Wednesday

October 22, 2014

October 22, 2014

Total # Posts: 3,272

**science**

Pangea.
*October 2, 2010*

**math**

5/2v-4=7/2v Subtract 5/2v from both sides. -4=v
*October 2, 2010*

**Organic Chemistry**

separation and purification scheme how would i begin this? we have a mixture of the following:50% benzoic acid, 40% benzoin, 10% dibromobenzene they give us 1M NaOH, 6M NaOH, 1M HCl, 6M HCl, 1M NaHCO3, saturated sodium chloride, diethyl ether, 95% ethanol, methanol, isopropyl ...
*October 1, 2010*

**EARTH science**

density=mass/volume
*October 1, 2010*

**7th grade**

5x-10=2x-7 Add 10 to both sides. 5x=2x+3 Subtract 2x from both sides. 3x=3 Divide both sides by 3. x=1 This way is the more common method although Emily did get the correct answer.
*October 1, 2010*

**algebra**

13, 14 are wrong..I'm not going to check anymore..If you need help (step by step) on one or two problems, please re-post. It seems that you are just guessing.
*October 1, 2010*

**algebra**

Welcome back, Whitney. I have to leave for work but I checked as many as I could. Hopefully someone else can check the rest or I can check the rest later. I checked up to 12. They are all right except 4, 6, 7, 12 (5 I'm not sure about).
*October 1, 2010*

**geometry**

Not enough information.
*September 30, 2010*

**Math**

__-__/__+__=50 Are you sure you have the number sentence right? You can't subtract any of those numbers and end up with that solution. You can do this though.. (50*2)/(10/5)=50
*September 30, 2010*

**math need asap**

-16y+5y=-11y, not -21y..I think that's your mistake
*September 30, 2010*

**algbra **

Need more information..
*September 30, 2010*

**second grade**

Definitely not 2nd grade..
*September 30, 2010*

**college algebra**

-14-(18-(-4) -14-(22)=?
*September 30, 2010*

**math**

3:7 red candy: total candy, etc.
*September 30, 2010*

**math**

3 x 5 =
*September 30, 2010*

**math**

(n+9)/3=14 Multiply both sides by 3. n+9=42..I'm sure you can finish from here.
*September 30, 2010*

**math**

Are you solving for x or y?
*September 30, 2010*

**Math, Please help :/**

30+.85n=2.25n I'm sure you know how to solve equations..
*September 30, 2010*

**math**

What three do you have?
*September 30, 2010*

**math**

A fraction cannot be simplified if it is already in lowest terms..there aren't any more reasons
*September 30, 2010*

**spanish**

ellos (them)
*September 30, 2010*

**proper nouns**

fill in blank with the correct proper noun 1.we finally decided to buy a _____________.(proper noun) 2. during ___________ there was very little to do around here.
*September 30, 2010*

**math**

41, 42, 43, 44, 45, 46, 47, 48, 49..which one fits both conditions?
*September 30, 2010*

**math 5th grade**

2 is a factor of both 20 and 30..can you think of anymore? I think there are two more.
*September 30, 2010*

**math 5th grade**

4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100 These are the multiples of 4 up to 100. What number fits all of the conditions of your problem? (I actually think I see two that work..)
*September 30, 2010*

**vocab**

which make sense? 1. how can you expect to succeed at your new job when you are( diffused, predisposed) to believe that it is " not right" for you? 2. an economy in which the marketplace is considered "open" is one in which competition is more or less (...
*September 30, 2010*

**algebra**

Check your other post, already answered. Please don't repost.
*September 29, 2010*

**7th grade**

I just want to see a simple formula to solve linear equations
*September 29, 2010*

**7th grade**

This is a homework help website. You just post the subject, instead of grade, and ask a specific question. For example, if you don't understand how to do a math problem, post "math" for subject, and then post the problem.
*September 29, 2010*

**algebra**

I think you set it up like this..not positive though: 4(8n+6)=2(13n+2)+30n-28
*September 29, 2010*

**science**

Correct.
*September 29, 2010*

**math**

I'm sorry anonymous! You're right, I'm wrong.
*September 29, 2010*

**math**

10^3= 10000 Put the decimal after the 10 and move it over 3 places. Do the rest that way.
*September 29, 2010*

**Math**

I'm not sure, sorry.
*September 29, 2010*

**Math**

48? It appears that the x's are counting by 2's, and the y's are counting by 10's (starting at 8).
*September 29, 2010*

**algabra II**

No, we do not have nor would we give answers.
*September 29, 2010*

**Math**

It's not a multiple choice question, Bridgett, it's a multiple part question. Heather, I'll do part a for you and then you can do the rest the same way. You are just substituting into the equation. 3x^2+2x-3 (make sure this is right, I think you had a typo) a) x=-2...
*September 29, 2010*

