Monday

January 23, 2017
Total # Posts: 3,492

**Math**

the area of a rectangle is given by the expression (x^3+7x^2+11x+2) in^2. The length of the rectangle is given by the expression (x+2) in. What is an expression for the width of the rectangle?

*January 22, 2017*

**Chemistry (HELP AGAIN)**

You were finding (g) but the question is asking to CALCULATE THE MOLES OF HYDROGEN GAS PRODUCED which I'm really confused about because I don't know how to go about this question now knowing the chemical reaction that occured. I'm sorry but can you find the Moles. ...

*December 18, 2016*

**Chemistry(HELP) MathMate**

Thank you. Is there any chance that you could write it mathematically from your explanations. I have a hard time trying to decipher the work from standard form to numbers. I really appreciate the explanation though!

*December 18, 2016*

**Chemistry**

Also, In this experiment hydrogen gas is collected over water and can be referred to as a "wet" gas. Why is "wet" gas as an appropriate term for this? Is it because hydrogen gas is collected over water, which is wet?

*December 18, 2016*

**Chemistry! Help**

I don't understand how you would calculate the moles with a chemical equation given the 7.00 g of Magnesium.

*December 18, 2016*

**Chemistry**

A.) Write a balanced chemical Eq'n for a reaction between MAGNESIUM & HYDROCHLORIC ACID. Answer: Magnesium + Hydrochloric Acid Mg (s) + 2 HCL (ag) ---- MgCl2 (aq) H2(g) B.) Assuming 7.00 g of Magnesium completely react according to the above Eq'N, calculate the MOLES ...

*December 18, 2016*

**algebra**

Elimination method or substitution method. 1. 3/5x = 1/2y + 11 2. 3x + 8y + 13

*December 14, 2016*

**Science**

Each heating element has a resistance of 5 ?. The current passing through each element is 0.4. Calculate the total resistance of the six heating elements.

*December 14, 2016*

**math**

A restaurant offers seven different main courses,,eight types of drinks and four kind of desserts. How many different meal consisting of main course,a drink and a dessert does the restaurant offer?

*December 12, 2016*

**Math**

When calculating area, you always multiply. Area= Length X Width.

*December 3, 2016*

**Math**

Many times, the author of an assignment will include common mistakes as answer choices. You then need to check your answer by making sure it makes sense. If she buys more than twice as much as she did the first time, will the answer be greater than or less than the amount she ...

*December 3, 2016*

**Math**

Since the problem says "2 1/2 times" you are going to multiply. If you are getting the same answer dividing, you are dividing incorrectly. My guess is that you are not flipping the second fraction before multiplying when you are dividing (to divide fractions, you ...

*December 3, 2016*

**Math**

If your teacher wants to keep it in fractions... Convert 21 7/8 into an improper faction of 175/8 and 2 1/2 into 5/2. Multiply together and reduce/ convert to mixed fraction of 54 11/16.

*December 3, 2016*

**8th Grade Journalism**

1. Suggest- The principal received the exam results and announced over half of the students who took the exam failed the exam. 2. The administration recently conducted talks to determine... 3. A faulty ladder killed a construction worker last week... Basically- try to make the...

*December 3, 2016*

**chemistry**

The actual question is: A sample is analyzed to determine its iron content (as Fe2+0 via a redox titration with potassium chromate as the titrant. In the titration Fe2+ is oxidized to Fe3+ and CrO4(2-) is reduced to Cr3+. What is the percent by mass of iron in the sample if 0....

*December 3, 2016*

**chemistry**

Fe2+ is oxidized to Fe3+ and CrO4is reduced to Cr3+ using an unknown sample containing Fe2+ and 0.04322M K2CrO4 solution in a redox titration. I first need to balance the formula, but I don't know what to do with the potassium.

