Friday

March 27, 2015

March 27, 2015

Total # Posts: 901

**Math**

A printing company makes plastic banners 15 feet long by 6 feet wide. An overseas customer wants to know about how many square meters the banner is. Use 1 foot = 0.305 meter. a 8.37 square meters b 27.5 square meter c 90.0 square meter d 900 square meter Is c the correct answer?
*March 26, 2015*

**Analytical Chemistry**

For a triprotic acid H2PO4. Ka1=7.11e-3, Ka2=6.32e-8 and Ka3=7.1e-13. 50mL each of 0.05F CaCl2 and 0.05F phosphoric acid were mixed. Ksp CaHPO4=2.6e-7. a) Would CaHPO4 precipitate when phosphoric acid and calcium chloride were mixed together? b) List all species (ions, ...
*March 24, 2015*

**college chemistry**

solid diarsenic trioxide reacts with Flourine gas to produce liquid arsenic pentaflouride and oxygen gas. Write the Qc for this reaction
*March 24, 2015*

**chemistry**

enthalpy of combustion of CO2=-393.5 kJ/mol enthalpy of formation of CO2 = -enthalpy of combustion of CO2 = -(-393.5 kJ/mol) = 393.5 kJ/mol number of moles of CO2 = mass CO2/molecular mass of CO2 = 35.2 g/ (12.01+16.0x2)g/mol =0.800 mol 1 mol of CO2 formed using 393.5 kJ 0.800...
*March 24, 2015*

**Science**

to stop a moving object, a force with the same magnitude should be applied at opposite direction.therefore: momentum of car + momentum of clay = 0 momentum of car = - momentum of clay mass of car x speed of car = mass of clay x speed of clay speed of clay = (mass of car x ...
*March 24, 2015*

**physis**

acceleration = (final velocity -initial velocity)/time = (40-20)m/s/4s =5m/s^2
*March 24, 2015*

**physics help **

Please explain the answers. Thank You 1. A rifle is fired horizontally over a large flat plane. At the instant the rifle is fired, a student drops a second identical bullet from the same height as the rifle. Which bullet hits the ground first? 2. A monkey is hanging from a ...
*March 19, 2015*

**Hate Math**

Consider the expression: (28/4). 5-6 + 4square. Explain the order of operations you would use to simplify this expression. then simplify it.
*March 12, 2015*

**Chemistry**

It's January in Nashville and your local weather station just informed you that the temperature outside is -4.37 degrees Celcius. You estimate the amount of ice on your driveway to be approximately 30kg. What is the minimum amount of sodium chloride in kilograms (kg) ...
*February 20, 2015*

**algebra**

A quarry shaped like a cone has a height of 42 ft and a diameter of 47 ft. What is the volume of the quarry? Round your answer to one decimal place and use 3.14 to approximate pi. ft3
*February 20, 2015*

**Math**

A survey of 59 customers was taken at a bookstore regarding the types of books purchased. The survey found 36 customers purchased mysteries, 28 purchased science fiction, 21 purchased romance novels, 15 purchased mysteries and science fiction, 12 purchased mysteries and ...
*February 18, 2015*

**algebra**

an isosceles triangle is one in which two sides are the same length. The perimeter of an isosceles triangle is 36cm if the length of the congruent sides is 4 times the length of the third side, find the dimentions of the triangle
*February 12, 2015*

**Algebra I**

Operations with Integers 6/25 [- 5/9] 6 * 5 ______ 5*5*9 Now I cancel the five on top and one of the five on the bottom. = 6/45 I don't know if I did the operation correct? Thank You for your help.
*January 28, 2015*

**Physics**

*this
*January 26, 2015*

**Physics**

are you sure you type his right because both car are moving in the same direction?
*January 26, 2015*

**MATH**

do you have to make the equation
*January 26, 2015*

**science**

assuming you're asking about centripetal force the equation for it is m*(v^2)/r
*January 26, 2015*

**Math**

Gina's teacher = 9:6 Gina = 4:3 A simple way to look at this is my seeing if gina's number of pints are multiples of her teacher's 3 is a multiple of 6 but 4 is not a multiple of 9 therefore the are not the same
*January 26, 2015*

**math**

If you wrote out all the numbers for top and bottom...such (11,10,...1) (6,5...1)/(12,11,10...1!(4,3...1) cross out ever number than matches o the top and bottom. when finish you should have 6 and 5 left on the top and 12 left on the bottom 6*5/12 The answer should be 2.5
*January 26, 2015*

