Monday

June 27, 2016
Total # Posts: 26,393

**disagree**

I would subtract first to eliminate y 65 y is in both
*January 11, 2016*

**physics**

P V/T = n R n and R are the same for both P1 V1/T1 = P2 V2/T2 P1 V1 T2 = P2 V2 T1 T2 = T1 (P2/P1)(V2/V1) luckily using degrees Kelvin so T2 = 300 (3.5/2)(12/15)
*January 11, 2016*

**physics**

first figure out what higher frequency the wall hears that frequency emmitted from the wall toward the car at that frequency then get the still higher frequency back at the car
*January 11, 2016*

**Physics**

east momentum positive initial 4.5 * 5 - 1.5 * 3 = 18 final 4.5 V1f + 1.5 V2f = 18 now energy (elastic means same before and after) (never happen:) initial (1/2)4.5(25) + (1/2)1.5(9) = 63 Joules after (1/2)4.5(V1f)^2 + (1/2)1.5(V2f^2) = 63 there you have 2 equations and two ...
*January 11, 2016*

**tilt**

I mean when(2t-2) when v = 10 10 = t^2 -2t + 2 t^2 - 2 t - 8 = 0 (t+2)(t-4) = 0 use + t so t = 4 a = 2 t - 2 = 6
*January 11, 2016*

**Physics - probably typo**

a = dv/dt = 2 t - 2 if you really mean when v = 2 we have to go back and find the times when v = 2 2 = t^2 - 2 t + 2 t^2 - 2 t = 0 t(t-2) = 0 t = 0 or t = 2 so a = 2 t - 2 = -2 or = 2
*January 11, 2016*

**Math**

4 = x^2 + 3 x ??? x^2 + 3 x - 4 = 0 (x+4)(x-1) = 0 x = 1 , -4
*January 11, 2016*

**us history**

Nope, think what we do around Boston. We are merchant shippers.
*January 11, 2016*

**us history**

I guess I will have to go with Hamilton et al then.
*January 11, 2016*

**us history**

whoops !
*January 11, 2016*

**Hip Hip HOORAY !!!!!**

Yes !! Somebody got one !!!!
*January 11, 2016*

**MATHS**

you kidding? x^6 - x^2 + x + c
*January 11, 2016*

**us history**

remember that "well ordered militia being necessary ...." phrase in there ?
*January 11, 2016*

**physics**

V = i R
*January 11, 2016*

**Math log equation**

5^a + 20*5^b = 0 a log 5 + log 20 + b log 5
*January 11, 2016*

**us history**

I vote for that, being from Massachusetts :)
*January 11, 2016*

**algebra**

6 k /(3 h) = 2 k/h
*January 11, 2016*

**Math**

log 10 [10^(3x-8) ] = 3x-8 log 10 [ 2^(5-x)] = (5-x)log 10[2] so 3x - 8 = (5-x)(0.301)
*January 11, 2016*

**Math**

I have a sneaking suspicion you might mean 10^(3x-8) = 2^(5-x) ???????????????
*January 11, 2016*

**Math**

70 is indeed smaller than 250. I vote for Ms. Sue
*January 11, 2016*

**Physics**

well, I guess if it zipped through empty space it is an electromagnetic wave with a speed of about c = 3 * 10^8 m/s I guess it is two dimensional space since no one is mentioning speed along the z axis so Vx = .43 m/s Vx^2 + Vy^2 = 9 * 10^16 Vy ^2 = 9 * 10^16 - 18*10^-2 LOL I ...
*January 11, 2016*

**Physics**

Note I assume x axis at 0 Bob used compass from N
*January 11, 2016*

**Physics**

Vector = magnitude (cos T i + sin T j ) i is x direction j is y direction Thus R x component = 145 cos 190 + 75 cos 288 + 210 cos 85 + 105 cos 355 R y component = 145 sin 190 + 75 sin 288 etc in the end |R| = sqrt (Rx^2 + Ry^2) angle = tan^-1 (Ry/Rx)
*January 11, 2016*

**Math**

The point is that we can help if you get stuck, but will not do your work for you.
*January 11, 2016*

**Bob**

http://www.jiskha.com/display.cgi?id=1452542999
*January 11, 2016*

**Math**

(2/3) / (1/2) multiply top and bottom by 6 (12/3) / (6/2) = 4 / 3
*January 11, 2016*

**why is everyoe expecting me to do all their work today**

I can not see your drawings. I am here to help if you get stuck. I took this in 1952 and do not need practice. Let's see where you get stuck, then ask.
*January 11, 2016*

**Math**

10/6 = 1 2/3 2/3 of 12 is 8 so 1 foot and 8 inches
*January 11, 2016*

**Math**

You are welcome.
*January 11, 2016*

**Math**

.6 x = 36 x = 36 / 0.6
*January 11, 2016*

**No you have to pay for that second one.**

sorry
*January 11, 2016*

**maybe try this**

http://www.imcpl.org/cgi-bin/fullbib.pl?bibno=1401051
*January 11, 2016*

**ELA**

Well, you can read free for two weeks here: http://www.scribd.com/book/249307735/Johnny-Tremain
*January 11, 2016*

