and $250 to operate the deep mine. Each mine produces a medium grade and a medium-hard grade coal, but in different proportions. This surface mine produces 12 ...
*October 4, 2011*

**Algebra 2 (Linear Programming)**

An airline will provide accommodations for a minimum of 2000 first-class, 1500 tourist, and 2400 economy-class passengers. Airplane P-1 costs $12,000 per miles to operate and can accommodate 40 first-class, 40 tourist, and 12 economy-class passengers. Airplane Q-2 costs $10,...
*October 4, 2011*

**Algebra 2**

A bicycle builder makes two models. The basic model requires 2 hours of frame construction, 4 hours of assembly, and 1 hour of finishing. The deluxe model requires 3 hours of frame construction, 3 hours of assembly, and 2 hours of finishing. Each day 36 hours are available for...
*October 4, 2011*

**Algebra 2**

Is this system of equations inconsistent? Is it dependent? x = 3y + 4 6y = 2x - 6
*October 3, 2011*

**math**

If it is the whole entire top over 2 then its different. -> Multiply by 1/2, which will cancel out the denominator. Then it will leave you with: 9x + 6 - 4x = 8 5x + 6 = 8 5x = 2 x = 2/5
*October 3, 2011*

**math**

* Multiply 2 with 8 to get rid of the 2. 9x + 6 - 4x = 16 5x + 6 = 16 - 6 = -6 _________________ 5x = 10 x = 2
*October 3, 2011*

**Algebra 2**

Solve using linear combinations. x - 5y = 6 3x + 4y = 18 What are linear combinations?
*October 3, 2011*

**math**

"I think we can say that the father is 24 years older than John, regardless of how old they are. If J represents John's age now, then 3J represents John's father's age. This is equal to J+24, so we set an equation 3J = J + 24 2J = 24 J = 12, 3J = 36 John is 12...
*October 2, 2011*

**Algebra 2**

Shouldn't it have 4 points due to 4 vertices?
*October 2, 2011*

**Algebra 2**

Find the coordinates of any vertices formed. 3x + 4y ≥ 12, 5x + 6y ≤ 30, and 1 ≤ x ≤ 3. I tried graphing this, which formed a parallelogram, but it was hard to find eyeball vertices.
*October 2, 2011*

**Algebra 2**

How many set solutions are there for this problem 33x + 103y = 6526? The solution cannot contain negative integers or decimals and fractions.
*September 30, 2011*

**math**

This is a riddle, and I'm supposed to find a 5-digit number from it..... My thousand's digit is the first that is perfect, but if you're not happy with that, it's also the product of the first two primes. My units digit is the odd of those two primes, and if ...
*September 30, 2011*

**Diophantine Equations (Algebra 2)**

A box contains two sizes of bolts. The small size weighs 33 grams. The large size weighs 103 grams. The total weight of the bolts is 6526 grams. How many of each size are there? Can you write and solve it with Diophantine Equations.
*September 30, 2011*

**English**

"The Scarlet Ibis" interpretive essay help. Directions: James Hurst, the author, makes the observation that "pride is a wonderful, terrible ting, a seed that bears two vines, life and death." These words are central to the meaning of the story. The phrase ...
*September 30, 2011*

**Math**

i think 82 is the answer.
*September 30, 2011*

**Algebra 2**

The tens digit of a two-digit positive integer is 2 more than three times the ones digit. If the digits are interchanged, the new number 13 less than half the given number. Find the given integer. (Hint: Let x = tens-place digit and y = ones-place digit, then 10x + y is the ...
*September 30, 2011*

**math**

Tony and Tom are brothers.This year both of their ages are prime numbers. Last year both of their ages were composite numbers. Both of their ages will be composite numbers again over the next three years. If Tony and Tom are both teenagers, how old are they now?
*September 29, 2011*

**math/science**

this is the only information we have been given. hope someone can help.
*September 29, 2011*

**math/science**

Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of heart disease increased...
*September 29, 2011*

