Tuesday

May 26, 2015

May 26, 2015

Total # Posts: 21,060

**Math**

for elimination subtract as is y=-x+4 y=-2x-4 ------------- 0 = 1 x + 8 so x = -8 then get y = 8+4 = 12
*January 14, 2015*

**Math**

I did the earlier ones with elimination here is substitution y = (-x+4) so (-x+4) = -2x - 4 x = -8 then go back and get y y = -x + 4 = 8+4 = 12
*January 14, 2015*

**Math**

You are welcome.
*January 14, 2015*

**Math**

10 x - 8 y = 20 -10 x + 2 y = -20 ----------------- add 6 y = 0 y = 0 if y = 0 5 x = 10 x = 2 so the two lines intersect at (2 , 0)
*January 14, 2015*

**calculus**

1. If f(x) = ln(1 - 2x), then find f '(x) f' = [ 1/(1-2x) ]( -2) = -2/(1-2x) = 2/(2x-1) I do not understand your second function
*January 14, 2015*

**Math**

check it then 2 (9) - 5 (-7) = 53 ? yes -9 +5(-7) = -44 ? yes so it is right, why ask ? :)
*January 14, 2015*

**Calculus**

x = 15 t h = 5 t + 5 = 5(t+1) y^2=x^2+h^2 = 225t^2 + 25t^2 + 50 t + 25 y^2 = 250 t^2 + 50 t + 25 2 y dy/dt = 500 t + 50 now at t = 3 y^2 = 250(9)+150 +25 = 2425 y = 49.2 so 2(49.2) dy/dt = 1500 + 50 = 1550 dy/dt = 15.8 m/s
*January 14, 2015*

**Math**

add the two equations as is x = -10 5 y = 50 y = 10
*January 14, 2015*

**physics**

easier way work done = final (1/2) m v^2 4310 = (1/2)2520 v^2 v = 1.85 m/s ;)
*January 14, 2015*

**physics**

change of momentum = 2520 v average force = change of momentum/time F = 2520 v/t work = force * distance 4310 = 2520 v/t * 22.4 or v/t = .0764 or t = v/.0764 now if force were constant d = (1/2) a t^2 44.8 = a t^2 v = a t so a = v/t so 44.8 = v t = v^2/.0764 v^2 = 3.42 v = 1....
*January 14, 2015*

**Sixth Grade Math**

m = p - 3 = 51 - 3 = 48 yes, you did it right. Either the question was meant to be confusing or the person who wrote the question never asked the more complicated question he/she had in mind :)
*January 14, 2015*

**Socal Studies**

sorry: http://science.kqed.org/quest/2007/12/12/snakes-are-not-poisonous/
*January 14, 2015*

**physics**

mass has nothing to do with this work = force * distance in direction of force = 4.67 * 10^5 * 528 Joules
*January 14, 2015*

**Math**

multiply the second equation by 2 5 x - 4 y = 10 -20x +4 y = -40 ------------------ mow add -15 x = -30 x = 2 etc
*January 14, 2015*

**history**

You are welcome.
*January 14, 2015*

**history**

here: http://en.wikipedia.org/wiki/Iron_Brigade and Texas was very, very important to the Confederacy.
*January 14, 2015*

**history**

Oh my, oh my, you better Google Minnesota and Michigan Gettysburg
*January 14, 2015*

**Math**

24.8 / 0.6 = 41.3
*January 14, 2015*

**Math**

100 * 1382.5/27650 = 5 %
*January 14, 2015*

**english**

http://www.jiskha.com/display.cgi?id=1421282361
*January 14, 2015*

**english**

I did, scroll down to where you first posted this question.
*January 14, 2015*

**english**

( It is a real marine biology subject )
*January 14, 2015*

**english**

I gave you a reference for the lobster and the cod. Try. Read the article and see if you can come up with something.
*January 14, 2015*

**us history**

http://www.bostonmassacre.net/timeline.htm
*January 14, 2015*

**English**

might help: http://www.gma.org/lobsters/allaboutlobsters/society.html
*January 14, 2015*

**English**

Do cod eat baby lobsters? Do lobsters eat cod fingerlings? Are populations of both species likely to peak at the same time? ( I am more into math than English. )
*January 14, 2015*

**chemistry**

P1 V1 = P2 V2 P2 = 3 P1 P1 V1 = 3 P1 V2 so V2 = V1/3 = 5/3 liters
*January 14, 2015*

**Math**

(25/1000)(112000 = 2,800
*January 14, 2015*

**math**

1.325/.304 = 4.4
*January 14, 2015*

**math**

1.333 *1000 feet * (1 mile/5280 feet) = 1333/5280 = 0.2525 miles = 0.25 a little over a thousand feet is a little over a quarter of a mile by the way the Marianas Trench is more like 30,000 feet deep or over five miles
*January 14, 2015*

