Saturday

March 28, 2015

March 28, 2015

Total # Posts: 470

**Trigonometry**

Solve: 2 cos[x-ð/8]-sqrt2=0
*May 30, 2011*

**Trigonometry**

If tan theta= 3 and ð<theta< 3ð/2, find cos theta.
*May 30, 2011*

**Math (pre-algerbra)**

I've tried this sooo many times I have huge marks on my paper and I just can't figure it out: 3a/8-a/12+7/2=7
*May 9, 2011*

**math**

47 divide by 6
*May 4, 2011*

**speech**

why is australia a luck contry
*May 3, 2011*

**5 grade math**

$3,000,000,000,000,000 how much is this in words?
*May 2, 2011*

**math**

which of the numbers are integers? 11/3,9.7,-163,-3/8,1
*April 26, 2011*

**math**

The following scores were recorded on a 100-point examination: 95, 75, 76, 86, 96, 71, 68, 81, 95, 76, 69, 82, 93, 88, 94 Find the mean and median final examination scores.
*April 25, 2011*

**math**

1.)Name the property that is illustrated. a) 7 „e 6 ƒ 6 „e 7 b) 7 ƒy (1 ƒy 9) ƒ (7 ƒyƒn1) ƒy 9 2.) a) Identify the base in the following statement b) Solve for the amount. What is 81% of 285? 3.)a) Find the supplement of...
*April 25, 2011*

**Math**

Corinne rolls two six-sided number cubes with sides labeled 1-6. What is the probability that she rolls a 6 on both cubes? A. 1/36 B. 1/12 C. 1/6 D. 1/3 I think its A
*April 20, 2011*

**chemistry**

The legal limit for drunkenness is 0.08 ( 0.08 grams of alcohol per 100ml of blood). expired air contains the following main gaseous components by volume: 74.1% N2; 15.0% O2; 6.0% H2O; 0.9% Ar; and 4.0% CO2 at 37 degrees Celcius and 1 atm. Determine the density of ethanol.
*April 19, 2011*

**Math**

Which statement is correct? A. All intergers are rational numbers. B. All irrational numbers are whole numbers. C. A real number must be a rational number. D. A repeating decimal is an irrational number I think it's either A or C.
*April 18, 2011*

**Math**

I have three more questions I do not understand. 1. Two points (-1,1) and (3,-2) are graphed on a coordinate plane. What is the shortest distance between the points? A. 3 B. 4 C. 5 D. 7 I have no idea how to do this. 2. Which expression represents the nth term in the sequence ...
*April 18, 2011*

**Math**

Thanks so much!
*April 18, 2011*

**Math**

The chart shows the number of cars sold per week at a car dealership during the month of June. Salesperson Week 1 Week 2 Week 3 Week 4 Tim 4 8 2 1 Geena 1 2 7 1 Rafael 2 1 5 4 Sonny 4 1 1 10 How should the data be displayed to make the most convincing argument that sales ...
*April 18, 2011*

**Math**

Check my answer please? Yuri is wrapping presents. The first box measures 9 inches by 12 inches by 2 inches. He has a second box with dimensions that are each half of the length of the first box. How does the surface area of the second box compare with the surface are of the ...
*April 17, 2011*

**Math**

Could you please check my answer? Subtract: (6a+2b-5c)-(3a+2c) My answer was: 3a+2b-7c
*April 13, 2011*

**Math**

I'm confused on two questions that are kind of similiar: State the slope and y-intercept of y= -1/2x I know the slope is -1/2 but I don't know the y-intercept State the slope and y-intercept of y= 3x-4 I know the slope is 3, but I don't know if the y-intercept is 4...
*April 11, 2011*

**Math**

Vera wrapped a package that measured 8 in. by 10 in. by 5 in. Find the surface are of the package. I really don't know why I'm having trouble with this problem, but for some reason I just don't know where to start it.
*April 5, 2011*

**Math**

Which measure of central tendency best describes these data? 100, 5, 90, 95, 100 A. the mode only B. the mean and the median C. the mean only D. the median only I've never really understood central tendency
*March 31, 2011*

**Math**

Thank you!!
*March 31, 2011*

**Math**

B. every twenty-fifth name in the town's census directory
*March 31, 2011*

**Math**

Charlotte wants to conduct a survey to find out if the people in her town think that the town should build a new library. Which group of people would be a representative sample to survey? A. parents with children in middle school B. every twenty-fifth name in the town's ...
*March 31, 2011*

