Saturday
December 10, 2016

Posts by joe

Total # Posts: 2,505

algebra
Solve the problem. The pressure of a gas varies jointly as the amount of the gas (measured in moles) and the temperature and inversely as the volume of the gas. If the pressure is 1170 (kiloPascals) when the number of moles is 6, the temperature is 260 kelvin , and the volume...
December 8, 2016

Social studies please help
The answers are B and C
December 5, 2016

Math
Jamilla is throwing a small party she has 4 pizza and decides that everyone at her party should have a serving of 3/5 of a pizza jamilla says she has a 6 2/3 servings but Devon says she has 6 2/5 servings who is correct and how many slices does each person get
December 2, 2016

Math
Diana and Jonah ordered at pizza Diana at 2/5 of the pizza and Jonah ate 1/3 of the remaining pizza if there were 10 slices to begin with how many slices were uneaten
December 1, 2016

Geometry
Use algebra to classify quadrilateral JKLM. Select all the apply. -Trapezoid -Kite -Square -Rhombus -Rectangle -Parallelogram Point J (2,1) Point K (8,-1) Point L (2,-6) Point M (-4,-4)
November 29, 2016

math
how many pairs of numbers between 1-100 has LCM less or equal to 20?
November 28, 2016

Mathmatics help please
a and b are two positive intergers which are greater than 5. The hcf of a and b is 5. The lcm of a and b is 75. What is a and b. Thank you.
November 26, 2016

maths
Using trigonometric ratios find the remaining side lengths and angle measurements to 2 decimal places each: (a) ? = 35°, ? = 90°, a = 30 (b) ? = 90°, b = 7, c = 6 (c) a = 33, b = 56, c = 65
November 18, 2016

Marh
A carpenter divides a board that is 3.5 inches wide into four pieces of equal width by cutting it in three places what is the finished width of each piece?
November 17, 2016

Chemistry
Elemental analysis of a compound, once used as a pesticide, was found to be 74.2% carbon, 8.64% hydrogen, and 17.2% nitrogen. This compound has a molecular mass of 162.23g/mol, what is the molecular formula for this compound?
November 15, 2016

physics
A body is in equilibrum when three forces act on it.Two of the forces are F1 of magnitude 8Newtons acting due east and F2 which is 5Newtons acting 060. find the magnitude and direction of the third force.
November 15, 2016

maths
Two vectors P and Q of magnitudes 5 and 3 units respectively are inclined at an angle of 30 to each other.calculate the component of the resultant in the direction of Q.
November 15, 2016

Chemitry
Consider the neutralization reaction that takes place when hydrochloric acid reacts with aqueous calcium hydroxide Write a conversion factor that relates moles of hydrochloric to moles of calcium hydroxide for this reaction
November 14, 2016

Chemistry
Potassium chlorate, KCIO3, acts as an oxidizing agent in matches, explosives, flares, and fireworks. In the equation below, it is formed from the element chlorine and potassium hydroxide. 3 Cl2+ 6KOH=KCIO3+5KCL+3H2O Write a conversion factor that could be used to convert ...
November 14, 2016

Chemistry
In 1985 benitoite became the California "state gemstone." Found only in a tiny mine near Coalinga, California, it is a silicate of barium and titanium with trace impurities that cause a range of hues from colorless to blue to pink. Its general formula is BaTi(SiO3)3...
November 14, 2016

Chemistry
Normal glucose levels in the blood are from 70 to 110 mg glucose per 100mL of blood. If the level falls to low, there can be brain damage. If a person has a glucose level of 92 mg/ 100mL, what is the total mass of glucose in grams in 5.10 L of blood?
November 13, 2016

Math
Vector u has a magnitude of 5 units, and vector v has a magnitude of 4 units. Which of these values are possible for the magnitude of u + v? There is more than one answer... 1 9 11 13
November 3, 2016

math
My 3-digit number has a 4 in the hundreds place. It has a greater digit in the tens place than the ones place. The sum of the digits is 6. What is my number?
November 1, 2016

history
Thank you Anonymous you got me a 100%.
November 1, 2016

brief calc
Calculate the total area of the region described. Do not count area beneath the x-axis as negative.Bounded by the line y = 6x, the x-axis, and the lines x = 4 and x = 5
October 31, 2016

