# math, bobpursley

131,528 results

**Math CONTINUATION OF QUESTION FROM bobpursley**

Thank you for answering the question before bobpursley, I understand how you did the deriv of inside, outside, but how do I now do the second derivative since you have the extra -18x^2 in the numerator?? Thank you very much! (I suppose I have to brush up on my derivatives) ...

**Science-bobpursley**

Thanks for helping me with al those parts bobpursley. If you have time, can you also check my questions please. Thank you very, very much in return. My post is on the second page.

**physics-bobpursley/drwls please check**

bobpursley/ drwls please help me with my post on Sunday, April 15 at 10:16pm and 10:19pm. Thanks!

**Math**

Thank you Bobpursley

**algebra 2**

How is this problem done? IF f(x)=2x^2-8x-3 FIND f(-2) algebra 2 - bobpursley, Saturday, January 16, 2010 at 1:42pm Put in for x the value -2, and compute f(-2) algebra 2 - hellogoodbie, Saturday, January 16, 2010 at 1:47pm so is the answer f=21/2? if that is right, thank you ...

**algebra 2**

How is this problem done? IF f(x)=2x^2-8x-3 FIND f(-2) algebra 2 - bobpursley, Saturday, January 16, 2010 at 1:42pm Put in for x the value -2, and compute f(-2) algebra 2 - hellogoodbie, Saturday, January 16, 2010 at 1:47pm so is the answer f=21/2? if that is right, thank you ...

**Reiny or Damon or Bobpursley**

Express the series 11 + 18 + 27 +...+ 171 using sigma notation. Usually you would take 27-18 and that's the step between numbers, right? (I think its the k-value?) But 27-18=9 and 18-11=7. Are we stepping by k+2 here? Like k, k+2 k+4, k+6...? Please help me. I'm not confident ...

**acceleration estimate(bobpursley)**

Well, bobpursley explained this to me. I didn't understand this well. Since there was an error in the data, I am posting it again t(sec) v(ft/sec) 1 12.2 1.5 13 2 13.4 2.5 13.7 velocity of an object moving along a line at various times. How do I estimate the object's ...

**Physics**

A vertical spring with a spring constant of 450 N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30 kg block is dropped from rest. It collides with and sticks to the spring, which is compressed by 3.0 cm in bringing the block to a momentary...

**Chemistry!! - bobpursley please**

Calculate the maximum wavelength of light capable of removing an electron for a hydrogen atom from the energy state characterized by the following when n=4 =__________nm Responses Chemistry!! - bobpursley, Wednesday, October 22, 2008 at 4:05am So the two energy states are n=4 ...

**algebra 2**

Posted by hellogoodbie on Saturday, January 16, 2010 at 3:24pm. Posted by hellogoodbie on Saturday, January 16, 2010 at 2:59pm. How is this problem done? IF f(x)=2x^2-8x-3 FIND f(-2) algebra 2 - bobpursley, Saturday, January 16, 2010 at 1:42pm Put in for x the value -2, and ...

**physics repost bobpursley**

The energy given off by 300 grams of an alloy as it cools through 50°C raises the temperature of 300 grams of water from 30°C to 40°C. The specific heat of the alloy (in cal/g C ) is: i know Q=CpM(delta T) but what is what? Responses * physics - bobpursley, Monday, June 22...

**physic please check answers test tommoro**

bobpursley did i do the math problem right if not could u do it for me .thanke

**math**

bobpursley, I am confused to the equations that you have just posted. However, this is what I figured out but I'm not if it's correct. ((25+R)-B)+3N=435

**eth**

how do you think slavery influenced the evolution of both black and white america today? is there any websites that might help me with this question? As I was starting to answer your question, I had a conversation with BobPursley. He has summed this answer up better than I ...

**Math**

can you help me with the homework that I am doing right now that is math 4th grade work.Also I need the answers 16/36 We can help, but we wont provide answers. You have to work for them. bobpursley on Tuesday, January 16, 2007 at 7:12pm in response to Math.

**Physics, still don't get it!**

I'm sorry bobpursley I don't understand your response, please clarify. When an object of mass m1 is hung on a vertical spring and set into vertical simple harmonic motion, its frequency is 12 Hz. When another object of mass m2 is hung on the spring along with m1, the frequency...