*December 3, 2016*

**Math**

I got 6 when solving for M but i dont know how to explain

*November 21, 2016*

**Math**

Im sorry Im new to this how do I solve for M 30+25M = 300-20M

*November 21, 2016*

**Math**

Two hot air balloons are in flight above a field. The first Balloon is 30 meters above the ground rising 25 meters per minute. The Second Balloon is 300 meters above the ground descending 20 meters per minute. When will the 2 balloons be at the same altitude? What would be the...

*November 21, 2016*

**anatomy**

True

*November 20, 2016*

**math 9**

Given Parallelogram ABCD with AB=(3x-5)cm, BC=(2y-7)cm, Cd=(x+7)cm, AD=(y+3)cm

*November 13, 2016*

**Chemistry**

How many electrons in an atom could have these sets of quantum numbers? n=2 n=5, l=3 n=6, l=1, ml=-1

*November 13, 2016*

**chemistry**

the word "proof" on alcoholic beverages is defined as twice the percentage by volume. How many ml of alcohol are in a one-liter bottle of 80-proof gin?

*November 12, 2016*

**chemistry**

how much solute are present in a solution that contains 100.0g of water, and is 9.0% by weight sodium bicarbonate?

*November 12, 2016*

**chemistry**

how many grams of potassium nitrate are needed to prepare 250.0ml of a 0.03M potassium nitrate solution?

*November 12, 2016*

**chemistry**

calculate what volume of sulfuric acid solution(specific gravity=1.07;and containing 10%sulfuric acid by mass)contains 18.50g of pure sulfuric acid at a temperature of 25 Celsius.

*November 12, 2016*

**chemistry**

what volume of a 0.20M potassium sulfate solution contains 57g potassium sulfate?

*November 12, 2016*

**chem 15**

The hardness of water (hardness count) is usually expressed as parts per million (by mass) of calcium carbonate. What is the molar concentration of calcium ions in a water sample with a hardness count of 175ppm?

*November 8, 2016*

**chem 15**

A bottle of a certain ceramic tile cleanser, which is essentially a solution of hydrogen chloride, contains 130 g of HCl and 750 g of water. What is the percent by mass of HCl in this cleanser?

*November 8, 2016*

**Statistics**

The Citiburg Parks Department has just installed 1100 new lightbulbs with an expected mean lifespan of 64 months and a lifespan standard deviation of 8 months. Assuming normally distributed bulb failure, how many bulbs will need to be replaced after 49 months? Round your ...

*October 29, 2016*

**Statistics**

The Townville Parks Department has just installed 1900 new lightbulbs with an expected mean lifespan of 75 months and a lifespan standard deviation of 12 months. Assuming normally distributed bulb failure, how many bulbs will need to be replaced after 53 months? Round your ...

*October 29, 2016*

**algebra**

find the x-intercepts, f(x)=-9x^2-48x-64

*October 24, 2016*

**Math**

How many 10-inch pieces can be cut from a 6-foot piece of shelving?

*October 13, 2016*

**math**

amara rode her bicycle 8 miles in 0.5 hours.what was the average rate that she rode her bicycle in miles per hour?

*September 29, 2016*

**Geometry**

A map has the scale 2.5 inches:.75 miles. The distance from east to west is 6 inches what is the distance in miles

*September 29, 2016*

**Calculus**

1. Use a graph to estimate the limit. Use radians unless degrees are indicated by θ°. (Round your answer to four decimal places.) lim θ → 0 θ/tan(7θ) 2. Assuming that limits as x → ∞ have the properties for limits as x → c, use ...

*September 28, 2016*

**Chemistry**

Write the net ionic equation for the equilibrium that is established when ammonium nitrate is dissolved in water. (Use H3O+ instead of H+)

*September 27, 2016*

**Physics**

A: 4.16 N B: 4.16/588

*September 27, 2016*

**Social Studies**

What were some of the advantages the continental army had over the British? Select all that apply. Fighting on familiar territory*** A large navy More troops*** Better supplies

*September 23, 2016*

**Science**

A family is planning to build a raised planting area using a blend of peat moss, mulch, and a rich organic soil in which to grow the plants. they have been told first to place on the ground a layer of material that will allow for a proper drainage each time the plants are ...