**Algebra**

(1,5) (2,4) (3,3) (4,2) (5,1)
*January 26, 2015*

**Physical Science**

A hot metal spoon with a mass of 77.0 grams and a temperature of 95.0 degrees celsius is placed into a cup containing 100 grams of water at 20 degrees celsius. When the spoon and water reach equilibrium, they both have a temperature of 25 degrees celsius. What is the spoon ...
*January 26, 2015*

**fractional parts of a number**

Malcom has 200 coins.If one-fourth of coins are dimes and one-tenth of the remaining coins are pennies, how many pennies does Malacom have?
*January 16, 2015*

**Hist**

The average Northerner lost interest in reconstruction once it became reasonably certain that the former slaves: a) had economic decurity b)were guaranteed the vote c) would not be re-enslaved d)were guaranteed social equality
*January 14, 2015*

**Calculus (math)**

Consider the area between the graphs x+3y=35 and x+5=y2. This area can be computed in two different ways using integrals
*December 14, 2014*

**chemistry**

a radioisotope is called a tracer when it is used to
*December 7, 2014*

**math**

I got the answer Got Milk not sure if it is right, I have a friend that said he got when your nose runs your feet smell doesn't make sense to me?
*December 2, 2014*

**math**

I answered them and got the Answer Got Milk?
*December 2, 2014*

**math**

what is the answer to the famous farming exression, from creative publications pre-algebra with pizzaz
*December 2, 2014*

**english**

THANK YOU STEVE :)
*November 20, 2014*

**english**

approximately what is the value of a Japan Yen compared to a dollar? Use estimation, and I need to show math work. I have no idea
*November 20, 2014*

**Algebra 1 Check My Answer Please.**

2.Find the slope of a line that passes through (–2, –3) and (1, 1). The fraction one third.< 1 2 The fraction four thirds. 3.For the equation –4y = 8x, what is the constant of variation. –4 –2 1 < 2 4.Suppose y varies directly with x, and y = 24 ...
*November 15, 2014*

**Algebra 1**

2.Find the slope of a line that passes through (–2, –3) and (1, 1). The fraction one third. 1 2 The fraction four thirds. 3. For the equation –4y = 8x, what is the constant of variation? (1 point) –4 –2 1 2 4.Suppose y varies directly with x, and y = ...
*November 15, 2014*

**Algebra help**

Your cost c to buy w pounds of walnuts at $6/Ib represented by c = 6w A truck originally held 24 chairs. You remove 2 chairs at a time. The number of chairs n remaining after you make t trips is represented by n= 24-2t. The volume V remaining in a 243-ft^3 pile of gravel ...
*November 6, 2014*

**math**

360/4 = c
*November 5, 2014*

**algebra**

For the expression 4x-7, what is the smallest whole number value for x that gives a result that is more than 150?
*October 26, 2014*

**Math (sigma stuff!)**

I got it! n is a constant, so it's just 8/n * n(n+1)/2.
*October 25, 2014*

**Math (sigma stuff!)**

Hi! Looking to find n∑k=1 8(k/n) (n is supposed to be on top, k=1 below the sigma sign)in closed form. I've tried doing 8*[(n(n+1)/2)/n], and that didn't seem to work. I'm not sure if I'm supposed to do anything with the n or if it might be an issue with ...
*October 25, 2014*

**Social Studies**

Why do you think the Spanish felt they had the right to force the indians to work for them?
*October 8, 2014*

**math**

Change 2 2/4 to an improper fraction first
*October 2, 2014*

**Math help algebra**

You have a gift card for your favorite clothing store for the amount of $60. You have found a shirt you want to buy that costs $15. If you don't want to spend more than the amount of the gift card, which of the following inequalities could be used to determine the amount ...
*September 29, 2014*

**Electrophoresis**

You need to prepare 400 ml of a 4M glucose solution. It's chemical formula is C6H12O6 and its formula weight (FW) 180.16. Must show all work and calculation and then list what you will mix together to prepare the correct amount of this solution. 180.16 of glucose/400ml = x...
*September 26, 2014*

**Math**

1 5/6- 3/8= 1 5/6= 11/6 6 and 8 both go into 24 3/8= 9/24 11/6=44/24 44/24-9/24= 35/24=1 14/24
*September 24, 2014*

**Math**

My answers will be posted 2! 1. Dimensions of the cube is 5x3x1 a. What is the surface area? ( i said 46ft squared ) b. What is the # of cubes? ( I said 15 ) 2. Dimensions are 5x3x2 a. Surface area? ( 62ft squared ) b. # of cubes? ( 30 ) 3. Dimensions are 5x3x5 a. Surface area...
*September 24, 2014*

**math**

Tricycle because, tri means 3
*September 24, 2014*

**statistics 7**

Home values tend to increase over time under normal conditions, but the recession of 2008 and 2009 has reportedly caused the sales price of existing homes to fall nationwide (BusinessWeek, March 9, 2009). You would like to see if the data support this conclusion. The file ...
*September 23, 2014*

