Monday

August 29, 2016
Total # Posts: 1,805

**Chemistry **

A student performing the water of hydration experiment can't seem to get his hydrate to constant weight. Several times he heats the compound, allows it to cool, and weighs it. But each time he does, he obtains a different mass. Can you suggest some possible causes for this...
*April 25, 2012*

**math**

the equation is Y=mx+b m=1,b=4 is it y=x+4
*April 25, 2012*

**math**

SO IS THE ANSWER B: -3; 4/3
*April 25, 2012*

**math**

what is the slope and y intercept of y=4/3x-3
*April 25, 2012*

**math**

what si the equation in slope-intercept form 5x-y=6
*April 24, 2012*

**Geometry**

10 units
*April 23, 2012*

**math **

what is the slope of (2,-1) and (3,2) is it -3
*April 23, 2012*

**math **

what is the slope of (3,-7) and (-1,-7) is it 4
*April 23, 2012*

**math **

what is the slope of (7,2) and (-1,3) is it -8
*April 23, 2012*

**Math**

By what factor should each edge of a cube be increased in order to increase its volume by a factor of 27? a.) 27 b.) 9 c.) 3 d.) 2
*April 23, 2012*

**Pre-Algebra**

what is the slope between the two points (3,-7) and (-1,-7) i dont know it
*April 23, 2012*

**math**

what is the slope between the two points (-4,6) and (-4,2)? is it 5
*April 23, 2012*

**math**

what is the slpe fo the two points (1,1) and (6,3)? is it -1/6
*April 23, 2012*

**Math**

I figured it out!! "x" equals 15! Thanks for your help!! I have more questions that i could use your help on!!
*April 23, 2012*

**Math**

How did you get the 75=5x?
*April 23, 2012*

**memorial**

Peter and Ashley each drew a triangle with an angle of 59 degrees. Under which condition would the triangles be similar?
*April 19, 2012*

**Chemistry**

Thank you so much!
*April 16, 2012*

**Chemistry**

What is the equationfor this?: Sulfur reacts with oxygen to produce sufur trioxide
*April 16, 2012*

**math**

so is it 75
*April 16, 2012*

**math**

hello
*April 16, 2012*

**math**

so its 0.12 right can you u just go thorough it with steps
*April 16, 2012*

**math**

is it 0.12 can u help me
*April 16, 2012*

**math**

last thing i promise ok the length of the wing of a model airplane is 3 in. if th escale of the model to the actual plane is 1in=25ft wha tis the length of the actual wing? is it 8.3 or 0.12
*April 16, 2012*

**math**

so the lenth of the object in a drawing is 6 inches right
*April 16, 2012*

**math**

and one more thing what is a proportion using the scale, 51ft, and the unknown legth of the drawing.
*April 16, 2012*

**math **

what is a scale? example please
*April 16, 2012*

**math**

so what points should i include in my explantion
*April 16, 2012*

**math**

you are making a scale drawing with a scale of 2 in =17ft. explain how you find the lenght of the drawing of an object that has an actual lenght of 51ft. what points should you include in your explanation?
*April 16, 2012*

**math**

how many feet are there in 4,000 miles?
*April 16, 2012*

**math**

so what points should you include in my explantation
*April 16, 2012*

**math**

you are making a scale drawing with a scale of 2in.=17ft. elplain how you find the length of the drawing of an object that has an actual lenght of 51ft
*April 16, 2012*

**math**

where did you get 5,280 from
*April 16, 2012*

**math**

the length of the Amazon River in South America is about 4,000 mi. How many feet is this?
*April 16, 2012*

**physics please help**

a 10.0-g marble rolls to the left with a velocity of magnitude 0.400 m.s^-1 on a smooth, level surface and makes a head-on collision with a larger 30.0-g marble rolling to right with a velocity of magnitude 0.100 m.s^-1. If the collision is perfectly elastic,find the velocity ...
*April 12, 2012*