*September 20, 2016*

**algebra**

90 students from three different classes, A, B, and C are going on a field trip. Class A has 32 students and Class B has 28 students. Write an equation to describe the situation.

*September 5, 2016*

**Chemistry**

The homework question said "which 2nd row element has 6 valence electrons and a valence of 2?" I don't really understand the question, because oxygen would be the element with the 6 valence electrons, but wouldn't that mean that it has a valence of 6? Does ...

*September 2, 2016*

**math**

Sam is one-third as old as his brother. In six years Sam will be one-half as old. How old is Sam now?

*August 11, 2016*

**Maths**

How would you solve the equation: 15 = 2x + y

*July 23, 2016*

**Math - Transformations**

State the transformation for g(x) = -2 (2x - 4)³ - 1 Would it be a vertical stretch by a factor of 2 a reflection in the x-axis a horizontal stretch by a factor of 1/2 a translation 4 units right and 1 unit down Am i right?

*July 11, 2016*

**Math**

The function −2𝑓(2𝑥 + 4) − 1 has been transformed from the graph of 𝒇(𝒙) = 𝒙^𝟑 Write the equation for the transformed function.

*July 11, 2016*

**Even or Odd Funciton**

is f(x) = 1/(x^3 - 5x) even, odd or neither? i am thinking neither but im not too sure. cz when i sub in (-x) i get 1/((-x)^3-5(-x)) then i don't really know what this means.

*July 11, 2016*

**Math Please Help**

Simon travels north and south from Main Station. The distance, in km, of the train from Main Station is modeled by the function d(t)=t^3-9t^2+6t, where North is positive and South is negative. Time elapsed after the start of a shift, in hours, is represented by t, where &#...

*July 7, 2016*

**Math Please Help**

Sorry the Equation is d(t)=t^3-9t^2+6t

*July 7, 2016*

**Math Please Help**

Simon travels north and south from Main Station. The distance, in km, of the train from Main Station is modeled by the function 𝑑(𝑡) = 𝑡 3 − 9𝑡 2 + 6𝑡, where North is positive and South is negative. Time elapsed after the start of ...

*July 7, 2016*

**Math**

Can a polynomial function of an even degree be an even function? is this true all the time? Thank You!

*July 6, 2016*

**Math**

so if i found that the roots are -3 and 4 how would i write that? -3(order 2), 4 because at -3 the function acts like a quadratic but at 4 it acts linear.

*July 6, 2016*

**Math**

What does it mean when it says Roots (order) for a function eg. -x^3-2x^2+15x+36 What i mean is how do you the answer.

*July 6, 2016*

**math**

Ashley bought a circular rug for her room. the rug has a diameter of 9 feet. Her room is rectangular-shaped and measures 12 feet by 18 feet. about how much of Ashley's room will not be covered by the circular rug?

*May 18, 2016*

**Math**

I want to make quilt with an area of 42 sq.feet. what are its possible dimensions if they must be whole numbers? Please show his you got your answer

*May 17, 2016*

**BIO PLEASE HELP!**

Identify the Protist and explain why you think it is what you said. We took dead leaves from outside, put them in boiling water then looked at them a week later. Link to image below! LINK: postimg. org/image/gu1201se9/ Ive attempted to look everywhere but i can't find a ...

*May 13, 2016*

**Math**

16/x

*May 13, 2016*

**Biology**

Identify the Protist and explain why you think it is what you said. We took dead leaves from outside, put them in boiling water then looked at them a week later. Link to image below! LINK: postimg. org/image/gu1201se9

*May 13, 2016*

**Biology**

Identify the Protist and explain why you think it is what you said. We took dead leaves from outside, put them in boiling water then looked at them a week later. Link to image below! LINK: postimg. org/image/gu1201se9/

*May 13, 2016*

**STATS**

What is the probability that the average salary of a sample of 49 part time bank teller will be less than $22,600?