**statistics 3**

An airline promotion to business travelers is based on the assumption that no more than two-thirds of business travelers use a laptop computer on overnight business trips. 1. What is the sample proportion from an American Express-sponsored survey that found 365 of 543 business...
*September 23, 2014*

**statistics 2**

In Hamilton County, Ohio the mean number of days needed to sell a home is 86 days (Cincinnati Multiple Listing Service, April, 2012). Data for the sale of 40 homes in a nearby county showed a sample mean of 80 days with a sample standard deviation of 20 days. Conduct a ...
*September 23, 2014*

**statistics 1**

A study found that, in 2005, 12.5% of U.S. workers belonged to unions (The Wall Street Journal, January 21, 2006). Suppose a sample of 400 U.S. workers is collected in 2006 to determine whether union efforts to organize have increased union membership. Formulate the hypotheses...
*September 23, 2014*

**science**

An experiment was performed how the amount of coffee grounds could affect the taste of coffee. The same kind of coffee, the same percolator, the same amount a type of water, the same perking time, and the same electrical source were used. Identifying variables Independent, ...
*September 22, 2014*

**science**

MISS SUE HELP
*September 22, 2014*

**science**

A Scientist wonders if the amount of Vitamin C that he feeds to rats will have any affect on the rat's mass. He measured both the mass of the rats and the amount of vitamin C in grams. I need to find the Independent variable, Dependent variable and the controlled variable?
*September 22, 2014*

**math**

It would be (12,22) The pattern is 2n-2 with n being the input
*September 22, 2014*

**math**

On the third line you have the +25 and -25 they got rid of the -25 To do this they removed it from the bracket to the outside of the function But since it was in the bracket you cannot forget to multiply by the 3 that was on the outside This made the -25 a -75....and when you ...
*September 21, 2014*

**chemistry**

an x-ray photon of wavelength 0.989nm stricks a surface. the emitted electron has a kinetic energy of 969 eV.what is the binding energy of the electron in kj/mol?
*September 20, 2014*

**Science**

i didnt put the coefficients so its not balanced. I just wanted to show your the products
*September 19, 2014*

**Science**

C2H4 + O2 --> CO2 + H2O
*September 19, 2014*

**algebra 2**

The zeros are always the opposite sign of their value in the factors. Example: (x-2) The value in this factor is -2 but when you solve for x to find your zero it would be +2.
*September 19, 2014*

**Math**

Plug in (x-1) everywhere you see an x 4(x-1)^2 + 3(x-1)-3
*September 19, 2014*

**Science**

It should be A because the offspring should get one allele from each parent Say the yellow is YY and the green is gg I put it lowercase because I assumed it was recessive ..g...g Y Yg Yg Y Yg Yg
*September 19, 2014*

**Science**

Yes the dominant trait is usually what shows up in the phenotype.
*September 19, 2014*

**Science**

Sure what is it?
*September 19, 2014*

**Science**

I believe its C because chromosomes are made of DNA. And DNA carries genetic information.
*September 19, 2014*

**Math**

Lets evaluate D 6y-2=2(y-1) Now distribute the 2 6y-2=2y-2 Add two to both sides....in this case they cancel each other. Now we have 6y=2y The only number that will make this equal is 0. SO y=0 here. So D cant be the answer.
*September 19, 2014*

**Math help**

A. 20-x=x change this to 20= x+x What same two numbers add to 20? B. 20-x-6=0 Combine like terms 20 and -6 Now you have 14-x=0 Now solve for x C. x+4=3+x+1 Combine like terms 3 and 1 x+4=4+x In this problem the equations are the same. So there are an infinite amount of numbers...
*September 19, 2014*

**Math**

The problem is a quadratic function so that tells you right there that it has symmetry. Now you just have to find where. Because the problem says x= and not y= our problem with be rotated to the right Its rotated to the right because y can be any value whether positive or ...
*September 19, 2014*

**Pre-Calc Help!**

Yes
*September 19, 2014*

**Pre-Calc Help!**

First factor x^2-8x+15 You should get (x-5)(x-3) Now set each factor equal to zero and solve for x x-5=0 x-3=0
*September 19, 2014*

**Math**

x^4=625 To get x by itself you have to find the 4th root of 625. If you put this in a calculator in will give you 5. So your answer will be +5,-5 You have the put both the negative and positive 5 because the exponent is an even number
*September 19, 2014*