**Pre-Algebra**

Suppose you consider a rectangular garden of 36 square meters with whole-number side lengths. What’s the dimension of design that has the least perimeter? What’s the dimension with the greatest perimeter?
*April 12, 2012*

**sCIENCE PLZZZZZZZZ HELP**

1. B 2. A 3. D 4. D
*April 11, 2012*

**College Physics **

A 40 kg child is standing on the edge of a merry-go-round in a playground. Before they were deemed too dangerous, these were quite common. They were just huge rotating platforms you could sit on while someone spun you around in uniform circular motion until you screamed in ...
*April 8, 2012*

**physics ( please help me)**

Ice hockey star Wayne gretzky is skatin at 13.0 m/s^1 towards a defender, who is in turn skating at 5.0 m/s^-1 toward gretzky.gretzky's weight is 756 N, that of the defender is 900 N. Immediately after the collision. gretzky is moving at 3.00 m/s^-1 in his original ...
*April 3, 2012*

**physics ( please help me)**

a railroad handcar is moving along striaght, fricionless tracks. In each of the following cases the car initially has a total mass (car and contents of magniude 4.00 m/s^1. Find the final velocity of the car in each of the three cases. A) a 40.0 kg mass is thown sideways out ...
*April 3, 2012*

**math**

He Burned His Lip In The Exhaust Pipe
*March 28, 2012*

**social studies**

how does the constitution compare with the articles of confederation? please help!!
*March 28, 2012*

**math**

the perimeter of a room is 45 yards and the area is 120 square yards. what would be the perimeter and the area of the room on a scale drawing with the scale of 3 feet to 1 yard?
*March 27, 2012*

**physics**

A 70-kg fisherman in a 138-kg boat throws a package of mass m = 15 kg horizontally toward the right with a speed of vi = 4.8 m/s as in the figure below. Neglecting water resistance, and assuming the boat is at rest before the package is thrown, find the velocity of the boat ...
*March 27, 2012*

**physics**

A 70-kg fisherman in a 138-kg boat throws a package of mass m = 15 kg horizontally toward the right with a speed of vi = 4.8 m/s as in the figure below. Neglecting water resistance, and assuming the boat is at rest before the package is thrown, find the velocity of the boat ...
*March 27, 2012*

**Pre-calculus**

how to graph f(x)={-0.5x+5 if x<1 {-0.5(x+5) if x¡Ý1 (the {'s are supposed to be one long one)
*March 27, 2012*

**Pre-calculus**

what is the domain of f[g(x)]? A.all the elements x in the domain of g for which g(x) is in the domain of f B.the range of x
*March 27, 2012*

**Pre-calculus**

how to graph f(x)={3x+2 if x<5 {-3x-2 if x¡Ý5 (the {'s are supposed to be one long one)
*March 27, 2012*

**Pre-calculus**

how do you graph f(x)={2x+5 if x<0 {5 if 0¡Üx¡Ü10 {2x-10 if x>10 (the {'s is supposed to be one long one)
*March 27, 2012*

**Chemistry**

how many phosphorus atoms are present in 25.0 g of P4O10 ?
*March 26, 2012*

**reading**

u r suposse 2 help me shame
*March 22, 2012*

**reading**

i did but it is so confusing can you please just help me
*March 22, 2012*

**reading**

in "the night the bed fell" how does the fact that all of the character were alseep when thurber's bed fell cause them to act especially starNGELY
*March 22, 2012*

**reading**

in "the night the bed fell" what is Brigg's crtchet, or peculiar idea
*March 22, 2012*

**math**

w _ = 6 5 What is the value of w?
*March 22, 2012*

**math**

Thanks ! couldnt wait though lol so I had my mom help me. :D
*March 22, 2012*

**math**

Jada's house is 8 blocks from school. How many blocks does she ride her bike TO AND FROM school in 5 days? Explain how you found your answer
*March 22, 2012*

**Math**

carpet at a British home supply store sells for 16 pounds(currency)per square meter.What is the price in dollars per square yard.
*March 21, 2012*