**5th Grade math**

To: bobpursley - how do you teach a 5th grader how to figure out the answer?

**bobpursley**

thank you. :)

**bobpursley, math,correction**

Let n be a postive integer, then n+1 is the next integer. sum the squares of those noumbers: n^2 + n^2 + 2n +1=85 solve for n. so this is what i did. n^2+2n+1=85 n^2+2n=85-1 n^2+2n=84 n=7056+4n

**TO BOBPURSLEY**

CAN YOU HELP ME IN ETHNICS

**physics**

thank you bobpursley

**to bobpursley**

thank you so much!

**Math+ confused?!**

I had to solve for this: 1) choose 4 people from a class of 12 My answer: n=12 r=4 12C4 = 495 2) chosse 8 people from a class of 12 my answer: n=12 r=8 12C8 = 495 why is it that they both eqaul 495? maybe I am doing it wrong but I am confused why do they both equal 495? They ...

**Chem- bobpursley**

What mass of protons would be required to just neutralize the charge of 1.5 g of electrons? my teacher said .0015kg times 1e-/.00091e-27kg times 1pt/1e- times 1.67262e-27 over 1 p chem - bobpursley, Tuesday, September 21, 2010 at 6:48pm That is what I would do also. But I ...

**chemistry-mostly for bobpursley- I have a question**

ok i made a post with this question earlier: A carbon nucleus has six protons and six neutrons. How many electrons would it take to equal the mass of a carbon nucleus? u responded with this formula: 6*massproton+6*masscarbon=n*masselectron look up the three masses, solve for n...

**computer keyboard**

What does this ^ symbol mean in algebra or basic math. It means an exponent follows: 2^3 means two cubed, or 2*2*2 or 8. Thankyou Bobpursley

**bobpursley**

Thank You very much.

**TO BOBPURSLEY**

I have responded

**Honors Chem B**

Thank you bobpursley!

**to bobpursley**

is this the correct answer: 2m^-8n^-2/9m^2n^-6??

**To : bobpursley**

Please could you help me on my question:)

**algebra 2**

Posted by hellogoodbie on Saturday, January 16, 2010 at 2:59pm. How is this problem done? IF f(x)=2x^2-8x-3 FIND f(-2) algebra 2 - bobpursley, Saturday, January 16, 2010 at 1:42pm Put in for x the value -2, and compute f(-2) algebra 2 - hellogoodbie, Saturday, January 16, 2010...

**bobpursley: math cont**

find the equation (in slope intercept form) the line passing through the points with the given coordinate (-1,-1) (-3,-3) ok slope 1 y+3=1(x-(-3) y+3=1x-3 -3 -3 y=x-6.. correct?

**math**

Sorry my mistake. i had typed up the wrong question mr.bobpursley. What I meant to say was 66 2/3% of ____ = 74. I still can't understand how to figure this out? It is done exactly as I stated. I changed 66 2/3 percent to a fraction 2/3.

**bobpursley**

I revised my answers below. Thank you

**english**

bobpursley, but can you give me an example

**bobpursley**

Can you please answer my last post? Thanks -MC

**child care**

thanks bobpursley ok 6 is not b so i think is a? and 20 if its 25-30% its b?

**Mr. bobpursley**

Thank you for your time and frankness. I agree with you.

**math**

I posted this question yesterday and I got a response that is correct but I still don't understand how he got it. What did he do with the 2? how do i find the slope of the curve at the indicated point? f(x)= absolute value of x, x=2 math - bobpursley, Wednesday, September 16, ...

**Math**

Help me Bobpursley is dumb Serge invests $700 at 5.75% per year, compounded quarterly. When the account is closed, its value will be $950. How long will Serge’s money be invested?

**BOBPURSLEY LOOK AT MY OTHER ?I REPLIED**

yeah

**Thanks BobPursley!**

Thank you so much for all of your help! I understand now!!! : )

**science (bobpursley)**

what about flooding? is that one.

**Physics**

bobpursley can you show the equasions you are using

**Algebra 2 ..........BOBPURSLEY**

SO IF Y=0 what would x be on the graph. Please.. i do not get this...