**math**

Yup, Bridgett is right.
*September 29, 2010*

**math**

2.5 x 10^2=__x10^3 2.5 x 10^2= 250 .25 x 10^3=250 The exponent tells us how many places to move the decimal. If the exponent is positive, move it to the right. If the exponent is negative, move it to the left.
*September 29, 2010*

**science**

How does the pH of rainwater vary throughout the United States in Texas, California , Pennsylvania Kansas , Massachusetts and, Washington ? thank you
*September 29, 2010*

**math**

1, 2, 3, 4 to make 7 (4+3)x(2-1) 13 (4x3)+(2-1) 17 and 39, I can't think of..keep playing around with the numbers.
*September 29, 2010*

**Math**

Is this 3x+23=7x? Or is there a sign between the 7 and x? If it's 3x+23=7x.. 23=4x 23/4=x
*September 29, 2010*

**Algebra**

You just found out what they have in common. All of the terms have at least an x^2, so you can take that out. All of the numbers can be divided by 2, as well, so your GCF is 2x^2.
*September 29, 2010*

**Algebra help**

(x-1)^2=sqrt6^2 Take the square root of both sides. x-1=sqrt6.. you have to know how to finish from here
*September 29, 2010*

**5th grade math**

I'm pretty sure she meant 3142, 6328, & 4743.
*September 28, 2010*

**5th grade math**

The first step is to add those numbers up. Let me know what you get and I'll tell you what to do from there.
*September 28, 2010*

**algebra**

r+s=10 2r+4s=27 Multiply the first equation by -2 to cancel the r's. -2r-2s=-20 2r+4s=27 2s=7 s=3.5 Put s back into either original equation to solve for r (the first one would be easier).
*September 28, 2010*

**spanish**

What are the man and the children like in the painting? Who is the woman, and what relationship is between her and the girls. Write a description of the three people.
*September 28, 2010*

**college algebra**

Please see your other post, and avoid re-posting the same question.
*September 28, 2010*

**math**

Correct.
*September 28, 2010*

**Teachers Aide/Early Childhood Education and After-**

I think 17 is A.
*September 28, 2010*

**math**

-8+-7=-15
*September 28, 2010*

**english**

Good job!
*September 28, 2010*

**math**

xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx 4 x 8 = 32 The first number always goes down and the second number always goes across because 4 x 8 = 32 means 4 groups of 8. You can use any symbol, not just X's.
*September 28, 2010*

**math**

Find the two closest squares to 61 which is 64 and 49, so you know it has to be between the whole numbers 8 and 7.
*September 27, 2010*

**math**

An elf has a staircase with 10 steps to climb. Each step it takes can cover either one stair or two stairs. In how many ways can the elf climb the stairs?
*September 27, 2010*

**math**

26x>90 solve for x, x would be rounded up to the nearest whole number
*September 27, 2010*

**4th grade**

x + y = 40 x = y + 12 Use substitution to plug the second equation into the first. y + y + 12 = 40 2y + 12 = 40 2y = 28 y= 14 Plug y = 14 back into either top equation, x = 26
*September 27, 2010*

**math**

Prime means the number cannot be divided by any other numbers besides itself and 1. Composite is when the number can be divided. Try using a calculator to see if those numbers are divisible, or use divisibility tricks if you know them.
*September 27, 2010*

**math**

evaluate the following when x=-3, if possible /x/=/-3/=3 -x^2=-3^2=9 -(1+x)=-(1-3)=--2=2
*September 27, 2010*

**math probelm need serious help!!!**

Please have patience. Sometimes responses could take more than a few minutes. 4x-(9-3x)= 8x-1 Distribute 4x-9+3x=8x-1 Combine like terms 7x-9=8x-1 Get the variables (letters) on one side and numbers on the other.. Add 9 to both sides. 7x=8x+8 Subtract 8x from both sides. -x=8 ...
*September 26, 2010*

**algebra**

2x+3y=8 Bob said to subtract 3y from each side: 2x=-3y+8 Then divide by 2.. x=(-3y+8)/2
*September 26, 2010*

**Math**

It's quickest to change them all into decimals, and then arrange them: 2/3=.67 repeating (.666666etc7) 3/5=.6 31/50=.62 67/100=.67
*September 26, 2010*

**Teachers Aide/Language and other Barriers**

I think it's B.
*September 25, 2010*

**math **

Order of operations says to do parenthesis first. 2(-5+2)-3(3-4)-5 2(-3)-3(-1)-5 -6+3-5 -3-5=-8
*September 25, 2010*

