Tuesday

February 28, 2017
Total # Posts: 1,992

**trig**

write sin4xcos2 as the sum or difference of two functions. answers: 1/2(cos6x+cos2x), 1/2(cos2x-cos6x), 1/2(sin6x+sin2x), sin6x-sin2x

*May 17, 2012*

**math**

Miss C gives a test to the 10 students in her first-period algebra class. The grades are 93,82,95,86,90,84,89,79,87,93 A. Find the mean and Standard Deviation of the 10 scores. B. List all the reasons for why the late class could have a different mean or standard deviation

*May 17, 2012*

**egypt**

how did the egyptians explain the unknown?????????

*May 16, 2012*

**Math**

Diana practices the piano 45 minutes each day o Sunday, Tuesday, Thursday, and Saturday. How many minutes does she practice the piano each week?

*May 15, 2012*

**history**

also what belief and value did jesus teach

*May 14, 2012*

**history**

how big was the city of rome?

*May 14, 2012*

**language arts**

Thank you Ms.Sue

*May 6, 2012*

**language arts**

How should I fix it?

*May 6, 2012*

**language arts**

Is this sentence a run on? An important decision made by Parvana was when Parvana agreed to go outside to buy food while she was dressed as a boy.

*May 6, 2012*

**math**

For the sequence 0,3,8,15,24,35.... find a formula for tsubn in terms of n.

*May 2, 2012*

**SOCIAL STUDIES PLZZ HELP**

Brasilia and the indengionus way of life

*April 30, 2012*

**physics**

A uranium nucleus 238U may stay in one piece for billions of years, but sooner or later it de- cays into an particle of mass 6.64×10−27 kg and 234Th nucleus of mass 3.88 × 10−25 kg, and the decay process itself is extremely fast (it takes about 10...

*April 29, 2012*

**math**

A geometric series has first term 8 and third term 20 what does the fifth term equal? What does the third partial sum equal?

*April 27, 2012*

**maths**

(a) A random survey of 100 mobile telephone customers indicated that 96 of them had not experienced any difficulties in making mobile calls in the previous 3 months. (i) Derive a point estimate for customer satisfaction levels with the service (ii) Construct a 95% Confidence ...

*April 26, 2012*

**Accounting**

Questions 1. What is the issuing price for bonds A and B respectively? Show your calculations. 2. For bond A, provide the journal entries for • the issuance of bond, and • the first three interest payments. Please write down the date for each journal entry. Show your...

*April 23, 2012*

**intermediate algebra**

I don't know what the AC method is but I would do the following: 2x(3x^2-2x-5) 2x(3x-5)(x+1)

*April 22, 2012*

**Chemistry help!!**

So I got 38.13 mL .. Thank you so much now that I see how to do it, it makes much more sense to me.

*April 22, 2012*

**Chemistry help!!**

A chemist wants to be a supercook and wants to create 8%(m/v) acetic acud solution to be "extra strength" vinegar. if pure acetic acid Is a liquid density of 1.049 g/ml. how many ml of acetic acid should be dissolved to male 500 ml of 8% acetic acid? It says to first...

*April 22, 2012*

**Algebra**

Not sure if this is correct but i 57*x+13*x-5=5 just a guess not sure if this is correct.

*April 22, 2012*

**Chemistry**

A chemist wants to be a supercook and wants to create 8%(m/v) acetic acud solution to be "extra strength" vinegar. if pure acetic acid Is a liquid density of 1.049 g/ml. how many ml of acetic acid should be dissolved to male 500 ml of 8% acetic acid? Calculate grams ...

*April 22, 2012*

**english**

Be sure to develop your speech in the way the audience who you will be talking to will understand, and be sure to make a speech that will catch everyone's attention! Best of luck! :)

*April 22, 2012*

**Government**

Does the U.S. have a responsibility to become involved in Syria or any other country where civilians are being killed by their leaders?

*April 20, 2012*

**Math**

At a track meet, competitors could win gold, silver or bronze medals. Kennedy High Schools track team won a total of 18 medals. Three of the medals were gold. There were twice as many bronze medals as silver medals. How many bronze medals did the track team win?

*April 17, 2012*

**Social Civics**

and thank you for your help!

*April 16, 2012*

**Social Civics**

Yeah I know...civics isnt my cup of tea.

*April 16, 2012*

**Social Civics**

I have heard that they have a 100 word essay. What would it be on?

*April 16, 2012*

**Social Civics**

Does anyone know how to prepare for the final exam for Social Civics for American Schools?

*April 16, 2012*

**english**

The second line is Italic

*April 5, 2012*

**calculus**

Let f(x) = (x − 3)−2. Find all values of c in (2, 5) such that f(5) − f(2) = f'(c)(5 − 2). (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) C=?

*April 1, 2012*

**chemistry**

So what is the answer

*March 30, 2012*

**chemistry**

How many grams of solute are present in 785 mL of 0.480 M KBr?

*March 29, 2012*

**Chemistry**

Predict the color change when an aqueous solution containing Ag+ ion is added to a green solution of the copper (II) ion. It is green because HCL has been added. Thanks.