**math**

plz help students in a math class need an average of at least 90 points to earn an A. one student test scores are 88,91,and 85 what must be the strudent score on the nest test to earn an A? it is Inequalities
*March 20, 2012*

**math**

you want to spend at most $10 for a taxi ride. before you go ansywre the taxi driver sets the meter at the initial charge of $2 the meter then adds $1.25 for every mile driven. if you plan on $1 tip what is th efarthest you can go? it is Inequalities
*March 20, 2012*

**English**

for the story the street of the Canon.. -how does pepe gonzalez behave when he first arrives in the village the night of the party? -What might Gonzalez's actions suggest about the kind of person he is? -How does Gonzalez arrange to dance with Sarita? -when they began ...
*March 19, 2012*

**Chem Help PLEASE!**

nvm got it.
*March 14, 2012*

**Chem Help PLEASE!**

Asked earlier but got no reply :/ hopefully I get one now cause I'm really stuck and can't completely my assignment cause of one question.. How many grams of dry NH4Cl need to be added to 1.90 L of a 0.200 M solution of ammonia, NH3, to prepare a buffer solution that ...
*March 14, 2012*

**reading **

i dont know about this question what does the St. Crispians Day speech tell you about the character of Henry V can you please just help me
*March 13, 2012*

**reading**

can you please help me :)
*March 13, 2012*

**reading**

so is it that he wants the best for his army and that he thinks that they are the greatest can you please give me some of your answer
*March 13, 2012*

**reading**

last question i really dont understand this what does the St. Crispians day speech tell you about the character of Henry V Help me Please
*March 13, 2012*

**reading**

what reasons might Henry V have had for calling all the soliders, both noble and common, his brother in St. Crispian's day i think because they all worked together in the war. when they have worked and defeated the enemy together they are common, noble hard workers, and ...
*March 13, 2012*

**reading**

well i said that they are a good team ustoppable all fo them working as a team and they diserve the victory is it right or wrong you can add something
*March 13, 2012*

**reading**

hello ms sue describe the speaker's feeling about the calverymen. in the "the charge of the light brigade
*March 13, 2012*

**reading **

ok ms sue what is the spirit of the light brigade's calverymen as they mak their charge? i think at first some of them were questioning about the order like it was not going to work but, they couldnt turn back on their friends or commander in cheir. is that right
*March 13, 2012*

**Reading**

i think taht they lost the battle because when it said "while the horse and the hero fell", i knew tehy had lost the battle it that right
*March 13, 2012*

**Reading**

i think taht they will remember it because of the courageous people who fought on that day. the war they won was a honor and no one will forget that day. is that right
*March 13, 2012*

**reading**

that is what i thought thank you
*March 13, 2012*

**reading**

the soliders in "the charge of the light brigade" realize someone had blundered. Why do they still go into battle?
*March 13, 2012*

**Physical anthropology**

I think the answer is either d or b
*March 13, 2012*

**Physical anthropology**

Chinese premoderns retain certain H. erectus trails including- A. extreme post orbital construction and sagittal crests B. projecting canines and diastemata C. sagittal ridges and flattened nasal bones D. All of the above
*March 13, 2012*

**Physical Anthropology**

According to the multiregional evolution model- A. anatomically modern H. sapiens originated exclusively in Africa B. modern H. sapiens are a separate species from Neanderthals C. some local populations of archaic H. sapiens in Europe, Asia, and Africa contributed to the ...
*March 13, 2012*

**Pre-algebra**

what is 36>-9t and why please thank you
*March 12, 2012*

**Science (Chemistry)**

How many grams of dry NH4Cl need to be added to 1.90 L of a 0.200 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.99? Kb for ammonia is1.8*10^-5. Can anyone help me with this question? I have no idea how to solve it.
*March 12, 2012*

**voc 4**

The answer isnt most
*March 7, 2012*

**grammar**

What should i put? Five dollars (was,were)lying on the ground,so i turened them in at the office.
*March 6, 2012*