**Physics**

bobpursley, is answering questions on this all you do?

**Bobpursley**

Look at my problem again please thanks

**msg bobpursley**

thanks for your help on the newspaper question.it was a really big help

**bobpursley**

ok and for this other question could you check my work please! h t t p : / /i 3 4 . t i n y p i c . c o m / s 2 z h m v . j p g

**Bobpursley plz help**

Can you please check my answers 3. Tx=2x+1,XW=x+7;TW Tx+XW=TW 2x+1+x+7+TW 3x+1+7=TW Answer: 3x+8+TW 4. WX=X+5,TW=4x+5;TX WX+TW=TX x+5+4x+5=TX 5x+5+5=TX 5x+10=TX

**Earht Science**

To bobpursley, the half life is 40.(potassium 40)

**to: bobpursley**

please help me with the last question, are the others all correct?

**MATH PLEASE HELP SUE**

# Math - bobpursley, Monday, September 14, 2009 at 5:24pm The base of the rectangle can go from 3 to 22 along the base. 3x22 4x21 5x20 6x19 ... 22x3 Ok, looks like to me it is 22-2 ways. # Math - Van , Monday, September 14, 2009 at 5:31pm sorry... i don't understand

**To: bobpursley or any math helper**

please help me on my questions, I have a big test tomorrow and I don't understand how to do some questions, please help me

**Art. bobpursley**

Thanks Bob, your answer made sense. x Nao x

**Please bobpursley help.algebra 2**

This is a critical question.. Why does y=3 represent a function and x=3 does not

**for bobpursley please check**

ok So The American Association of Labor legislation did what then n

**blood ex.**

Can you be more specific, bobpursley? I researched hydrogenase and Im not sure what to do...

**BobPursley**

h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 7 9 9 0 5 6 1 4 well it's on this page just CTRL+F Kate you can post here if you want thanks!

**Math**

I am still confused! Equation: C1V1=C2V2 Given: C1= 15 mM V1=? C2= 0.25 mM V2= 1mL (Do I just plug 1mL into the equation or do I have to convert to liter? Does mM mean mmol/1L?) I got ~17 microliter. Note: I must convert my answer to microliter. Math - bobpursley, Saturday, ...

**math 117 for bobpursley**

How about this one can you help me out on it?? 5*square root of 4 + 10*square root of 4

**Physics Help me Someone plz**

If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you Physics Plz help me - Anon, Monday, May 6, 2013 at 9:17pm 5.98x10^6 Thatz still wrong Physics...

**Bobpursley+Chemistry**

Hey Can you take a look at my previous post that you replied on.

**bobpursley**

like what are the steps to getting into a hospital is what prehospital means

**Algebra(repost of one question)**

Bobpursley: 89. Solve for x in the equation: (6/7)x - 6 = -2 I got x=28/3

**BOBPURSLEY PLZ FINISH HELPIN ME W/MY OTHER PROBLEM**

BASICALLY WHAT THE TITLE SAYS!

**bobpursley**

ok heres my work for one of the questions. sorry is taking long to upload them. h t t p : / / i 3 7 . t i n y p i c . c o m / 2 n k 4 9 7 c . j p g

**bobpursley**

2 3/5 = 6c 13/5= 6 You said to divide both sides by six can you show me an example please? Thanks!

**come back bobpursley**

i'm hoping you have my answer - i'm still working on it though

**algebra**

For this problem a/a-1- a-1/a=4 . Is the answer a=1 1/2. I solved it by multiplying a(a-1) both side as suggested by bobpursley. thanks

**chemistry**

Sorry bobpursley for the multi post< i kept posting it wrong. thanks for yur help

**Science (bobpursley)**

Why is an extra day added to February every four years?

**Physics-bobpursley please check**

This is the question I posted about two hours ago and I worked it out two ways-could you scroll down and check it, please?If I have a roller coaster, and hill 1 height is 50cm and hill height 2 is 25 cm and the PE is .9 as it approaches the top of hill 2, how do I calculate ...

**Question For Bobpursley!**

Can you give me some examples for how to solve quadratic equations? It would really help!

