Friday

March 27, 2015

March 27, 2015

Total # Posts: 196

**Math**

How do you find the angle, θ, between the vectors? If needed, round your answer to the nearest tenth. 1.) u = 2i - 3j v = i - 2j 2.) u = <3, 2> v = <4, 0>
*February 20, 2015*

**Math**

Hi! So this question kind of has two parts to it. If someone could help me with this, that would be great! Thanks! :) Juan lives in a large city and commutes to work daily by subway or taxi. He takes the subway 80% of the time because it costs less and he takes a taxi 20% of ...
*February 6, 2015*

**Maths Vector Helpppp**

The points A and B have position vectors, relative to the origin O, given by −−→OA = i+2j+3k and −−→OB = 2i+j+3k. The line l has vector equation r = (1−2t)i+ (5+t)j+ (2−t)k. (i) Show that l does not intersect the line passing ...
*January 19, 2015*

**world studies**

Ms.Sue i cant find the website for my world history book its from pearson ags global im in 9th grade and i need chapter 7 to look up some information to answer the questions on my worksheet can u please help me.
*December 23, 2014*

**world studies**

sorry the subject is world history
*December 23, 2014*

**world studies **

I have a worksheet the i have to answer but I didnt bring my S.S book cause I forgot it. can u please helped me with the following question. 1. In 100 years,the American Indian population went from 20 million to what million? A.60 B.8 C.6 D.4
*December 23, 2014*

**6th grade Math**

What two expressions could be used to represent the cost of a speeding ticket on (1) streets and highways and (2) in construction and school zones?
*December 22, 2014*

**Algebra 2**

so what's the correct answer Steve?
*December 11, 2014*

**Algebra 2**

find the real zeros of each polynomial f(x)=5x^3-40 Please show work I want to learn how to did it
*December 11, 2014*

**Algebra 2**

Factor 8x^3-1000y^6 Please show work!!!
*December 11, 2014*

**Pre Algebra**

I can purchase a 30-ounce bottle of juice for $1.80 or a 64 ounce bottle of juice for $3.20. How much do I save per ounc by purchasing the larger bottle? 30 divided by 1.80= .06 4 dividec by 3.20= .05 Subtraction .06 by .05 Answer = 0.1
*December 9, 2014*

**Math**

Direction:Write each power as a product of the same factor. Ten find the value. 1. 3^5
*December 4, 2014*

**history**

Under the Articles of Confederation, the central government could not a. borrow money. b. force states to provide money and soldiers. c. make treaties. d. resolve conflicts between states.
*December 4, 2014*

**6th grade Math**

Abraham earns $11.50 an hour. How many hours will Abraham have to work to earn $483? Please Show Work!!!!
*December 3, 2014*

**Math**

What are the steps in how to divide fractions? Give an example!
*December 2, 2014*

**Chemistry**

At 2000°C the equilibrium constant for the reaction is Kc = 2.4 ✕ 103. 2 NO(g) equilibrium reaction arrow N2(g) + O2(g) If the initial concentration of NO is 0.160 M, what are the equilibrium concentrations of NO, N2, and O2? I do not even know how to ...
*November 28, 2014*

**ethics**

Well lets look at it. This is speaking of logotherapy right? and logotherapy states: -Life has meaning under all circumstances, even the most miserable ones. -Our main motivation for living is our will to find meaning in life. -We have freedom to find meaning in what we do, ...
*November 28, 2014*

**algebra**

If it takes 4 ounces of insecticide to make 2/1/2 gallons of garden spray, how much spray can be made with 6 ounces of insecticide My answer was x=24 is it right???
*November 23, 2014*

**algebra**

I got 24 but I cant repeat the same answer
*November 22, 2014*

**algebra**

I got 0.6625 is that right???
*November 22, 2014*

**algebra**

I know I did but it gives me 1.5 and I know that u have to move the place value and it becomes 15 but that answer is already chosen from another problem that I just did and it can only be repeated once not twice how else can I write my answer to make it different instead of ...
*November 22, 2014*

**algebra**

I don`t get this question: A flagpole casts a shadow 32 feet long. If a man 6 feet tall casts a shadow 8 feet long at the same time and location, how tall is the flagpole?
*November 22, 2014*

**algebra**

Ms.Sue, can you please tell me am just waiting for you to answer.
*November 22, 2014*

**algebra**

what about the last 66/2/3% of PIT
*November 22, 2014*

**algebra**

ok thanks what about the question I asked u above
*November 22, 2014*

**algebra**

so your suppose to divide by the same percent to get the answer???
*November 22, 2014*