*March 28, 2012*

**Chem**

How many mL of .150 M sodium hydroxide is required to neutralize 25 mL of .125 M of phosphoric acid?

*March 26, 2012*

**Chemistry**

What mass of solid calcium hydroxide is required to neutralize .100 L of .500 < sulfuric acid?

*March 26, 2012*

**Chemistry**

How many mL of .150 M sodium hydroxide is required to neutralize 25 mL of .125 M of phosphoric acid?

*March 26, 2012*

**math**

Bob finds that the cost of driving his truck is 92 cents per mile. Give a symbolic and graphical representation for a function f(x) that computes the cost in dollars of driving x miles. Assume 0<x<60

*March 25, 2012*

**CHEM, please help!**

What pH buffer solution is needed to give a Ni2+ concentration of 2.5 x 10-3M in equilibrium with solid nickel hydroxide Ni(OH)2? Ksp = 6.0 x 10-16.

*March 18, 2012*

**math**

I had a total of 129 marbles in 3 boxes at first. Then i away 2/3 of the marbles from box1, added 15 marbles to box 2 and added somes to box 3 until the number of marbles in box 3 tripled. As a result, the ratio of the number of marbles in box 1 to the number of marbles in box...

*March 13, 2012*

**Math**

100Ã—431Ã·8576-234+65454Ã—443321167899= [this might be hard]

*February 29, 2012*

**Science**

A student observed two different types of cells under a microscope. She noticed that one cell had many more mitochondria than the other. What can the student predict about the cell with more mitochondria? A. The cell produces more waste. B. The cell makes more proteins. C. The...

*February 27, 2012*

**Chemistry**

FIRST U should find whether there is reaction when they are mixed,and then what is the concentration of the mixture.next,find the concentration of H+ ion,finally,use this formular to solve your problem pH =-log[concentration of H+ ]

*February 26, 2012*

**Art**

These are all of the answers!! Gosh how hard could this possibly be. 1. Alexander Calder invented this type of art. (0 pts) fiber art (1 pt) mobiles (0 pts) stabiles (0 pts) public art 2. Today, decisions in planning, selecting, and/or creating an artwork for public display ...

*February 20, 2012*

**CHEM, please help!**

A 11 mL sample of a solution of AlBr3 was diluted with water to 23 mL. A 15 mL sample of the dilute solution was found to contain 0.045 moles of Br-. What was the concentration of AlBr3 in the original undiluted solution? answer is 2.09 but i cant get it.

*February 16, 2012*

**chemistry**

. A 13 mL sample of a solution of AlBr3 was diluted with water to 56 mL. A 25 mL sample of the dilute solution was found to contain 2.21 M Br-. What was the concentration of AlBr3 in the original undiluted solution?

*February 16, 2012*

**chemistry**

How many milliliters of a 155 mL solution of 1.7 M AlCl3 must be used to make 70 mL of a solution that has a concentration of 0.21 M Cl-?

*February 16, 2012*

**SCIENCE**

no idea

*February 16, 2012*

**6th grade science**

oh that's ok then.thank you for trying though!!!I already really appreciate that!!!so still,thank you. :)

*February 16, 2012*

**6th grade science**

please!!!Mrs.sue????can you please help me!!!!

*February 16, 2012*

**6th grade science**

can someone please help me with this question because i have no clue what the answer is so can someone please help me with this question???

*February 16, 2012*

**6th grade science**

what would happen if cytokinesis occurred without mitosis???

*February 16, 2012*

**chemistry**

describe how to prepare a .50 m solution of lead nitrate using only 100.00 mls of water. aslo discribe how to prepare a .50m sloution of sodium iodide using only 100.00 mls of water. explain the differences that exist between these two solutions. OK i have answers for both 1....

*February 15, 2012*

**6th grade math**

A stray dog ate 12 of your muffins.That was 3/10 of all of them! with how many did you start???

*February 13, 2012*

**6th grade math**

can someone please explain to me what the Answer is and also can someone please explain to me how to slove this question step by step??? Please??!!

*February 13, 2012*

**6th grade math**

If the weight of a package is multiplied by 5/7 the result is 40.5 pounds.Find the weight of the package.

*February 13, 2012*

**6th grade math**

thank you

*February 13, 2012*

**6th grade math**

can someone please help me with this question?And can someone also teach me step by step how to solve this question???Please???

*February 13, 2012*

**6th grade math**

your mother gave you $13.32 with which to buy a present.This covered 3/5 of the cost.how much did the present cost? can someone please help me and also show me how to solve this?

*February 13, 2012*

**6th grade science**

thank you soooo much!!!!:)

*February 12, 2012*

**6th grade science**

please???I am in a big time rush!!! please!!!

*February 12, 2012*

**6th grade science**

can someone please help me with this!!! please...

*February 12, 2012*

**6th grade science**

why would a shredded carrot turn the softest when it is sitting on top of a table out in the open air compared to the carrot in water and the carrot in salty water?

*February 12, 2012*

**Calculus (Antiderivatives)**

ok im sorry :(

*February 11, 2012*

**Calculus (Antiderivatives)**

no idea

*February 11, 2012*

**cells**

please????