Physics Help!
.342m/s at 43 degrees to the right
October 25, 2016

algebra
94 * .06 = the first hour times that number by 4
October 24, 2016

Algebra
In a rectangular room 10 feet wide 40 feet long and 50 feet high there are four Windows each 30 inch by 48 inches what is the ratio of Windows Surface 2 floor area in this room?
October 20, 2016

physics
a 1000 kg truck traveling at a speed of 40m/s skids to a halt on wet concrete where µk = 0.60. how long are the skid marks? (Please explain all variables and equations I'm clueless in this subject) I keep trying to use the equation I found online: d= v^2/2ug but I do...
October 20, 2016

Chemistry
When 13.0 grams of acetylene, C2H2, is reacted, what mass of water, H2O, is produced?
October 18, 2016

Science
If a wave has a frequency of 10 Hertz, what does this mean? Thanks.
October 18, 2016

Physics
pressure is force per area in a high wind the increased pressure inside of a skyscraper can be up to 29 lbs/ft2. calculate the wind load in pounds on the windward side of a 150 ft wide, 850 ft tall building. How much is this in newtons?
October 16, 2016

algebra homework help
blah
October 12, 2016

Algebra
A person car uses 5gal. Of gas to travel 132 miles.He has 3 gal. Of gasoline in the car,and he wants to know how much more gasoline he will need to drive 300 miles.
October 11, 2016

physics
South Carolina WR Alshon Jeffery destroys the defense and makes the catch on the Hail Mary pass and dives into the endzone for the TD. (Intermediate Level) Assuming he ran at a constant velocity what is the minimum velocity Alshon would have had to run in order to make it to ...
October 6, 2016

Communications
I completed my assignment, but I need someone to check the answers, please. This is counting as a test and due tomorrow! Word bank: A. Interactional identity B. positive or solidarity face C. Master identity D. Personal identity E. Romantic self F. Third person G. Modernist ...
October 3, 2016

Social Studies
b and d
October 3, 2016

physics
if someone walks 1.5 km west then 2.5 km 30 degrees south of east then 1.5 km 40 degrees north of east. Starting at the same point, what would be the angle to get someone straight from the starting point to where the other person ended??
October 3, 2016

Strategic Management
1. Ryanair, Wal-Mart, Timex, Casio and Hyundai are all cited as examples of firms pursing cost leadership strategies, but these firms make substantial investments in advertising, which seems more likely to be associated with a product differentiation strategy. Are these firms ...
September 30, 2016

math
Tony invests $3900 in two different accounts. The first account paid 6 %, the second account paid 8 % in interest. At the end of the first year he had earned $280 in interest. How much was in each account?
September 29, 2016

math
B) A random sample of 16 mid-sized cars tested for fuel consumption gave a mean of 26.4Kilometers per liter with a standard deviation of 2.3 kilometers per liter. i) Assuming that the kilometers per liter given by all mid-sized cars have a normal distribution, find a 99% ...
September 26, 2016

math
A) Daily sales of petrol from the Nabua service station are normally distributed with Mean6300Landthe standard deviation 400L. (i) If a daily sale is selected at random, find the probability that it is less than 6200L. (ii) If petrol sales are sampled for 40 days, and the ...
September 25, 2016

alg 2
Two trains whose rates differ by six miles per hour start at the same time from stations that are 273 miles apart. They meet in three and a half hours. Find the rate of each train.
September 25, 2016

Algebra
Verify the solution by choosing the correct coordinate point whic states 3x-2y=2 5x-5y=10 Answer choices: (0,-1) (-4,-2) (-2,-4) (1,-5) Thanks for the help
September 19, 2016

Social studies
Is it province
September 12, 2016

Social studies
What is the basic independent unit of the world politics. A county B province C nation D organization****
September 12, 2016

Math
What is the basic independent unit of the world politics. A county B province C nation D organization****
September 12, 2016

chemistry
How many grams of nacl are required to completely neutralize 100 ml of 1M h2so4?
September 8, 2016

Math
When -24 + 7i is converted to the exponential form re^{i \theta}, what is cos(theta)?
August 23, 2016

Math
one person takes up about 2.5 square feet of space. use this value to estimate how many people can fit in an area that is 120 feet wide and 300 feet long.
August 15, 2016

Math precalculus
Let z and w be complex numbers such that |z| = |w| = 1 and zw does not equal -1. Prove that (z + w) / (zw + 1) is a real number. I have tried to rationalize the denominator and I got (z^2*w-z*w^2) / (zw)^2-1 but that got me nowhere. Can someone please help me!!!
August 15, 2016

Math
Never mind I got it
August 5, 2016

Math
Convert ( 4, -pi/6) from polar coordinates to rectangular coordinates. I got sqrt 12, -2 as my answer but it said this was wrong. I checked multiple times and I don't see where I messed up
August 5, 2016