**biology**

Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of heart disease increased...
*September 28, 2011*

**physics**

A diver leaves the board traveling at 3.5 m/s at an angle of 75º with respect to the horizontal. What is her speed when she hits the water, 3 meters below?
*September 27, 2011*

**math**

A cube measures 2 meters on each side. What is the volume of the cube?
*September 25, 2011*

**Math**

simplify (8 – i) – (4 – i) using Complex Numbers
*September 7, 2011*

**algerbra**

if 16-b<7 then, a) b < or equal to 8 b) b > 9 c) b < or equal to 7 d) b > or equal to 7
*September 4, 2011*

**chemistry**

Q(H20)=100g x 4.18 JK-1g-1 x 30K =100 x 4.18J x 30 (Since the rest cancel each other out) Wallah
*September 3, 2011*

**geometry**

Funny, the REA's testware has this same question, ceiling dimensions 12/9 which is 108 - the light fixture diameter 2 = area 3.14=104.86 sq ft, agreed. divided by 16 sq ft per gallon = rounded 7 gallons their answer choices: $44.75 $50.20 $38.50 $42.99 am i crazy or is it ...
*August 24, 2011*

**Algebra II**

"The smallest integer divisible by 10 and 32 is 160, and the smallest integer divisible by 6 and 20 is 60. The difference between them is 100." - Princeton Review
*July 26, 2011*

**Algebra II**

I think it's C.
*July 26, 2011*

**Pre-Calc**

Let cis Θ = cos Θ + i sin Θ. Let z1 = 3 cis 25 and let z2 = 4 cis 115 Find z2^6
*July 25, 2011*

**Occ**

(x^2 +4)y = 2x
*July 25, 2011*

**Math**

Let cis Θ = cos Θ + i sin Θ. Let z1 = 3 cis 25 and let z2 = 4 cis 115 Find z2^6
*July 25, 2011*

**geometry**

You can't find out the scale factor if you aren't given any numbers for the sides of the triangles.
*July 21, 2011*

**Algebra**

If A + B = 12, and B + C = 16, What is the value of A + C? A. -4 B. -28 C. 4 D. 28 E. The answer cannot be determined from the given information.
*July 13, 2011*

**math**

each side of a square painting id 5 ft long.what is the painting area.what is the painting perimter?
*June 20, 2011*

**algebra**

use 2 as the base!, 2 raise to the power of n, where n is the number of elements in a set.
*June 11, 2011*

**algebra**

whats the fastest and most easiest way to find all the subsets in a given set?
*June 11, 2011*

**Chemistry**

How do you balance the equation when citric acid is added to NaOH?
*June 8, 2011*

**Geometry**

A solid is composed of a cube with side length 6 meters and a hemisphere with diameter 6 meters. Find the volume of the solid.
*June 1, 2011*

**Geometry**

A rectangular prism with 2 little square bases of a radius of 1m. It's height or rectangular length is 5m. Please help me find the surface area. The answer should be less than 50m².
*June 1, 2011*

**Mathematics**

Plug in d. D = the number of minutes the practice drills last "30 minutes are spent on practice drills." 20 + 30 + 10 = 60 minutes.
*June 1, 2011*

**Trigonometry**

Solve SSA: B= 12.1 degrees b= 16 a= 23.9
*May 30, 2011*

**Trigonometry**

Use Heron's formula: a=46 b= 52 c= 67
*May 30, 2011*

**Trigonometry**

verify the identity: 1-cos^2x/1-sinx= -sinx
*May 30, 2011*

**U.S. History**

True or False? "The rebels are our country men again." Is a quote that is referring to the Emancipation Proclamation.
*May 25, 2011*

**U.S. History**

True or False? General Sherman's 60 miles path of destruction was from Atlanta, Georgia to Savannah, Georgia?
*May 25, 2011*

**U.S. History**

True or False? If a soldier had a wounded arm, it would most likely be amputated during the Civil War.
*May 25, 2011*