*February 11, 2012*

**cells**

can someone please help me??? I really have no idea what the answer is!!!

*February 11, 2012*

**cells**

suppose a cell is placed in a large container of water with a very low solute concentration.what do you think will happen?

*February 11, 2012*

**Chemistry**

IS this right?

*February 9, 2012*

**6th grade science**

please!!!

*February 9, 2012*

**6th grade science**

can someone please help me with this!!!

*February 9, 2012*

**6th grade science**

which particles cannot pass through the cell membrane?

*February 9, 2012*

**Math**

In a playground, there is a model of the old school building that is 6.6 feet long, 3.3 feet wide, and 4.6 feet high. If the real building was 80 feet long and 40 feet wide, how high was it?

*February 8, 2012*

**chemistry**

1.5x10^7 molecules of hydrogen sulfate. find the number of grams for the molecules listed

*February 8, 2012*

**6th grade science**

PLEASE!!!

*February 6, 2012*

**6th grade science**

can someone please help me!!!

*February 6, 2012*

**6th grade science**

at the end of cytokinesis, how many chromatids will be found in each daughter cell? explain.

*February 6, 2012*

**6th grade science**

is it the "S" phase???

*February 5, 2012*

**6th grade science**

during which phase is DNA duplicated?

*February 5, 2012*

**6th grade science**

thanks

*February 5, 2012*

**6th grade science**

can someone please help me!

*February 5, 2012*

**6th grade science**

what are the four phases of mitosis??? -------,-------,-------,-------

*February 5, 2012*

**6th grade math**

oh....I see,thanks!!!:)

*February 5, 2012*

**6th grade math**

HELP!!!!!

*February 5, 2012*

**6th grade math**

the expression 4 - p is equivalent to "four minus a number", but not to "a number minus four".explain why.

*February 5, 2012*

**Pre-Algebra**

Please let me know if I figured these out correctly. Directions: For the line with the given equation, find the slope of a parallel line and the slope of a perpendicular line. 1)y=6/5x + 144 slope of parallel: 6/5 slope of perpendicular: -5/6 2)4y-4x=16 slope of parallel: 1 ...

*January 30, 2012*

**Math**

Thank you!

*January 29, 2012*

**Math**

Please let me know if I figured this out correctly. Directions:Write an equation for the line that is perpendicular to the given line and that passes through the given point. 1) y=x-3; (4,6) Answer: y=-x-10 Thank you!

*January 29, 2012*

**Math**

Thank you!!!

*January 29, 2012*

**Math**

Please let me know if I figured this out correctly. Directions: Find the slope of a line perpendicular to the graph of each equation. 1) y= -x/5 - 7 Answer: Slope = 5 2) 2x + 3y=5 Answer: Slope = 3/2 Thank you!

*January 29, 2012*

**physics**

12120

*January 28, 2012*

**math**

Calculate the average rate of change over the given interval of the given function. f (x) = x3, from x = 8 to x = 9

*January 27, 2012*

**Right Triangle Trigometery**

If = 38° and z = 68 cm, what is the value of x to the nearest tenth of a centimeter?

*January 26, 2012*

**trig**

This is not trig. Anyway, C=2(pi)r. If the circumference is 12.31, then the radius is 12.31/[(pi)r] = 1.96. If the central angle is 1/4 of a revolution, then the central angle measure is 90 degrees. The area of a sector is a piece of the area of the entire circle: A=(pi)r^2 * ...

*January 25, 2012*

**Calculus**

Over what open interval does the formula F(x)= int from 0 to x of dt/t represent an anti derivative of f(x) =1/x? Find a point where the graph of F crosses the x axis.

*January 25, 2012*

**Calculus**

Let F(x)=int from 0 to x of (t-3)/(t^2+7) dt for -infinity <x< infinity. a. Find the value of x where F attains its minimum value. b. find the intervals over which F is only increasing or only decreasing. c. Find open intervals over which F is only concave up or only ...

*January 25, 2012*

**Calculus**

True or false: If f(x) is continuous on the interval [a,b] & if the definite integral of f(x) over this interval has value zero, then the equation f(x)=0 has at least one solution in the interval [a,b]. True or false: If f(x) is continuous everywhere and F(x)= int from 0 to x ...

*January 25, 2012*

**Calculus**

First, divide each term in the numerator by the denominator. x/x + sin(x)/x (x/x=1) 1+sin(x)/x The Sandwich (or Squeeze theorem) states that the limit as x->0 of sin(x)/x is 1. 1+1=2 You can ask me more questions on Facebook:Kate Calendrillo, Math Tutor.

*January 25, 2012*

**geometry**

If line segment A is parallel to line segment B and m<4=83, then m<2=?

*January 23, 2012*

**advanced math**

Can you please tell me if 14=-(p-8) is 6= -p .....

*January 23, 2012*

**sociology**

What are some changes that are occuring in families. Are these changes for the good or bad?

*January 20, 2012*

**chemistry(balance equation)**

How to balance HNO3 +Cu ------->Cu(NO3)2+NO+H2O ? please show me steps

*January 19, 2012*