Thursday
July 30, 2015

Posts by haley


Total # Posts: 442

Math
(2y-3)(3y-2) A. 6y2-13y+6 B. 6y2-13y-6 C. 6y2+13y-6 * D. 6y2+13y+6 *my answer (btw the 2 next to 6y is an exponent) I think that it is C, but I want to be sure that it is correct.
May 29, 2015

Chemistry
A 1.76g sample of quinone, C6H4O2, is burned in a calorimeter whose total heat capacity is 7.854 kJ/C. The temperature of the calorimeter increases from 23.44 C to 29.14 C. What is the heat of combustion per mole of quinone? The molar mass of quinone is 108.1 g/mol. The answer...
May 20, 2015

statistics
A sample of 65 night-school students' ages is obtained in order to estimate the mean age of night-school students. x bar = 25.2 years. The population variance is 28. (a) Give a point estimate for ì. (Give your answer correct to one decimal place.) Correct: Your ...
May 14, 2015

Math
Ok, thanks so much for the help! =)
May 11, 2015

Math
What is the equation of the line that passes through the point (-2,3) and that is perpendicular to the line represented by 3x-2y=-2? A. 2x+3y=5 B. 2x+3y=7 C. -2x=3y=5 D. 3x-2y=-12 I think that the answer is D, but I am not too sure about it.
May 11, 2015

chemistry
How many grams of CuSO4 . 5H2O are needed to prepare 100ml of a 0.10M solution? Remember to change the given volume to liters and take the moles and convert them to grams via the molar mass to get grams of CuSO4 . 5H2O
April 20, 2015

Chemistry
In a chain mechanism, a reaction in which two free radicals combine to form a stable molecule would be called the A) initiation step B) termination step C) propagation step D) inhibition step E) branching step
April 7, 2015

Chemistry
If the reaction 2NO + 2H2 --> N2 + 2H2O occurred in just a single step, the overall order of the reaction would be A) 1 B) 2 C) 3 D) 4 E) 5
April 7, 2015

Chemistry
Concentration of KCl is 0.04 M and NaCl is 0.06 M
April 7, 2015

Chemistry
What would the answer be to the second part? Explain why the solubility of KHTar in the mixed KCl- NaCl solution differs from that in 0.100 M NaCl
April 7, 2015

Chemistry
It was a solubility lab for KHTar
April 7, 2015

Chemistry
As the concentration of KCl in a solution increases, the solubility of KHTar ______________ because ___________________
April 7, 2015

Chemistry
Explain why the solubility of KHTar in 0.100 M NaCl solution differs from that in pure water? Explain why the solubility of KHTar in the mixed KCL - NaCl solution differs from that in the 0.100 M NaCl.
April 7, 2015

6th grades math
Alyssa's shelves hold 31 books each. How many shelves will Alyssa need if Alyssa has 248 books?
February 8, 2015

Math
I got 555 mph but I don't know if it's correct
January 20, 2015

Math
Two trains are traveling opposite directions. One train travels at a speed of 90 mph. The second train travels at a speed of 95 mph. The 2 trains travel for three hours. How far apart are the 2 trains?
January 20, 2015

Math
This regular octagon has a side length 15.0cm. Determine the distance from one vertex to the opposite vertex, measured through the centre of the octagon. Give your answer to to the nearest tenth of a centimeter.
January 15, 2015

physics
Elephants communicate via infrasound, at frequencies as low as 11 Hz that can travel up to 9 km. The intensity of these sounds can reach 106 dB, measured a distance of 4 m from the source. a) Determine the intensity level in W/m2 of the infrasound at 4 m from the source. b) ...
December 1, 2014

physics
Assume that there is no friction between m2 and the incline, that m2 = 1.8 kg, m1 = 1.4 kg, the radius of the pulley is 0.10 m, the moment of inertia of the pulley is 3.6 kg m2, and θ = 27.0°. Mass 1 is hanging vertically while mass 2 is on the incline. After mass 2 ...
November 29, 2014

chemistry
In a constant-pressure calorimeter, 55.0 mL of 0.310 M Ba(OH)2 was added to 55.0 mL of 0.620 M HCl. The reaction caused the temperature of the solution to rise from 22.23 °C to 26.45 °C. If the solution has the same density and specific heat as water, what is ΔH ...
November 19, 2014