Math
Whoops bad math:) Thanks!
August 3, 2016

Math
It says that -2/3 is wrong
August 3, 2016

Math
The graph of r = 7/ (3 cos(theta) + 2 sin(theta)) is a line. What is the slope of the line? How do you do this!!!
August 3, 2016

Maths
Prove That If the equation x^2+ax+b=0 and cx^2+2ax-3b=0 have a common root then b=5a^2(c-2)/(c+3)^2
July 24, 2016

Math
Please Help A body consists of a solid hemisphere of radius r joined to a right circular cone of base radius r and perpendicular height h. The plane surfaces of the cone and hemisphere coincide and both solids are made of the same material. Show that the centre of gravity of ...
July 24, 2016

physics
A girl sees her image in a shiny glass sphere tree ornament that has a diameter of 18 cm. The image is upright and is located 2.9 cm behind the surface of the ornament. How far from the ornament is the child located? The child is located cm in front of the ornament.
July 18, 2016

physics
A power transmission line is made of copper that is 1.8 cm in diameter. If the resistivity of copper is 1.725 10-8 Ω · m, find the resistance of 7 mi of the line.
July 7, 2016

physics
A copper wire that has a diameter of 2.9 mm carries a current of 39.0 A. Assuming that each copper atom contributes one free electron to the metal, find the drift velocity of the electrons in the wire. The molar mass of copper is 63.5 g/mol and the density of copper is 8.95 g/...
July 6, 2016

Physics
During a thunderstorm, a lightning bolt carries current between a cloud and the ground below. If a lightning bolt transports a total charge of 80 C in 0.001 s, what is the magnitude of the average current? A
July 6, 2016

Physics
A stone is dropped from the root of a building. A person in the building observes that the stone crosses his window that is 2 meters tall in a time of 0.2 second. How far is the roof from the top of the window?
June 30, 2016

physics
A cyclist is on a rolling stationary trainer pedaling such that his wheels are traveling at 30 km/h. He has an unfortunate incident and ends up falling over 90° on his side onto a large patch of ice. Given the cyclist and bicycle have an 4.5 kg*m^2, find the angular ...
June 30, 2016

Math
bob is a genius!!!
May 31, 2016

physics
A dolphin wants to swim directly back to its home bay, which is 0.800 km due west. It can swim at a speed of 3.58 m/s relative to the water, but a uniform water current flows with speed 2.95 m/s in the southeast direction.
May 29, 2016

Math
The heights of Japanese maple trees are normally distributed with a mean of 6 meters and a standard deviation of 0.2 meter. What percent of Japanese maple trees are between 5.5 meters and 6.7 meters tall?
May 25, 2016

math
-9?
May 20, 2016

MATH FACTORING
10x^2+615x+20125 FACTOR PLS
May 20, 2016

Pre- algrebra
2. D 3. B Combine like terms..
May 20, 2016

Math
What's nine minus three divided by a third plus one
May 15, 2016

Math
Same person i know the answer to the first part is 1260. I don't know how many teams will have Alex.
May 12, 2016

Math
In how many ways can a team of 5 players and a coach be chosen from 10 players and 5 coaches? How many of these teams will contain Alex, one of the player?
May 12, 2016

Math
In how many ways can a committee of 12 people, of which 5 must be in the 21−30 age group, 4 must be in the 31−40 age group and 3 must be in the 41−50 age group, be chosen if there are 6 people of each age group?
May 12, 2016

Math
In a card game player get at the start 2 green cards, 3 blue cards, 4 red cards, and 3 yellow cards. In how many ways can the player get cards at the start if this card game has 7 green, 7 blue, 10 red and 10 yellow cards?
May 12, 2016

Math
John has travel 630 miles. The car does 27miles per gallon. The car has a 9 gallon tank. How many times will he have to fill up.
May 12, 2016

Bio- HELP?
herbiovres
May 5, 2016

Exponential Modeling
Suppose a tortoise is 2000 feet from the ocean. Each day the tortoise travels one-half of the remaining distance to the ocean. Use this information to: Compute the remaining distance to the ocean after 4 days of travel.
May 1, 2016

Exponential Modeling
Atmospheric pressure decreases by about 12% for every kilometer you climb. The pressure at sea level is about 1013 atmospheres. How many atmospheres of pressure will you feel at 8.848 km?
May 1, 2016