**Math**

What is the probability of drawing a heart or a diamond from a standard deck of 52 playing cards? I got 1/2, is this correct?
*March 30, 2011*

**Math**

Okay thanks
*March 30, 2011*

**Math**

What is the probability of rolling a number cube and getting an even number or a multiple of 3? I got 4/6 as the probability, but that isn't a choice. 6 is a multiple of 3 and an even number, so if I count 6 once, then I get 4/6 as the probability. But if I count 6 twice (...
*March 30, 2011*

**Math**

Okay, so the first quartile would be 40, right?
*March 29, 2011*

**Math**

You received scores of 70, 40, 70, 90, and 40. Find the first quartile. I don't even know what a quartile is.
*March 29, 2011*

**Chemistry**

When someone buys fish at the fresh fish market, they should smell the fish to test for freshness, the less “fishy” the smell the fresher the fish. I am supposed to explain the source and chemistry, including reactions, structures, and names of the compounds, behind ...
*March 28, 2011*

**marketing**

to encourage managers to disregard the criterion that a product-market segment should be substantial
*March 27, 2011*

**3rd grade math**

47 by 6
*March 27, 2011*

**Math**

Thanks, I was confused on this problem! And yes, that's what I thought when I read that gas was only $1.22!
*March 21, 2011*

**Math**

The gas tank of a car holds 20 gallons of gas. A gallon of gas costs $1.22. When the tank was filled it cost $20. About what percent of the tank was filled?
*March 21, 2011*

**Math**

Thank you both!!
*March 14, 2011*

**Math**

A molecule of water is made up of 2 atoms of hydrogen and 1 atom of oxygen. What percent of the atoms of a water molecule is oxygen?
*March 14, 2011*

**Penn Foster**

Haha!Glad someone finally got to bottom of this!Happened where I met some people and they said how it was easy to get their degree with getting answers of this site!Made me mad!
*March 8, 2011*

**geometry**

the ratio of the perimeter of two similar squares is 5 to 4. If the area of the smaller square is 32 square units, what is the area of the larger square?
*March 7, 2011*

**Math**

Okay I get it now. Thank you so much!
*March 1, 2011*

**Math**

I have no idea how to do this problem: Select the expression below that is equal to 4(9-m). A. 4m-36 B. 13-m C. 36-m D. 36-4m
*March 1, 2011*

**Math**

Thank you!!
*February 27, 2011*

**Math**

Could you please check my answer? I did this: 10+10=20. 5.49/20=0.2745 per battery 4+4=8 2.98/8=0.3725 per battery The better deal is if you buy the one 10 pack for $5.49 and get one free.
*February 27, 2011*

**Math**

Find the unit price and tell which is the better buy: Buy one 10 pack of AAA batteries for $5.49 and get one free, or buy two 4 packs for $2.98.
*February 27, 2011*

**Math**

Find the unit price and tell which is the better buy: A 64 oz. bottle of juice costs $2.39, and a 20 oz. bottle costs &0.79. You can use a 20-cents-off-coupon if you buy four 20 oz. bottles or a 15-cents-off-coupon if you buy a 64 oz. bottle. Which is the better buy?
*February 27, 2011*

**chemistry help**

so is it 900 and 4180 is that the difference???
*January 17, 2011*

**chemistry help**

a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree celisus and placed in two identical insulated containers. one hour later, the two containers are opened and the temperture of each substance is measured. the aluminum has cooled to 35 degree ...
*January 17, 2011*

**chemistry help**

a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree celisus and placed in two identical insulated containers. one hour later, the two containers are opened and the temperture of each substance is measured. the aluminum has cooled to 35 degree ...
*January 17, 2011*

**chemistry**

a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree celisus and placed in two identical insulated containers. one hour later, the two containers are opened and the temperture of each substance is measured. the aluminum has cooled to 35 degree ...
*January 17, 2011*

**Algrebra II-please check my answer**

Determine the zeros of the function 7x^2 + 9x = 0 answers were: {-9/7} {-9/7,0} {o,9/7} {9/7} I think the answer is {-9/7,0} but I'm not positive when I worked it-If this is wrong please steer me into the correct calcs because then I don't what I'm doing wrong 2....
*January 14, 2011*

**criminal justice**

Name some ethical dilemas that prosecutors have to face
*January 9, 2011*

**Algebra II-Thank you**

Thanks alot-At least I get one concept!
*January 7, 2011*

**Algebra II-Please clarify one thing for me**

Thanks Reiny-I really appreciate it-I get confused about taking the "h" at times So if they say h= (-5), then in the equation when it is written,it is positive and vice-versa, correct?
*January 7, 2011*