English
What are the answers for chapter 9? Final Check: Money Problems
November 18, 2014

Science 8A Check Answers
Thank you.
November 17, 2014

Science 8A Check Answers
Will someone please check my answers as I need lots of help in science. 1. Which of the following is an example of matter? A. leaves B. shadow C. light from the sun* D. sound 2. Which of the following is an example of a chemical property of matter? A. ability to melt B. ...
November 17, 2014

chemistry
Which of the following reactions have a positive ÄSrxn? Check all that apply. A(g) + B(g)--> C(g) 2A(g) + B(g)--> 4C(g) A(s) + B(g)--> 2C(g) 2A(g) + 2B(g)--> 3C(g)
November 2, 2014

Chemistry
Which of the following reactions have a positive ÄSrxn? Check all that apply. A(g) + B(g)--> C(g) 2A(g) + B(g)--> 4C(g) A(s) + B(g)--> 2C(g) 2A(g) + 2B(g)--> 3C(g)
November 2, 2014

chemistry
Which of the following reactions have a positive ÄSrxn? Check all that apply. A(g) + B(g)--> C(g) 2A(g) + B(g)--> 4C(g) A(s) + B(g)--> 2C(g) 2A(g) + 2B(g)--> 3C(g)
November 2, 2014

math
A pair of blocks of the mass M =30.7 kg, and 2 M are dragged over a rough, horizontal surface by two constant forces of magnitude F=98.0 N. The angle α = 22.7 ° . The blocks are displaced 7.5 m, and the coefficient of kinetic friction is 0.258. *for the normal force ...
October 15, 2014

Physics
A pair of blocks of the mass M =30.7 kg, and 2 M are dragged over a rough, horizontal surface by two constant forces of magnitude F=98.0 N. The angle α = 22.7 ° . The blocks are displaced 7.5 m, and the coefficient of kinetic friction is 0.258. *for the normal force ...
October 15, 2014

Physics
A bush baby, an African primate, is capable of leaping vertically to the remarkable height of 2.3 m. To jump this high, the bush baby accelerates over a distance of 0.14m while extending the legs. The acceleration during the jump is approximately constant. What is the ...
October 10, 2014

physics
Heather and Jerry are standing on a bridge 53m above a river. Heather throws a rock straight down with a speed of 12m/s . Jerry, at exactly the same instant of time, throws a rock straight up with the same speed. Ignore air resistance. How much time elapses between the first ...
October 9, 2014

chemistry
A solution of silver perchlorate (AgClO4) is made by dissolving 40.4 g of pure silver perchlorate and diluting it to exactly 140 ml. What is the solutions molarity? Can you just go through the steps of what I need to do? I'm so confused. Thanks
October 8, 2014

Advanced Math
I got they curl up in... I cant figure out the last word but the letters are D, E, and Y
September 14, 2014

math
Tina and Jim live 5 miles apart from each other. Tina ran from her house to Jim's house at a rate of 10 miles per hour. Jim ran from his house to Tina's house at a rate of 8 miles per hour. How far had Jim run by the time he crossed paths with Tina?
September 9, 2014

math
At a construction site, 20,000 pounds of gravel are needed to create a driveway with an area of 400 ft2. What area of driveway can be added with another 125 pounds of gravel? 25.5 ft2 312 ft2 160 ft2 2.5 ft2 5 ft2
September 5, 2014

biology
how does sugar affect anthocynins?
September 5, 2014

biology
how does light affect anthocyanins?
September 5, 2014

algebra
If 50 tickets to the concert cost a company $1,649.50, what do 4 tickets cost? A. $164.95 B. $32.99 C. $65.98 D. $98.97 E. $131.96
September 5, 2014

Math
In this case. Would you use sinA/a=sinB/b=sinC/c
August 27, 2014

Math
How do you know that?
August 27, 2014

Math
The three angles of a triangle are 105°,25°,50° . In what ratios are the sides?
August 27, 2014

Math
What do you do next?
August 27, 2014

Math
The three angles of a triangle are 105°,25°,50° . In what ratios are the sides?
August 27, 2014

math
A $15,000 debt is to be amortized in 12 equal semiannual payments at an annual interest rate of 11% on the unpaid balance. Construct an amortization table to determine the unpaid balance after two payments have been made.
June 26, 2014