**bobpursley**

Can you please answer my post? I haven't been getting mine answered lately... Thanks -MC

**Caclulus, bobpursley HELP!**

Sorry for bothering you on this one question but I just replied to my original problem if you could help me with that.

**algebra**

This is a response to bobpursley's answer of Pr(0) = .3; Pr(1) = 7*.3; Pr(2) = 7*.7. Can you show me how you arrived at the above answers? Also, what does * mean? Thanks.

**Geometric Series (bobpursley)**

Could you please check my same post again, I had another question.

**to bobpursley**

if i was going on the same web you gave me and i wanted to study there,but if its a different book, what do i type in?

**PHYSICS, still cant get it**

A man (weighing 915 N) stands on a long railroad flatcar (weighing 2805 N) as it rolls at 18.0 m/s in the positive direction of an x axis, with negligible friction. Then the man runs along the flatcar in the negative x direction at 40.00 m/s relative to the flatcar. What is ...

**physics- response to bobpursley**

which is false? Consider the following processes: I. Energy flows as heat from a hot object to a colder object II. Work is done on a system and an equivalent amount of energy is rejected as heat by the system III. Energy is absorbed as heat by a system and an equivalent amount...

**to bobpursley**

In my heads/tails question- why isn't it 1/6? I flip a coin three times, aren't there only 6 possible outcomes?

**To: bobpursley**

Can you please check my other science posts as well. They are still on the 1st page, thank you very much:-)

**math correctionplz**

can someone correct these also for me.. Which of the following is not a polynomial? a) 24 b) 4x^3+5x-1 c)2x-(1)/(x) d)3xy^2+xy MY answer is: A Simplify. write your answer with only positive exponents (y^5)/(y^10) Possible answers: a)y^2 b)(1)/(y^2) c)(1)/(y^5) d) y^5 My answer...

**math**

your basement has an 8 3/12 foot ceiling.To the nearest half foot,how tall is the tallest cabinet that can fit in the basement. it doesn't say how tall and wide the door bobpursley.

**math**

your basement has an 8 3/12 foot ceiling.To the nearest half foot,how tall is the tallest cabinet that can fit in the basement. it doesn't say how tall and wide the door bobpursley.

**math**

Is this the correct answer? PV=-50,000+180,000/1+r+180,000/1+r squared=250,000 Responses math - bobpursley, Monday, April 6, 2009 at 12:38pm does r have a value? math - anonymous, Monday, April 6, 2009 at 12:48pm oh yes, r=20%

**physics Again**

bobpursley can you please check my reply to your post about my question? I am not sure if I did my equation correctly. Thanks

**bobpursley!**

Sorry again but I have two questions. Is this right? 1/5 m= 22 final answer m= 11/55. Seconde how would I do 2/3c = 5.9 Thank you so much!

**physics**

Bobpursley; you helped me with my question and I am a little stuck how would I find distance if I don't know time and vice versa?

**bobpursley**

write the equation of the ellipse with foci at (0, -sqrt3) and (0, sqrt 3) and for which 2a=4 i've done this befoe, but with squareroots as endpoints. and if 2a=4, a=2, right? Please help me.

**to bobpursley**

I don't understand any of the information you gave me to solve the problem. Ok, write the two equations ( I did one). Now graph them. Where do they cross?

**bobpursly**

Ok so I am still coming up with problems is it possible for bobpursley to answer this: why does Centripetal force increase with frequency, and same with radius? Thanks for the help

**bobpursley -science**

sorry my question is explain simply why aluminium is cheaper than gold with reference with the reactivity series. thanks again for your help

**Math (is this right bobpursley)**

147.5/1000= 0.1475 86.5/1000= 0.0865 Therefore 0.1475 x 0.0865 =0.0128m^2

**SAT score**

bobpursley you were right. i had gotten my scores by email in exactly 21 days, but i hadn't checked it. i got a 1570

**Science (bobpursley)**

Does mass increase or decrease when the distance stays the same and the force of gravity between two objects decreases?

**Physics- drwls please check**

Good morning. This is a repost. The system is telling me my calculations is incorrect. I thought a fresh pair of eyes would help. Suppose a monatomic ideal gas is contained within a vertical cylinder that is fitted with a movable piston. The piston is frictionless and has a ...