**algebra**

what about if it says the first 33/1/3% of dwarfs
*November 22, 2014*

**algebra**

ok thanks
*November 22, 2014*

**algebra**

the last 10% of CRYPTOGRAM II DONT GET THIS????
*November 22, 2014*

**algebra**

never mind i already checked thanks
*November 22, 2014*

**algebra **

the ratio of the weight of an object on jupiter to its weight on earth is 8 to 3. how much would a 100 pound person weigh on Jupiter? i`ll tell you the answer when am done solving so you can check if am right
*November 22, 2014*

**algebra**

is it 11.2
*November 22, 2014*

**algebra**

The ration of oil to vinegar in a certain salad dressing is 8:5. how much oil must be blended with 7 liters of vinegar for that recipe?
*November 22, 2014*

**algebra**

is it 50
*November 22, 2014*

**algebra**

A car travels 350 miles on 20 gallons of gallons of gasoline.How many gallons will be used to travel 875 miles under the same conditions
*November 22, 2014*

**algebra**

300 right
*November 22, 2014*

**algebra**

can u please check my answer
*November 22, 2014*

**algebra**

or is it 29.00
*November 22, 2014*

**algebra**

is it 0.3
*November 22, 2014*

**algebra **

If pencils sell at 6 for 59 cents,how many pencils can be bought for $2.95?
*November 22, 2014*

**algebra**

ok thanks
*November 22, 2014*

**algebra**

is it x=210
*November 22, 2014*

**algebra**

Is it 0.04 and some other decimals I did it like this 560x/560=24/560 and got x=0.042857143
*November 22, 2014*

**algebra**

Thank You
*November 22, 2014*

**algebra **

If there are 560 calories in 8 ounces of meat, how many calories are in 3 ounces of meat?
*November 22, 2014*

**algebra**

If a 2 cubic feet of sand weight 90 pound, how much do 5 cubic feet of sand weight?
*November 22, 2014*

**Algebra 2**

More About Complex Numbers squ. root 5+i/squ. root 5-i I don't know if you understand this equation, but could you help me.
*November 21, 2014*

**Law Studies**

How do I answer the question?
*November 15, 2014*

**Law Studies**

Right to express one's ideas and opinions freely through speech, writing, and other forms of communication but without deliberately causing harm to others' character and/or reputation by false or misleading statements. Freedom of press is part of freedom of expression.
*November 15, 2014*

**Law Studies**

no Ms. Sue
*November 15, 2014*

**Law Studies**

How does the first amendment protect free expression?
*November 15, 2014*

**Math**

Directions:Write the absolute value statement and the negative or positive number for the situation. The problem is in the bottom. 1. You entered an office building on the second floor and took the elevator to the fourteen floor.
*November 13, 2014*

**Math**

Thanks!!! :)
*November 13, 2014*

**Math**

How is -8 5/7, -8 3/10, and 6 1/4 written in decimal.
*November 13, 2014*

**Physics**

When maximum power is transferred to an external resistor R by a battery of emf E and internal resistance r, the ratio of r/R is? Answer 1:1 Can some please explain? Thankkks!
*November 2, 2014*

**Physics**

Three particles X, Y, and Z of masses 2 kg, 5 kg, and 4 kg respectively are arranged in order along a straight line. Y is 5.0 m from X and 7.0 m from Z. The distance of the centre of mass of the system of mass from X is? ANS: 6.6 m Help please? I dont even know how to start :(
*November 1, 2014*

**Writing **

In the other 6 groups there are 21 students in each of the 6 groups. *Does this sentence make sense.
*October 26, 2014*

**Math**

I don't understand you. Can you please explain the answer more!!!!!!!!!!!!!
*October 26, 2014*

**Math**

how did you get 900?
*October 26, 2014*

**Math**

10. Estimate 30% of the student population. You must show all of your work and provide an explanation. *There are 850 students.
*October 26, 2014*

**Math**

What does the word benchmark percent means?
*October 18, 2014*

**Algebra 2**

write an equation to solve each problem Briana and her sister Molly want to buy the same model bicycle. Briana needs $73 more before she can afford the bike. Molly needs $65 more. If they combine their money, they will have just enough to buy one bicycle that they could share...
*October 15, 2014*

**Math**

What percent o the student population are girls? Please show work! There are 22 girls
*October 13, 2014*