**Math Precal/Trig**

Before trying to distribute first simplify the problem
*September 18, 2014*

**Algebra 2**

5√7/√6 Multiply by √6/√6 to remove the radical from the denominator (5√7)/√6 * √6/√6 What does this give you?
*September 18, 2014*

**Geometry**

No it shouldnt be that small
*September 18, 2014*

**Geometry**

You will have to use the distance formula. Do you know what the formula is?
*September 18, 2014*

**math**

24/25 correct is a 96% score If she only did half as good then she got 96/2=48% on the second test She also got twice as many problems correct. 24*2=48 In this problem the number of problem she got correct is also her percentage. 48 divided by what number will give her a score...
*September 18, 2014*

**Geometry Please help**

Yes
*September 18, 2014*

**Geometry Please help**

First draw out your triangle . It gives you the length of two of the side Vertices (-2,9) and (-2,-3) have the same x values so the line is straight up and down. Find the distance between the y values to find the length of that side Vertices (-2,-3) and (7,-3) have the same y ...
*September 18, 2014*

**Math Gr 12**

Set equal factor to ≥ o (4x+1)≥0 (2-x)≥0 Now solve for x on each one
*September 18, 2014*

**math**

*there
*September 18, 2014*

**math**

It states that the are 1550 MORE ground crew members Because it says more you will add to 665 not subtract
*September 18, 2014*

**math**

Put all the sides in terms of x. X represents the longest side side x side y=(1/3)x side z=x-13 The perimeter is 106 which is the sum of all the sides. x+(1/3)x+(x-13)=106 Solve for x Then it will be easy to find the other sides
*September 17, 2014*

**Algebra**

well you already know the greater the width is the higher the temperature Now you just to put the widths in order. Because they all have different denominators you are going to have to find the least common denominator. 25,50,100,20,5= these are all factors of 100 So rearrange...
*September 17, 2014*

**math**

the ratio of tenants that own cats to tenants that own fish is 4 to 1 ..that is 4 times greater ? to 5 So if 5 own fish what would the of cat owners have to be to have the same ratio
*September 17, 2014*

**Math**

First change the mixed number to an improper fraction.
*September 17, 2014*

**math**

5n is correct it would be your score I guess you could put s=5n S meaning your total score
*September 17, 2014*

**Algebra 2**

To find the slope the equation must be in y=mx+b form To do this rewrite the equation with y by itself 4x+ky=-1 ↓ 4x+ky+1=0 ↓ 4x+1= -ky ↓ (4x+1)/-k=y Now y is by itself Now separate the equation with -k and the denominator 4x/-k + 1/-k =y is in y=mx+b form 4...
*September 17, 2014*

**MATH**

Are you solving for x?
*September 16, 2014*

**Algebra help**

rewrite the problem 7x^2=8x ↓ 7x^2-8x A=7 B= -8 C=0 Plug values in the quadratic formula
*September 16, 2014*

**Need Help with Math**

1/2 * 5/12 = 5/24 1/4 *5/6 = 5/24 1/3 * 5/8 = 5/24 I assumed it could have been random fractions.
*September 16, 2014*

**math**

x^3-18x^2+80 factors into (x+2)(x^2-20x+40)
*September 16, 2014*

**Sixth Grade Simplest Form**

Yes that is correct
*September 16, 2014*

**Sixth Grade Simplest Form**

yes
*September 16, 2014*

**Sixth Grade Simplest Form**

Since he tripled the recipe all you have to do is is multiply by 3 A. Oranges (1/2)*3=? Apples (3/5)*3=? Blueberries (1/4)*3=? Peaches (2/3)*3=? B. You have to change the mixed number back to a regular fraction. Do you know how to do this?
*September 16, 2014*

**math**

Im sorry but could you retype this in English
*September 16, 2014*

**math**

10m describes the height of the bridge from the ground
*September 16, 2014*

**math**

w ww.pitt.edu/~medart/image/glossary/rise.jpg This should help
*September 16, 2014*

**Math**

3*4=12 3=number of colors she can choose 4=number of colors to pick from
*September 16, 2014*

**Algebra**

Your answer is correct just make sure you put "{}" instead of parentheses
*September 16, 2014*

**math**

beginning ratio 5:7 Girls=30 Boys=42 ending ration 3:4 Boys=48 48/4=12 12*3=36 Girls=6 36-30=6 6 more girls joined
*September 16, 2014*

**maths**

What is the question?
*September 16, 2014*

**6th Grade Math**

Yes A is correct For B just find if 4 bags will give you 3 more pounds since you already have 10. To do this multiply (5/8) by 4 to see how many pounds it will give you. (5/8)*4=2.5 Four more bags Will Not cover the extra soil needed.
*September 16, 2014*

**math**

a=72 b=84 c=99
*September 16, 2014*

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