*May 12, 2016*

**Math**

There are six true-false questions on a quiz. Not knowing any of the answers, a student guesses randomly. Find the probability of each event. Exactly two answers are correct. Exactly six answers are correct. At least five are correct. At least three answers are correct.

*May 10, 2016*

**Math -Trig**

Determine the exact value if cot(3pi/4) using special triangles. I don't understand how it could be 1/tan3pi/4 in a triangle....

*May 3, 2016*

**Math - Trig**

if the diameter of a tire is 3.5 m and makes one rotation every 5 seconds, how far does the tire rotates in one minute?

*May 3, 2016*

**Physics**

An 11.98-gram sample of zinc metal is placed in a hot water bath and warmed to 78.4°C. It is then removed and placed into a Styrofoam cup containing 50.0 mL of room temperature water (T=27.0°C; density = 1.00 g/mL). The water warms to a temperature of 28.1°C. ...

*April 28, 2016*

**Algebra**

Divide. (X^2+6x+9/x-1)/(x^2-9/x^2-2x+1) A. (X+3)(x-1)/(x-3) B. (X-3)(x+1)/(x+3) C. (X+3)(x+1)/(x-3)** D. (X-3)(x-1)/(x+3) Divide. (X^2-4/x-8)/x-2 A.(x-2)(x+2)/x-8 B. X-8/x+2** C. X-2/x-8 D. x+2/x-8

*April 28, 2016*

**Stat**

Does anyone know how to solve for this Suppose that a principal of a local high school tracks the number of minutes his students spend texting on a given school day. He finds that the distribution of minutes spent texting is roughly normal with a mean of 60 and a standard ...

*April 22, 2016*

**Math**

When measuring the volume of a tennis ball, your water level rose from 50ml to 68ml. What is the volume of the ball? I don't know if I divide or add to solve. Here is the choices. 118,108,18,8.

*April 21, 2016*

**Math**

Given that x=log3^5 and y=log3^2, rewrite log3^60 in terms of x and y.

*April 20, 2016*

**Sociology**

I mixed my question up. I need help finding similarities between the two, not differences.

*April 10, 2016*

**Sociology**

Im writing a paper on the similarities and differences of race and ethnicity. I have no problem finding similarities on the two, but finding differences are challenging. The only difference I know of is that they are both socially constructed. Can someoneone give me a few more...

*April 10, 2016*

**BASIC BIO ISH QUESTION**

which animal eats Southern tamandua? And if possible be specific to Venezuela animals THANKS when i tried looking i couldn't really find anything...

*April 9, 2016*

**Sociology**

Any help with this question would be great, even if its just a link(s) of where I could find information. Directly compare and differentiate race and sex and then ethnicity and gender?

*April 9, 2016*

**Neutons Thrid law**

Thank you that makes a lot of sense!

*April 8, 2016*

**Neutons Thrid law**

3. A force of 36 N gives a mass m1 an acceleration of 4.0 m/s2. The same force gives a mass m2 an acceleration of 12 m/s2. What acceleration will this force give to m1 and m2 if the two masses are fastened together? {3.0 m/s2}

*April 8, 2016*

**Neutons Second Law**

A 1200 kg car travelling at 50 km/h experiences an air resistance of 5000 N and road friction of 2200 N. If the wheels push with a force of 7500 N, what is the car's acceleration?

*April 7, 2016*

**Acid Base Chem**

During the course of an experiment with hydorgen phsophate (HPO42-) you find that it is functioning as a base. When you search for the Kb value of it you only find pKa1= 2.15, pKa2= 7.20, and pKa3= 12.35 of phosphoric acid (H3PO4). What is the Kb value??