Exponential Modeling
A species of frog’s population grows 24% every year. Suppose 100 frogs are released into a pond. How many frogs will there be in 5 years?
April 30, 2016

math
The Davidson family wants to expand its rectangular patio, which currently measures 15 ft by 12 ft. They want to extend the length and width the same amount to increase the total area of the patio by 160 ft2. Which quadratic equation best models the situation? A = lw (15)(12...
April 29, 2016

World History
Can somebody check over my answers my answers are : B;C;B;A;D;C;A;B;D;C;A;B;B;B;C;D;A;A;B;C;… C;D;1. Trench warfare caused the immobilization of troops on the (1 point)Western Front.Middle Eastern desert.Eastern Front.mountains in Russia.2. After the war, Britain ruled ...
April 20, 2016

Social Studies
Actually I like C
April 15, 2016

Social Studies
The Northwest Ordinance established all of the following, except rules for territories to become states. denying slavery to new states formed from the territory. preventing new states from entering the United States. the right to education (------my choice
April 15, 2016

Physics
A geostationary satellite orbits the Earth in such a manner that it is always directly above the same point on the equator as the Earth rotates. Assuming that this orbit is circular, what is its radius? (The mass of the Earth is approximately 5.97 × 1024 kg and the ...
April 15, 2016

chemistry
how many protons and electrons are in 7.4 grams of hydrogen?
April 13, 2016

Statistics
If a normally distributed group of test scores have a mean of 76 and a standard deviation of 10. Find the probability that student will earn a grade between 65 and 85
April 9, 2016

Math
Let $f(x) = \dfrac{2-3x}{5-2x}$. For what value of $a$ is $f(a) = 3$? Thanks!
April 3, 2016

Math
Let f(x) = 2-3x/5-2x. For what value of a is f(a) = 3?
April 3, 2016

Math
210 litres divided by 2 then divided by 2.5l per minute =42
March 30, 2016

Math
Given the points (A) 0,0 (B) 4,3 (C) 2,9 what is the measure of angle ABC
March 30, 2016

Math
If a square is 8.4 feet on each side. How many square feet is it
March 28, 2016

Chemistry
In a 1.0× 10–2 M solution of CH3NH3Br(aq), identify the relative molar amounts of these species. H2O, OH-, CH3NH3+, CH3NH2, H3O+, Br-, HBr
March 28, 2016

reading comprehension
C. JIM IS PENNYS GRANDFATHER
March 21, 2016

Physics
A 40.0 ohm resistor, 20.0 ohm resistor, and a 10.0 ohm resistor are connected in series across a 220-V supply. Which resistor is the warmest? a. 40.0 ohm b. 20.0 ohm c. 10.0 ohm d. they are all the same
March 18, 2016

Math
An object is launched at 9.8 meters per second from a 73.5-meter tall platform. The object's height s (in meters) after t seconds is given by the equation s(t)= -4.9t(-4.9t) - 9.8t = 73.5. When does the object strike the ground? I can't figure out how to factor it ...
March 11, 2016

Math
A woman bought some 13 cent stamps and some 8 cent stamps at the posg office. She spent exactly 1 dollar. How many of each stamp could she have bought?
March 11, 2016

Math
If sales tax in a specific county is 6.5%, what is the total price paid on a purchase of $156.00.
March 8, 2016

CHEMISTRY HELP
assume that 13.5g of AL react with excess HCl according to the following balanced equation, at STP: 2Al(s) + 6HCl(aq) ---> 2AlCl3 + 3H2(g) how mang liters of H2 at STP are produced?
March 6, 2016

Physics
Thank you!
March 3, 2016

Physics
A circuit consists of a 10 ohm resistor in series with 3 identical batteries each with an emf = 1.0V and internal resistance of 5 ohms. a) find potential difference between the terminals b) potential difference across the 10 ohm resistor c) power dissipated in resistor
March 3, 2016

Science
Calculate the amount of heat required to completely convert 1kg of water at 0°C to the boiling point at 100°C?
February 23, 2016

algebra or algebra1
500.04
February 21, 2016

algebra
A hotel swimming pool measures 25 m by 9m. The hotel manager wants to put a 3m wide deck around the pool. Calculate the area of the deck
February 19, 2016

Calculus
Find the length of the entire perimeter of the region inside r=5sin(theta) but outside r=1. 1=5sin(theta) theta=arcsin(1/5) r'=5cos(theta) I tried the integral between arcsin(1/5) and pi-arcsin(1/5) of (((5sin(theta))^2+(5cos(theta))^2))^1/2 which gives me 13.694 Webworks...
February 19, 2016

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