Algebra 1
y=-x+10
June 1, 2014

health
With bone-strengthening activities, your feet, legs, or arms support your body's weight, and your muscles push against your bones. This helps make your bones strong. Running, walking, jumping rope, and lifting weights are examples of bone-strengthening activities.
May 21, 2014

Science (A&P)
Trace the path of food from the mouth to the large intestine and what occurs at each structure. Anything would be helpful because I am having trouble finding the answer.
May 21, 2014

Science
When a cell is infected with a virus, what is produced for future protection? i thought it was good bacteria but i don't think a cell can do that. So confused.
May 21, 2014

Algebra 2
That is 300 degrees so (1/2,square root 3/2). The cosine is (1/2). For exact value, (5 pie/3) times (180/pie). Cross multiply. Hope that helps!
May 21, 2014

Algebra
How do you find the excluded value if there is another variable or number in the denominator? Such as the equation 12(a) over a squared minus 3(a) minus 10?
May 19, 2014

chemisty
how many joules of energy are needed to change 275 g of water from 15 degrees C to steam at 100 degrees C?
May 13, 2014

Social Studies! CHECK!
What do you think the answers are?
May 6, 2014

chem
How many grams of NH3 are present in 725 mL of gas at STP?
April 29, 2014

Chemistry: Check my answers?
12 : is false everything else looks great
March 24, 2014

Education
it does not give a exact answer, it's wording is unclear.
March 12, 2014

Education
well help me out hoe
March 12, 2014

Education
In a study about kindergarten readiness, which one of the following was true? A. Group participation skills were viewed as insignificant in comparison to academic skills. B. The ability to write one's name was followed by self-control. C. The majority of teachers placed ...
March 12, 2014

education
Teachers usually ask more of this type of question even if it is NOT recommended: convergent. B. divergent. C. open-ended. D. recall.
March 12, 2014

ece
I think C
March 12, 2014

ECE
Would it be D?
March 12, 2014

Early Childhood
Agreed
March 12, 2014

Chemistry
2 NO(g) + O2 (g) <==> 2 NO2 (g) Given that Kp=7.96×1012 for the reaction above and the following starting conditions: Initial Concentrations p(NO)=0.775 atm p(NO2)=0.000 atm p(O2)=0.789 atm Determine the equilibrium concentration of NO2.
March 7, 2014

math algebra
I have a really hard problem and I need help answering it. Two trains are traveling opposite directions. One train is traveling at the speed of 90 mph. The second train is traveling at a speed of 95 mph. The two trains travel for 3 hours. How far apart are the two trains?
February 27, 2014

math algebra
The answer is 2.4 hours
February 27, 2014

math
coach kent brings 3 qt of sport drink to soccer practice each player gets the same amount of drink how many oz of the drink does each player get?
February 12, 2014

Physics
Calculate the percentage of Earth’s gravitational force on the ISS astronauts while orbiting at an altitude of 248 miles above Earth’s surface. To do this, compare the gravitational force on an orbiting astronaut to the force on the astronaut here at Earth’s ...
January 28, 2014

English 12
Explain how a word can be a morphemic noun and a syntactic adverb in the same sentence.
January 17, 2014

physics
A 17 kg child descends a slide 3.5 m high and reaches the bottom with a speed of 4.5 m/s. How much work was done by friction as the child goes down the slide?
January 15, 2014

physics
A 17 kg child descends a slide 3.5 m high and reaches the bottom with a speed of 4.5 m/s. How much work was done by friction as the child goes down the slide?
January 15, 2014

physics
A 17 kg child descends a slide 3.5 m high and reaches the bottom with a speed of 4.5 m/s. How much work was done by friction as the child goes down the slide?
January 15, 2014

statistic
Neither! The response variable used to be called the depended variable. It's also plotted along the y-axis!
January 14, 2014

EARTH SCIENCE
I have taken the exam on penn foster and 125 gallons is not the right answer!
January 7, 2014

Elementary Math
All I did was 15.4 x .7 which equals 10.78
January 2, 2014

Early Childhood Education
lol ,dang she told you!
December 11, 2013

Spanish 4
help with worksheets
December 10, 2013

math
What number must be added to make a perfect square trinomial x^2+(8/5)x
December 8, 2013