**Algebra II**

What is the equation of g(x) if the parent function is f(x) = x^2 and a = 2, h = -5 and k = 7 f(x) = 2(x-5)^2 + 7 F(x) = -3(x+5)^2 + 7 f(x) = 2(x+5)^2 + 7 f(x) = 2(x-5)^2 -7 I think it is 2(x+5)^2 + 7, is that right
*January 7, 2011*

**Math(Arithmetic)**

I need a factor tree is made for 126 .which numbers appear on the bottom rowhelp with
*January 4, 2011*

**Physics**

An airtight box, having a lid of area 12 in2, is partially evacuated. Atmospheric pressure is 15 lb/in2. A force of 108 lb is required to pull the lid off the box. The pressure in the box was:
*December 16, 2010*

**Physics**

A rock, which weighs 350 lb in air, weighs 226 lb when submerged in fresh water (62.4 lb/ft3). The volume of the rock is:
*December 16, 2010*

**Physics**

what equation do i use to figure that out?
*December 16, 2010*

**Physics**

A constriction in a pipe reduces its diameter from 4.0 cm to 2.0 cm. Where the pipe is wide The fluid velocity is 8.0m/s. Where it is narrow the fluid velocity is:
*December 16, 2010*

**Physics**

Water (density = 1.0 × 103 kg/m3) flows through a horizontal tapered pipe. At the wide end its speed is 4.0m/s and at the narrow end it is 5.0 m/s. The difference is pressure between the two ends is:
*December 16, 2010*

**science**

How many molecules of stearic acid are present in 2.00 mL of a 0.25 mM solution of stearic acid?
*December 15, 2010*

**science**

In a device like the one shown below, the cylinder is allowed to fall a distance of 300 m. As a result, the temperature of the water increases by 2.7°C. What would have been the increase in temperature if the cylinder were only allowed to fall 100 m?
*November 6, 2010*

**8th Grade Math**

1.183875 I recommend getting a TI-34 Multiview calculator.... Best one yet(:
*November 1, 2010*

**science**

for radio waves with a frequency of 454.4 nm, determine the wavelength, the energy of a photon and the energy of one mole of photns in kj/mol
*October 27, 2010*

**Math- practical purpose **

For many years, China has been the world's most populous country. However, India has been catching up, with 1132 million in mid-2007 and growing at 1.6% per year, versus China then with 1318 million and growing at only 0.6% per year. If these rates continue, when will ...
*October 25, 2010*

**science**

13 blocks in all but ends up on the east side
*October 20, 2010*

**socail studies**

yes but the summerains were counted as the ones who really settled it
*October 20, 2010*

**math correct not correct**

yay you got it just make sure to show your work " u
*October 20, 2010*

**6th grade**

a right angle is 90 degrees so mla must be acute because acute is less than 90 degrees
*October 20, 2010*

**spanish**

por mucho que means how much what i cant seem to answer biancas question can you answer it or help me try to answer it please
*October 20, 2010*

**chemistry**

a mixture of gases contains 0.4 mole of N2, 0.5 moles of O2, and 0.7 moles of H2. What is the partial pressure of O2 if the total pressure is 1.3 atm?
*October 19, 2010*

**Physics**

A ball is thrown straight upward and returns to the thrower's hand after 3.40 s in the air. A second ball is thrown at an angle of 29.0° with the horizontal. At what speed must the second ball be thrown so that it reaches the same height as the one thrown vertically?
*October 13, 2010*

**kwame nkrumah university , ghana**

freepassion_sam then we can start even if u have finished
*September 27, 2010*

**kwame nkrumah university , ghana**

give me your addy to help u out
*September 27, 2010*

**6th grade science**

one parent has brown eyes the other has blue eyes, if they have a child what is the percent that it will have brown eyes? blue eyes?
*September 24, 2010*

**Physics**

Aaah...Thank YOu!!!
*September 21, 2010*

**Physics**

Brett Favre is traveling from Minneapolis to Green Bay at 40mph. Aaron Rodgers is traveling from Green Bay to Minneapolis at 50mph. If they leave at the same time, how far from Minneapolis will they meet? Green Bay and Minneapolis are 260 miles apart.
*September 21, 2010*

**10th grade**

3 points on a line Q,P,R (In order) if QP =2x and QR =2x+1 and PR =21 Solve for x
*September 20, 2010*