**Math**

9 --> 0 is down 9 and then down more 0 ---> -6 = down 6 total down = 15
*January 11, 2016*

**HEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEELPP**

16 - Do you seriously not know what an isotope is ? 15 also ridiculous
*January 11, 2016*

**humm, some very easy ones**

I bet you know the answer to question 23 perhaps even 21 and 20 Please answer those then try the rest. I am not taking this course. I am only here to help you if you get stuck, not to do all the problems.
*January 11, 2016*

**Algebra**

y = m x + b m is the slope. b is the y axis intercept.
*January 11, 2016*

**Math**

function 1 is y = 3 and slope = 0 function 2 has slope = 3 3/0 is UNDEFINED
*January 11, 2016*

**Please scroll down**

Please stop asking the same questions over and over.
*January 11, 2016*

**Math**

I did this one, scroll down.
*January 11, 2016*

**math help..STEVE**

a 4 x 5 grid with 6 blocks shaded (1 point) 6 over 25, 30% 3/50, 6% 6 over 25, 24% 3/10, 30% ********* 6/20 = 3/10 = 30% --------------------- 11 B yes 10, not c 9 typos 8 D right 7 not B 6 not A 5 not D 4 not A 3 not C
*January 11, 2016*

**Math**

x = 65 - 2 y 2 (65 - 2 y) + 3 y = 105 solve that for y
*January 11, 2016*

**Math**

-3 x + 6 y = 18 - x + 6 y = 18 -------------------subtract -2 x = 0 x = 0 y = 3 So I get x = 0
*January 11, 2016*

**Math**

Well, usually increasing means going up to the right. (positive slope) Decreasing means going up to the left (negative slope) The question is poorly worded since the English words "goes up" really do not tell you the mathematical direction :)
*January 11, 2016*

**Math**

x + y = 90 x = 2 y - 30 (use that for x) ------------------------------ (2 y - 30) + y = 90 3 y = 120 y = 40 so x = 50
*January 11, 2016*

**Ms.Sue, Reed**

I do not see your answers. Try *******
*January 11, 2016*

**Chemistry-Dr.Bob**

Huh - who says? diesel is usually ignited (except when starting cold) by the increase in pressure and temperature resulting from compression in the cylinder. Gasoline generally requires a spark plug. (unless the cylinder or deposits in the cylinder get so hot they ignite ...
*January 11, 2016*

**PHYSICS**

ah - cute demo : http://www.youtube.com/watch?v=az1_4WjadlU
*January 11, 2016*

**PHYSICS**

Well, I suppose, but only in the sense that it is hard to change the direction of the axis of rotation. A bicycle is also stabilized by the rotation of the tires. The faster the spin, the more torque is needed to turn or tip the wheels. (torque = rate of change of angular ...
*January 11, 2016*

**math**

Do you mean the distributive property of multiplication? http://www.mathsisfun.com/definitions/distributive-law.html
*January 11, 2016*

**HISTORY HELP ME FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

For the Mayan one you only need the title
*January 11, 2016*

**HISTORY HELP ME FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

http://www.tulane.edu/~woodward/olemiss.htm
*January 11, 2016*

**HISTORY HELP ME FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

http://www.motherjones.com/rights-stuff/2011/01/no-haiti-no-louisiana-purchase
*January 11, 2016*

**HISTORY HELP ME FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

http://www.gilderlehrman.org/history-by-era/imperial-rivalries/timeline-terms/encomienda-system-established
*January 11, 2016*

**HISTORY HELP ME FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

http://mayantimeline.blogspot.com/p/science-and-technology.html
*January 11, 2016*

**HISTORY HELP ME FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

Miranda, I would be happy to help if you demonstrated any sign of having read about this at all. Please Google the subjects if you do not have a text book. It would do more harm than good for me to just tell you my answers. This is not even my subject.
*January 11, 2016*

**HISTORY HELP ME FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

Hey, you try first, then we help if needed. I do not needed for most of them. The Maya one is pretty funny !
*January 11, 2016*

**algebra**

fn = a + d(n-1) f(7) = a + 6 d = 72 f(10) = a + 9 d = 90 so 3 d = 90 - 72 = 18 d = 6 a + 6*6 = 72 a = 36 so our sequence is f(n) = 36 + 6(n-1) f(2) = 36 + 6(1) f(2) = 42
*January 11, 2016*

**incomplete**

into what size sections?
*January 11, 2016*

**Math**

well, I suppose the length of the rectangle (L = d = diameter is twice the width (r = radius) so 2 r + 4 r = 30 6 r = 30 r = 5 cm 2 pi r/2 = 5 pi of course the base of the semicircle is another 2r or 10 cm so if that counts we have 5 pi + 10 for the entire perimeter of the ...
*January 11, 2016*

**Physics**

F = m a .6 = m (.4) m = 1.5 kg .9 of that is the trolley so add: 1.5 - 0.9 = 0.6 kg
*January 11, 2016*