**U.S. History**

Life for African Americans in the South changed after the Civil War because many Africans Americans...?
*May 25, 2011*

**MATH ~~**

HELP Please!! Sample autocorrelations at lag1, lag2, and lag3 denoted by r1, r2, and r3 of weekly sales of shampoo bottles was found 0.4551, 0.3376, and 0.2514. Using the criteria of your text, the maximum number (‘n’) of weeks for shampoo bottles sales to be ...
*May 25, 2011*

**physical science**

true/false All units of energy are vectors.
*May 23, 2011*

**physical science**

true /false for every action, there is an equal and opposite reaction is best defined as Newton's Third Law
*May 23, 2011*

**physical science**

true/false A lens that converges light is concave
*May 23, 2011*

**physical science**

true/false the force of friction always opposes motion.
*May 23, 2011*

**Geometry**

A square is circumscribed about a circle. What is the ratio of the area of the circle to the area of the square? A. 1/4 B. 1/2 C. 2/π D. π/4
*May 18, 2011*

**math**

Basically 41 and 17/12 minus 27 and 7/12. So it's 14 5/6
*May 18, 2011*

**math**

Basically 41 and 17/12 minus 27 and 7/12. So it's 14 5/6
*May 18, 2011*

**physics ( need answer very very soon pleaseeeee)**

how do we find out the electron charge and mass if we dont know what type it is?
*May 13, 2011*

**physics ( need answer very very soon pleaseeeee)**

a. Acceleration is a = e*E/m e is the electron charge and m is the electron mass b. Solve the equation Since the electron's velocity component parallel to the plates remains the same as when it entered, t = 0.10 m/(3*10^6 m/s)
*May 13, 2011*

**Astronomy**

In what ways do Earth and the moon move through space? How do these motions produce such phenomena as day and night, the seasons, phases of the moon, and eclipse?
*May 12, 2011*

**Astronomy**

You are correct.
*May 12, 2011*

**Physics**

Explain why objects experience a buoyant force when immersed in a fluid. How can you find the value of the buoyant force?
*May 12, 2011*

**calculus**

The distribution of the time taken to run 1000 metres by users of a treadmill in a sports centre has mean 7.2 minutes and standard deviation 2.045 minutes. 1 Choose the option that is closest to the probability that the mean time taken to run 1000 metres for a sample of 30 ...
*May 12, 2011*

**Chemistry**

Explain why carbohydrates, lipids, and proteins are important parts of a well-balanced diet.
*May 10, 2011*

**Chemistry**

so 3 to 6...
*May 10, 2011*

**Chemistry**

What is the ratio of carbon atoms to hydrogen atoms in the compound 2CH2 = C2H4? A. 1 to 9 B. 9 to 1 C. 3 to 6 F. 6 to 3
*May 10, 2011*

**Chemistry**

What is an unsaturated hydrocarbon?
*May 10, 2011*

**Chemistry**

Material X is an organic compound that mixes poorly with water and is highly flammable. Of the following choices, material X is most likely a(n): A. Carbohydrate B. Ester C. Alcohol D. Hydrocarbon
*May 10, 2011*

**Chemistry**

C5H11Oh represent... A. Amino Acid B. Organic Acid C. Alcohol D. Ester
*May 10, 2011*

**Math**

It would be mostly addition or subtraction...
*May 9, 2011*

**pre algebra**

If you wanted factored its 2(5x+37). If wanted it simplified its 10x+74. If you wanted to combine the expressions its 10x+74. If you wanted it evaluated plug in x.
*May 9, 2011*

**physics**

9216000000000
*May 5, 2011*

**physics**

A block of mass M connected to an untstretched horizontal spring of spring constant k is hit by a bullet of mass m which has a velocity V just before the collision. The bullet stays in the block. The coefficient of friction between the block and surface is b. Explain how do ...
*April 21, 2011*

**Pre-Calculus Vectors**

nvm got it
*April 18, 2011*