**physics**

The electric motor of a model train accelerates the train from rest to 0.680 m/s in 23.0 ms. The total mass of the train is 580 g. Find the average power delivered to the train during its acceleration.
*March 6, 2012*

**Health**

Maintaining a healthy diet can protect you from? A. Drug abuse B. Alcohol abuse C. Some cancers D. Sickle cell disease
*March 1, 2012*

**5 grade math**

The highest temperature on monday was 30 degrees. If the average high tempature for the week was 45 deggrees, what statement can you make for mondays tempature😕😧
*February 29, 2012*

**Math**

A farmer needs to enclose three sides of a pasture with a fence (the fourth side is a river). The farmer has 42 meters of fence and wants the pasture to have an area of 220 sq-meters. What should the dimensions of the pasture be? (For the purpose of this problem, the width ...
*February 29, 2012*

**Chem 1A**

Calculate the [OH ‾ ], [H+], and the pH of 0.16 M solutions of each of the following amines. (a) triethylamine [(C2H5)3N, Kb = 4.0 10-4] (b) hydroxylamine (HONH2, Kb = 1.1 10-8)
*February 28, 2012*

**Physics**

Two point charges, +Q and -Q of mass m, are placed on the ends of a massless rod of length L, which is fixed to a table by a pin through its center. If the apparatus is then subjected to a uniform electric field E parallel to the table and perpendicular to the rod, find the ...
*February 28, 2012*

**Physics**

Two point charges, +Q and -Q of mass m, are placed on the ends of a massless rod of length L, which is fixed to a table by a pin through its center. If the apparatus is then subjected to a uniform electric field E parallel to the table and perpendicular to the rod, find the ...
*February 28, 2012*

**physics**

a person is sled-riding down a hill that is 15.0 ft high. starting at the top with a speed of 10.0 ft/s, the sled reaches the bottom with a speed of 25.0 ft/s. (A) determine whether mechanical energy has been conserved. (B) why might mechanical energy not be conserved?
*February 28, 2012*

**statistics**

Science scores for HS seniors in the US are normally distributed with a mean of 77 and a standard deviation of 7. Students scoring in the top 4% are eligible for a special prize. What is the approximate cutoff score a student must get in order to recieve the prize?
*February 27, 2012*

**statistics**

Science scores for HS seniors in the US are normally distributed with a mean of 77 and a standard deviation of 7. Students scoring in the top 4% are eligible for a special prize. What is the approximate cutoff score a student must get in order to recieve the prize?
*February 27, 2012*

**Chemistry**

If acetic acid is the only acid that vinegar contains , calculate the concentration of acetic acid in the vinegar. if the pH of vinegar is 2.7
*February 26, 2012*

**Math**

Rebekah's recipe for 4 1/2 dozen cookies calls for 6 cups of sugar. How many cups of sugar are needed to make 8 dozen cookies? Is the correct answer 10 2/3 cups?
*February 25, 2012*

**math**

ive gotten 35 im no so sure can you help me
*February 24, 2012*

**math**

well ms sue i got 64 im not sure can you show me
*February 24, 2012*

**math**

what is 9+9d=8d-12
*February 24, 2012*

**physics please help**

the floors in a typical house are separated by a vertical distance of approximately 8.0 ft. a teenager (1.0x 10^2 lb) climbs the stairs between floors at a steady speed. find the power necessary to accomplish this if the stairs are climbed in (a) 10.0 s and (b) 2.0 s. express ...
*February 24, 2012*

**physics please help**

one kilwatt/hour (kWh) is the amount of work or energy generated when one kilowatt of power is supplied fr a time of one hour. a kilowatt/hour is the unit of energy used by power companies when figuring your electric bill. determine the number of joules of energy in one ...
*February 24, 2012*

**math**

write a problem you could represent with 3n-7=14.
*February 23, 2012*

**math**

the problem's numbers used $10,$2, $36
*February 23, 2012*