**Algebra 2**

(5-0) / (1+8) = (y-5)/(x-1) plug and chug
*January 11, 2016*

**Physics**

v = Vi + a t 0 = 20 + 5 a a = - 4 m/s^2
*January 11, 2016*

**basic technology**

100 kg * 9.81 m/s^2 * 6 m = 5886 Joules
*January 11, 2016*

**math - for example**

http://www.quora.com/Is-0-divisible-by-0
*January 11, 2016*

**No kiran, be careful**

0/0 is not zero. It is undefined.
*January 11, 2016*

**math**

division of anything by zero is undefined.
*January 11, 2016*

**geography**

6/24 = 1/4 1/4 of the way around the earth, westward of Greenwich England 360/4 = 90 degrees West Well, I am at 70 on Cape Ann, so about 1200 miles west of me. Mark Twain country.
*January 11, 2016*

**us history**

Yes.
*January 10, 2016*

**us history**

Yes
*January 10, 2016*

**us history**

Are you only allowed to pick one? http://www.landofthebrave.info/middle-colonies.htm No gold,few slaves but area was known as a breadbasket and indeed shipbuilding was major.
*January 10, 2016*

**Math**

Hey, what do you think ?
*January 10, 2016*

**Math**

Hey, do it the easy way, find the x axis intercept where y = 0 and the y axis intercept where x = 0 for each line. by the way #9 is a typo. Perhaps x = y ?
*January 10, 2016*

**us history**

I believe that you are correct.
*January 10, 2016*

**english**

A - dead B - dead c - transported D - likely dead
*January 10, 2016*

**maths**

A -- 1 tank/ 12 h = .08333 tank/hr B -- 1 tank/ 15 h = .06666 tank/hr C -- 1 tank/ 20 h = .05000 tank/hr time t hours .08333 t + .06666(t/2) +.05000(t/2) = 1 tank .14167 t = 1 t = 7.06 hours
*January 10, 2016*

**Physics**

How long to do 2 pi radians ? (a full circle) 1.06*10^-7 t = 2 pi t = 5.93 * 10^7 seconds how many seconds/day 1 day = 24*3600 s = 86400 s = 8.64*10^4 s 5.93 *10^7 / 8.64*10^4 = 6.86 * 10^2 days = 686 days
*January 10, 2016*

**dips international Jalandhar**

(360 km / 6 hours) * 9 hours = 540 km
*January 10, 2016*

**MATHS**

the slope of your line is 1/4 so the slope of any line parallel to it is 1/4 the slope of a line perpendicular to it is -1/(1/4) = -4
*January 10, 2016*

**Physics**

energy before hit = m g h = .2 * 10 * 20 = 40 J energy after hit = 10 J m g h = 10 2 h = 10 h = 5 meters
*January 10, 2016*

**maths**

Do you know how to copy a triangle congruent to the one in front of you? If you do that, you have your angle :) http://www.wikihow.com/Construct-Copy-of-a-Triangle
*January 10, 2016*

**mathematics**

sin Theta = 1/2 Theta = 30 degrees ( Very unsafe )
*January 10, 2016*

**physicss**

I can not be more mathematical than to say if you double the distance you divide the force by 4 2^2 = 4
*January 10, 2016*

**physicss**

force inversely proportional to distance squared (1/4)5 You can only do the second part if you know that the charges are equal. then as you pointed out Q^2 = 5/k
*January 10, 2016*

**math**

maybe sin (theta/2 ) = r/h
*January 10, 2016*

**Math!!!**

.78 http://stattrek.com/online-calculator/normal.aspx
*January 9, 2016*

**science**

Nah, how about oxidation of a hydrocarbon, particularly combustion? http://www.intel.com/content/dam/www/program/education/us/en/documents/project-design/react/react-presentation.pdf
*January 9, 2016*

**Math**

41.25/75 = 0.55 = decimal fraction of original price 0.55 * 100 = 55 % = percent of original price 100 - 55 = 45% = percent discount off original price
*January 9, 2016*

**Math**

You are welcome.
*January 9, 2016*

**Math**

1-0.40 = 0.60 0.60 * 475 = $285
*January 9, 2016*

**Maths**

c = a + n k 820 = a + 80 k 1040 = a + 124 k -----------------subtract -220 = -44 k so k = 5 820 = a + 80*5 = a + 400 a = 420 so c = 420 + 5 n if n = 180 then c = 420 + 80(180) c = 420 + 14,400 c = 14,820
*January 9, 2016*

**Geography**

If they drop their languages and customs and take up yours, they are more likely to be assimilated.
*January 9, 2016*

**Geography**

That is what your paragraph says.
*January 9, 2016*

**Maths**

11/x - 6/x = 3-3 5 = 0 x x = 5/0 which is undefined
*January 9, 2016*

**Algebra**

You are welcome.
*January 9, 2016*

**Algebra**

yes, y is 8 but it asked for z z = y-3 = 5
*January 9, 2016*

**Algebra**

3 cent = x 12 = y 15 = z x = 3 y z +3 = y 3 x + 12 y + 15 z = 243 3 (3y) + 12 y + 15 (y-3) = 243 get it ?
*January 9, 2016*

**Social Studies**

So what was number 1?
*January 9, 2016*

**Social Studies**

I guess so: http://www.pinterest.com/pin/520095456946189750/
*January 9, 2016*