**Chem Webwork help**

1. What is the pH when enough 0.10 M Base (in mL) is added to neutralize 8 mL of 0.10 M Acid? Complete the following table. NaOH HC2H3O2 2. What is the pH of the solution created by combining 2.60 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of ...
*July 12, 2010*

**college**

YOu come to work on a Monday morning and find that the office computer is not workingt. The system manager tells everyone that the computers hard disk crashed and that all data that were not backed up are lost. What do you do?
*June 23, 2010*

**Poetry**

my computer wint allow me to see this website or webpage.
*May 19, 2010*

**Poetry**

i need some examples of simile, metaphor, and personification. From not any website
*May 19, 2010*

**Math**

Increasing $100 by a certain percent produces the same result as decreasing $300 by the same percent. What is this percent?
*May 14, 2010*

**chemistry**

hydrogen and oxygen gas combine explosively to produce water. write a blanced equation for this process. if 10 mol of hydrogen reacted with oxygen, what volume of liquid water could be produced?
*May 6, 2010*

**Science**

2NO2. how many grams of NO2 will be produced with 5.00 moles of NO React? what would the working out of this be?
*May 6, 2010*

**physics**

two parallel conductors are located one above the other, with both carrying currents in opposite directions. As a result they repel each other. is the upper conductor in a stable state of levitation? b) Now we reverse one current so that the two conductors attract each other. ...
*April 18, 2010*

**Analogy**

Analogy: broom is to sweep AS brush is to _____________ 5 letter word that starts with either scr, spr, str, or thr. I've been trying to figure this out but I can't. I need help.
*April 14, 2010*

**5th grade**

Need help with an analogy. brother : mother fly : _ _ _ _
*April 14, 2010*

**Math**

Describe how a mathematical function is created. Be sure to include a discussion of dependent and independent variables, and the two sets called domain and range.
*April 14, 2010*

**Math**

A population of primates in a certain jungle is doubling each year. Describe how the population increases in size as a function of time. Give some example values for this population over time. Is this a linear or exponential relationship?
*April 14, 2010*

**Math**

Give two examples of linear relationships (they can be from the world of business, science, sports, or other areas). Since their graphs would be straight lines, describe the meaning of the slopes of these lines as they relate to these relationships
*April 14, 2010*

**Math**

Describe the basic differences between linear growth (a linear model) and exponential growth (an exponential model).
*April 14, 2010*

**Classroom Management Techniques**

The Nile perch population explosion has been accompanied by: a decrease in the dissolved oxygen in the shallowest portions of Lake Victoria. a decrease in the dissolved oxygen in the deepest portions of Lake Victoria. an increase in the dissolved oxygen in the deepest portions...
*March 22, 2010*

**social studies**

What would most likely happen if the Canadian government overruled the current laws protecting French language and heritage in the province of Quebec?
*March 21, 2010*

**MATH**

bjhkfghk.ghdlf; yuio;ryuieuh
*March 19, 2010*

**Chem**

How would increasing the volume of the reaction vessel affect these equilibria. You don't have to tell me the answers, but can you please explain to me how I get the answer. a) NH4Cl(solid) <===> NH3(gas) + HCL(gas) b) N2(gas) + O2(gas) <===> 2NO(gas)
*March 10, 2010*

**Chemistry**

Why does changing the volume of the reaction vessel have no effect on this equilibrium? CO(g) + Fe3O4(s) <===> CO2(g) + 3FeO(s)
*March 8, 2010*

**chemistry**

a chemist reacts 8.85g or iron with an excess oh hydrogen chloride to form hydrogen gas and iron(II)chloride.calculate the theoretical yield and the percentage yield of hydrogen if 0.27g H2 are collected
*March 7, 2010*

**CHEM**

If 335g water at 65.5 degC loses 9750 J of heat, what is the final temperature of the water?
*March 1, 2010*

**math**

Write as fractions. a. 1/2 of 3/4 b. 1/3 of 3/5 c. 3/4 of 1/6
*March 1, 2010*

**Chemistry**

If 430 mL of 0.837 M aqueous HNO3 and 23.5 g of solid Al are reacted stoichiometrically according to the balanced equation, how many grams of solid Al remain? Round your answer to 3 significant figures. 6HNO3(aq) + 2Al(s) → 3H2(g) + 2Al(NO3)3(aq)
*February 26, 2010*

**math**

an airline passanger fell asleep halfway to her destination. When she woke up, the distance remaining was half the distance traveled while she was asleep. What portion of the trip was she asleep?
*February 23, 2010*

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