**Math**

There are 22 girls
*October 13, 2014*

**Math**

What percent o the student population are girls? Please show work!
*October 13, 2014*

**Chem AS**

When either chlorine or hydrogen chloride is passed over a heated metal M, the same chloride is produced. An aqueous solution of this chloride is acidic. Which one of the following could be M? A: Al B: Ba C: Cu D: Fe E: Na Ans: A Help w explanation please! Thanks!
*October 6, 2014*

**Chem AS**

On addition of aqueous sodium hydroxide to an aqueous solution of salt R, a white precipitate is obtained, soluble in an excess of the hydroxide. A white ppt is also obtained when R is treated with aqueous ammonia , but it is insoluble in excess. Which of the following could ...
*October 6, 2014*

**Physics Resistance**

A piece of wire of resistance, R and uniform cross sectional area, A is cut into four equal parts and bundled together to form a thicker wire. The resistance of the bundled wire is: A 16R B 1/4R C 4R D 1/16R It's either 16 or 1/16 im not sureee. So I need help for the ...
*October 5, 2014*

**Physics**

Two sources of equal amplitude undergo interference the energy at maxima is four times that due to either source is this a violation of the principle of conservation of energy. Explain. Can someone help me summarize a good model answer and further explanation of the answer? ...
*October 5, 2014*

**AS Physics**

A driver leaves his car without applying the hand brakes on a road inclined at an angle of 25 degrees. The car starts to roll down the road with the driver chasing from behind after moving a distance of 20 m the speed of the car is 5.0 ms-1. Calculate the coefficient of static...
*October 4, 2014*

**Chem**

Cyanohydrins can be made from carbonyl compounds by generating CN- ions from HCN in the presence of a weak base. In a similar reaction, -CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an Aldehyde and CH3CO2CH3? Option 1 : ...
*September 30, 2014*

**Chem Help!**

The presence of 11-cis retinal, C20H28O, in cells in the eye is important for vision. The structure of retinal includes an aldehyde group, a cyclohexene ring and a long aliphatic side chain, in which a carbon-carbon double bond exists between carbons numbered 11 and 12. Which ...
*September 30, 2014*

**CHEM HELP!**

A car burning lead-free fuel has a catalytic converter fitted to its exhaust. On analysis its exhaust gases are shown to contain small quantities of nitrogen oxides. Which modifications would result in lower exhaust concentrations of nitrogen oxides? 1 an increase in the ...
*September 30, 2014*

**Chem Help!**

Which pair of reagents will take part in a redox reaction? A CH3CH2OH + concentrated H2SO4 B CH3CHO + Tollens’ reagent C CH3CO2C2H5 + dilute H2SO4 D CH3COCH3 + Fehling’s solution Ans: B Someone please explain! Thanks! :)
*September 30, 2014*

**Chem help**

Which reaction of ammonia does not involve the non-bonding pair of electrons on the nitrogen atom? A NH3(g) + CH3I(g) → CH3NH 3+ I –(s) B NH3(g) + HCl (g) → NH4Cl (s) C 2NH3(l) + 2Na(s) → 2NaNH2(s) + H2(g) D 2NH3(aq) + Ag+(aq) → [Ag(NH3)2]+(aq) ...
*September 28, 2014*

**Chemistry **

Which process could be used to calculate the bond energy for the covalent bond X-Y by dividing its ∆H by n? A XYn(g) → X(g) + nY(g) B 2XYn (g) → 2XYn-1(g) + Y2(g) C Y(g) + XYn-1(g) → XYn(g) D nXY(g) → nX(g) + n/2 Y2(g)
*September 21, 2014*

**CHEM HELP :(**

The presence of 11-cis retinal, C20H28O, in cells in the eye is important for vision. The structure of retinal includes an aldehyde group, a cyclohexene ring and a long aliphatic side chain, in which a carbon-carbon double bond exists between carbons numbered 11 and 12. Which ...
*September 20, 2014*

**CHEM HELP PLEASE!**

Cyanohydrins can be made from carbonyl compounds by generating CN– ions from HCN in the presence of a weak base. In a similar reaction, –CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an aldehyde and CH3CO2CH3 in the ...
*September 20, 2014*

**pre algebra**

1. what is the sum of 5/6 + 2/3? a.1 1/3 b.1 1/2 c.1 2/3* d.1 3/4 2. sylvia has 6 1/2 boxes of chocolate to share at a family picnic. if she gives each person 1/3 of a box, how many people can receive chocolate? a.13* b.17 c.19 d.21 my answer=* please explain how you got your ...
*September 19, 2014*