*April 5, 2016*

**Physics/Cars**

Thank You!

*March 31, 2016*

**Physics/Cars**

Does the mass of the car matter when driving on the road? When skidding?

*March 31, 2016*

**chemistry**

30.2 g/mL

*March 21, 2016*

**Physics**

a bird is flying through the air with an air speed 12.6m/s heading 27.7 west of north. it is a windy day with wind velocity blowing at 8.95m/s heading 12.5 south of west. what is the velocity of the bird as seen by a person on the ground

*March 20, 2016*

**Physics**

your car has stalled and has come to rest on a level section of a busy street. you and a passenger decide to push the car to the side of the road so it will not interfere with the trafic. together you excert a combine horizontal force of 1320N. the coefficent of static ...

*March 20, 2016*

**Calculus**

Q: Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 6 ft high? (Round your...

*March 19, 2016*

**Math/Precal**

How do i give the exact value for: (sin pi/8)(cos pi/24) + (cos pi/8)(sin pi/24)

*March 15, 2016*

**PHYSICS**

Object A experiences a gravitational force due to object B. How would that force change if the separation distance is halved, mA triples, and mB is reduced to one quarter of its original value?

*March 15, 2016*

**math**

A floor refinishing company charges $1.91 per square foot to strip and refinish a tile floor for up to 1000 square feet. There is an additional charge of $250 for toxic waste disposal for any job which includes more than 150 square feet of tile. (a) Find an equation for the ...

*March 13, 2016*

**Biology - Evolution**

THANK YOU!! :)

*March 7, 2016*

**Biology - Evolution**

Suppose you grabbed ten seeds from the large number of seeds that were present and planted them in a garden. During the summer you harvest 100 bean seeds from these 10 groups of plants? Would you wee the same distribution of seed size as when you first planted the seeds? ...

*March 7, 2016*

**Maths**

y = 3cos(3x)cos(10x) This function represents the displacement-time of a guitar string as it vibrates, the period of it is the beat frequency. What are the strengths and limitations of this model?

*March 7, 2016*

**Chemistry**

Would glass, plastic or cardboard be best to store milk so the lactic acid doesn't increase?

*March 6, 2016*

**Literary Devices - English**

What type of literary device is "dead in the eye"

*March 4, 2016*

**accounting**

6.70

*February 27, 2016*

**math**

: Use the formula from Part I to find the midpoint of the segment with endpoints at (-2, -1) and (0, 9). Show your work.

*February 24, 2016*

**Chemistry**

the longest wavelength of light that will cause an electron to be emitted from a metal is 520nm. what is the work function for this metal? (note: the work function is given as kJ/mole of electrons released)

*February 22, 2016*

**Math**

3/8 x 11/15 in its simplest form

*February 22, 2016*

**French**

oh sorry. lol. I thought the responses weren't showing so I kept typing it.

*February 15, 2016*

**French**

Also, is this correct Great job to the entire cast of Le Petit Nicolas! Excellent travail pour l'ensemble du casting de Le Petit Nicolas !

*February 15, 2016*

**French**

Also is this correct: Great job to the entire case of Le-petit Nicolas! Excellent travail pour l'ensemble du cas de Le-petit Nicolas !

*February 15, 2016*

**French!!!!**

So #1 is "Je la"? and also #4 , I didn't write "a retarder" .. What exactly are you referring to?

*February 15, 2016*

**French**

_________________________________ Also is this correct? 1.) I like comedy and this film has a lot of comedy -Je tiens comédie et ce film a beaucoup de comédie 2.) Overall the movie is successful in terms of comedy and entertainment. -Globalement, le film est un ...

*February 15, 2016*

**French**

Is this right? I personally think the movie is enjoyable and entertaining because the environment in which the film occured is bright Personnellement, je pense que le film est agréable et divertissant parce que l'environnement dans lequel le film est produit est ...

*February 15, 2016*