College Algebra
Pencils cost 20 cents and pens cost 50 cents. Mabel buys x pencils and y pens, spending $2.00. Write an equation in standard form with integer coefficients that relates x and y.
November 20, 2013

College Algebra
Write an equation for the amount of money, A, that we would have if we invested $25,000 at 6% per year for 5 years compounded instantaneously.
November 20, 2013

College Algebra
Write an equation for the amount of money, A, that we would have if we invested $2000 at 8% interest for 10 years compounded semiannually (twice each year)
November 20, 2013

College Algebra
Solve the System 2x-8y=20 3x-12y=30
November 20, 2013

College Algebra
A 50 gallon barrel plumb full of water springs a leak in the bottom and leaks at a constant rate of two gallons per minute. Write an equation that relates the amount of water left in the barrel, y in terms of how many minutes have passed since the leak began, x.
November 20, 2013

College Algebra
A company that bought a machine for $30,000 wants to depreciate its entire value equally over the next ten years. Write an equation that represents the machine's value, v, in terms of the number of years that have passed since the machines purchase, t.
November 20, 2013

College Algebra
Change the equation 5x+3y=60 to slope-intercept form.
November 20, 2013

College Algebra
Change the equation to slope-intercept form.
November 20, 2013

College Algebra
Mints cost 5 cents each and gumballs cost 3 cents each. Kathleen spent 60 cents buying x mints and y gumballs. Write an equation in stand form that represents all the different combinations of mints and gumballs that Kathleen might have purchased.
November 20, 2013

algebra
what is the cube root of -125x^6
November 10, 2013

world history
what did samuel kemper and the republican army accomplish?
November 1, 2013

Chem 1
Suppose 1.624g of salt FeSO4 is placed in a 250mL flask to which 50mL of water and 10 mL of 3M H2SO4 are added. How many mL of .1062 M KMnO4 solution are required to reach the endpoint?
October 21, 2013

Chem 1
What about the mL of water and H2SO4
October 21, 2013

Chem 1
Suppose 1.624g of salt FeSO4 is placed in a 250mL flask to which 50mL of water and 10 mL of 3M H2SO4 are added. How many mL of .1062 M KMnO4 solution are required to reach the endpoint?
October 21, 2013

Science
Oooh this helped me on mine.
October 8, 2013

Math
if kelly gave 1/3 of a pizza to holly and 1/5 to diana, how much did she have left?
September 30, 2013

math
write a numerical expression to represent the phrase Half a number increased by 34
September 19, 2013

math
a carload of fraternity brothers leave their house for a long weekend trip. three hours later a second carload of brothers leaves the same house and travels the same path. if the second care drives and average of 15 mph faster than the first, what is the average speed of eavh ...
September 9, 2013

math
jim has a box in the shape of a rectangular prism. The area of the base of the box is 48 square inches. The volume of the box is 144 cubic inches. Let h = the height of Jim's box. Write and solve an equation you can use to find the height of Jim's box.
August 29, 2013

algebra
A person invested 20,000$ in stocks and bonds. Her investment in bonds is 5,000$ more than half her investment in stocks. How much did she invest in stocks? how much did she invest in bonds?
August 29, 2013

Early childhood
Thank you!
August 25, 2013

English
What is the physical journey like in the novel "Murder on the Orient Express" and how does it add to the meaning?
August 23, 2013

trig
Find all solutions of the equation. Leave answers in trigonometric form. x^5-1024=0 I got 4(cos tehta + i sin tehta), tehta = 0, 2pi/5, 4pi/5, 6pi/5, 8pi/5 is this right
July 2, 2013

hazard bctcs
one aspect of the beauty of scenic landscape is its variability. The elevations (feet above sea level) of 12 randomly selected towns in the Finger Lakes Regions of Upstate New York are recorded here. 1117, 1360, 1009, 766, 1333, 1306, 577, 1144, 874, 658, 1306, 712. Find the ...
May 22, 2013

hazard bctcs
one aspect of the beauty of scenic landscape is its variability. The elevations (feet above sea level) of 12 randomly selected towns in the Finger Lakes Regions of Upstate New York are recorded here. 1117, 1360, 1009, 766, 1333, 1306, 577, 1144, 874, 658, 1306, 712. Find the ...
May 22, 2013

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