**Math**

Lay out sixteen cards: the Ace, Two, Three and Four of all four suits (hearts, clubs, diamonds, and spades). Two players alternately turn down a card and add it to the common score, and the player who makes the score 22, or forces his or her opponent to go beyond 22, wins. To ...
*September 25, 2010*

**math**

8-7(4)+8(2)-13 8-28+16-13= Put those numbers into a calculator to solve.
*September 25, 2010*

**math**

Try this by plugging in -3 wherever an x is. Look at your other post to see how I did that one, since they're similar.
*September 25, 2010*

**algebra**

You just want to get v by itself. p=mv Divide both sides by m p/m=v
*September 25, 2010*

**algebra**

Try this one. I helped you with two.
*September 25, 2010*

**algebra**

Try to do this one. I helped you with two. Post your answers if you want them checked.
*September 25, 2010*

**algebra**

First subtract b from both sides. y-b=mx Then divide both sides by m (y-b)/m=x
*September 25, 2010*

**Science**

What are your choices...?
*September 25, 2010*

**English**

and you can't say #3
*September 25, 2010*

**math**

1.13 x 10^6
*September 24, 2010*

**algebra**

Wouldn't it just be 16x+10,000=21x? Do you know how to go from here?
*September 24, 2010*

**math**

2^3-7(2)^2+8(2)-13 8-28+16-13=? Not -31
*September 24, 2010*

**science**

but #1 cant be true because that isnt the definition for model
*September 24, 2010*

**science**

for 1. it is a model 2. it says prediction number 3 says hypothesis-based is this all true
*September 24, 2010*

**science**

there isnt
*September 24, 2010*

**science**

i need help at these. thx 1.the statement, " all living things are made of cells" is an example of _______. 2. a controlled experiment helps to eliminate the effects of unwanted ________. 3. ________ science emphasizes inquiry and observation.
*September 24, 2010*

**math**

If this is a right angle why does Henry not use the pythagorean theorum? Since the distances are just the speeds (thanks to the 1 hour) wouldn't it be X^2 + (4x+200)^2 = 2050^2?
*September 24, 2010*

**math**

Is this 7 1/3-2 5/6 (seven and one third minus two and five sixths)? Make sure to include spaces next time. If so... 7 2/6-2 5/6= 6 8/6-2 5/6= 1 3/6= 1 1/2
*September 24, 2010*

**Math**

You need to take the middle term (which is 18), take half of it (9) and square it (81). You then add that number to both sides.
*September 24, 2010*

**8th grade**

-x-6=-5 Add 6 to both sides. -x=1 So that means that x=-1.
*September 23, 2010*

**6th grade**

3.75+4/8=7.75/8=.96875
*September 23, 2010*

**reading**

How much time did Goodall spend with the chimps each day? Why is this meaningful?
*September 23, 2010*

**reading**

What was Jane Goodall's strategy for getting close enough to the chimpanzees to observe them?
*September 23, 2010*

**physics**

ooh.. ok. thanks :)
*September 23, 2010*

**physics**

A 15 g lead bullet is tested by firing it into a fixed block of wood with a mass of 1.05 kg. The block and the embedded bullet together absorb all the heat generated. After thermal equilibrium has been reached, the system has a change in temperature measured as 0.020 oC. ...
*September 23, 2010*

**6th grade**

Area could be 2 x 24, 3 x 16, 4 x 12, 6 x 8 (and vice versa). Perimeter equals 2L+2W. If the area was 2 x 24, the perimter would be 2(2)+2(24)=4+48=52. Do this with the 3 x 16, 4 x 12, and 6 x 8, and see which has the smallest perimeter.
*September 23, 2010*

**algebra**

4r-28+3>5r+10-23 4r-25>5r-13 Add 25 to both sides. 4r>5r+12 Subtract 5r from both sides. -r>12 Divide by negative one, so you have to switch the sign. r<-12
*September 23, 2010*

**math**

d+c=14 4d+2c=36 Multiply the top equation by -2. -2d-2c=-28 4d+2c=36 2d=8 d=4 c=10
*September 23, 2010*

**Writhing in Math**

What is the least possible number you can write with a 1 in the thousands place
*September 23, 2010*

**math**

14-8x<16 Subtract 14 from both sides. -8x<2 Divide both sides by -8. x>-1/4 The sign changed because we divided by a negative.
*September 23, 2010*

**algebra**

Yes.
*September 23, 2010*

**geometry**

ef+fg=eg, so 2x-19+3x-16=25, go from there
*September 22, 2010*

**writing**

I'm assuming it means to write a tale that you learned from. Write about when you learned an important lesson.
*September 21, 2010*

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