**Chemistry Help!**

Cyanohydrins can be made from carbonyl compounds by generating CN- ions from HCN in the presence of a weak base. In a similar reaction, -CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an Aldehyde and CH3CO2CH3? Option 1 : ...
*September 19, 2014*

**Chen help!**

Cyanohydrins can be made from carbonyl compounds by generating CN- ions from HCN in the presence of a weak base. In a similar reaction, -CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an Aldehyde and CH3CO2CH3? Option 1 : ...
*September 19, 2014*

**Chem**

The presence of 11-cis retinal, C20H28O, in cells in the eye is important for vision. The structure of retinal includes an aldehyde group, a cyclohexene ring and a long aliphatic side chain, in which a carbon-carbon double bond exists between carbons numbered 11 and 12. Which ...
*September 19, 2014*

**Physics help please!**

Explain why the sum of the masses of the uranium nucleus and of the neutron does not equal the total mass of the products of the reaction. I guess its a theory question. Someone please explain!
*September 12, 2014*

**Physics Help!**

The Fly wheel has a small magnet of mass M mounted on it. Each time the magnet passes the coil, a voltage pulse is generated , which is passes to the c.r.o the display of the c.r.o is 10 cm wide . The flywheel is rotating at a rate of about 3000 revolutions per minute . Which ...
*September 11, 2014*

**Chemistry**

The relative molecular mass of a molecule of chlorine is 72. Which properties of the atoms in this molecule are the same? 1 radius 2 nucleon number 3 relative isotopic mass Answer: 1 only Can someone please explainnn! Thanks :)
*August 26, 2014*

**Chem**

Cyanohydrins can be made from carbonyl compounds by generating CN– ions from HCN in the presence of a weak base. In a similar reaction, –CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an aldehyde and CH3CO2CH3 in the ...
*August 25, 2014*

**AS Chemistry**

which ions are present in a solution of ethanol in an excess of concentrated sulphuric acid? 1 CH3CH2O- 2 CH3CH2OH2 3 HSO4- Explain please! Thanks :)
*August 22, 2014*

**Chemistry**

Full question: An alcohol of molecular formula C4H10O2 contains two OH groups and has an unbranched carbon atom chain. On reaction with excess hot potassium permanganate this alcohol is converted into a compound of molecular C4H6O4 To which carbon atoms in the chain of the ...
*August 22, 2014*

**Pure Maths**

Answer is dh/dt= m/min The volume when it's 1/8th full is Pi/12 I don't understand how they got that....
*August 16, 2014*

**Pure Maths**

I understand the rest but not the 1/8th of the volume part. Can you give me a further explanation on that? Thanks :)
*August 16, 2014*

**Pure Maths**

A container is in the shape of a right circular cone (inverted) with both height and diameter 2 meters. It is being filled with water at a rate of (pi)m^3 per minute. Fine the rate of change of height h of water when the container is 1/8th full(by volume). (Volume of a right ...
*August 16, 2014*

**statistics**

The students in your class with three children in their families are asked to state the number of boys in the family. What are the possible numbers? If X is the number of boys minus the number of girls in each of these families, state all the possible values of X. Make a table...
*August 4, 2014*

**Physics**

An astronaut of mass m in a spacecraft experiences a gravitational force F=mg when stationary on the launchpad. What is the gravitational force on the astronaut when the spacecraft is launched vertically upwards with an acceleration of 0.2g? A 1.2mg B mg C 0.8mg D 0 Ans= B ...
*July 1, 2014*

**Maths!**

Find the sum of all multiples of 5 between 100 and 300 inclusive. Ans: 8200 I do not know how to do this. Really do appreciate step by step workings and explanation. Thanks!
*June 7, 2014*

**Statistics**

How do you get 738/999??
*June 6, 2014*

**Statistics**

The registration numbers of vehicles in a certain country use digits 1-999. If a visitor has just entered the country. What is the probability that the first car he sees has at least 2 identical digits? Ans: 29/111
*June 6, 2014*

**Physics**

Intensity is the same? But the question states that it is halved? I don't quite get it........
*June 5, 2014*

**Physics **

A person is initially 8 m from a point sound source which emits energy uniformly in all direction at a constant rate. If the intensity of the source is to be halved but the sound is to be as loud as before, what distance should the person be from the source? Ans: 4 square root...
*June 5, 2014*