**algebra**

s = 2 k s-10 + k-10 = 23 s + k = 43 2 k + k = 43 3 k = 43 k = 43/3 = 14 1/3 s = 28 2/3
*January 14, 2015*

**science**

1. charged 2. pull 3. motion, work, potential energy(voltage), kinetic energy - beats me what they want her to say
*January 14, 2015*

**Hist**

It is not d.
*January 14, 2015*

**Physics**

A has a lower specific heat (heat capacity) Q = m C (T2-T1) for the same Q, lower C means bigger temp change
*January 14, 2015*

**Engineer**

You are welcome of course. Google water clock by the way.
*January 14, 2015*

**Engineer**

Water flows down because of gravity.
*January 14, 2015*

**Physics C**

force = E q force * distance = work done = Ke = Eqd so .880 = 64.0 * q * 0.500 solve for q
*January 14, 2015*

**Math**

Any time :)
*January 14, 2015*

**Math**

4 x = -12 x = -3 indeed
*January 14, 2015*

**Math**

Yes, that is correct
*January 14, 2015*

**Math**

3 (p - .35) = 3.45
*January 14, 2015*

**physics**

How far up from earth surface? 6.92 sin theta where theta is the angle up from horizontal mg opposite to up motion so g does negative work so - m g sin theta * (6.92)
*January 14, 2015*

**Algebra 1**

(2.5*10^-9)(1.5*10^3) = 3.75*10^-6 yes
*January 14, 2015*

**math**

7 (41/10) = $28.70
*January 14, 2015*

**Math**

t = 2h-4 h = 6 so t = 12-4 = 8 legs
*January 14, 2015*

**Math**

J + S + D = 5416 J = 1615 S = 6 D so 1615 + 6 D + D = 5416 7 D = 3801 D = 543 so S = 6 D = 3258
*January 14, 2015*

**Math**

.4 is bigger than .3
*January 14, 2015*

**Math equation**

No problem :)
*January 14, 2015*

**Math equation**

4 n = 6-5 = 1 n = 1/4
*January 14, 2015*

**Math equation**

I do not know for question 1. It could be + or -. My guess is that you are right. question 2 is 4 n - 6 = -5
*January 14, 2015*

**math**

(115 words/3 min)(7 min ) = 268
*January 14, 2015*

**math**

You are welcome ;)
*January 14, 2015*

**math**

elevation angle A = 45 degrees = pi/4 radians tan A = h/25 d tan A/dA = sec^2 A = (1/25) dh/dA so 25 sec^2 A * dA/dt= dh/dt = 5 dA/dt = (1/5) cos^2 A but cos^2 A = 1/2 dA/dt = .1 radians/second So I agrees but maybe you want degrees? .1 Rad/s( 180 deg/rad) = 18 degrees/second
*January 14, 2015*

**Math**

You are welcome.
*January 14, 2015*

**Math**

$20 per thousand ? 20*80 = 1,600
*January 14, 2015*

**Algebra 2 ( I doubt it)**

I bet you mean 9 x^2 - 100 (3x-10)(3x+10)
*January 14, 2015*

**trigonometry**

[sin T/cos T + cos T/sin T] /( sin T/cos T) = [ sin T + cos^2 T/sin T ]/ sin T = [ sin^2 T + cos^2 T ] /sin^2 T = 1/sin^2 T = csc^2 T
*January 14, 2015*

**algebra 1**

You are welcome.
*January 14, 2015*

**algebra 1**

If it is all under that square root sign then divide all the exponents by 2 25 x^2 z^4 y
*January 14, 2015*

**Math.**

You are welcome.
*January 14, 2015*

**Math.**

w = .5 x .5 * 120 = 60 grams
*January 14, 2015*

**math**

Mars 100 * 56.55/150 = 37.7% Moon 100 * 24.9/150 = 16.6% (about 1/6, remember that) Mars .377 x Moon .166 x .166 * 180 = 29.9 pounds (note 180/6 =30) 180 * 2.364
*January 14, 2015*

**math**

A. (x^1/2)^4√x^6 x^2 x^3 = x^5 B. I do not know if you mean (x^4)^.5 y^12 or (x^4 y^12)^.5 if the second then x^2 y^6 C if you mean (a^6 b^3)^1/3 then indeed a^2 b I am at a loss with your notation
*January 14, 2015*

**Physics 10 (helppp please) thannnks**

delta L/L = w /(E A) .008/120 = w/(E*6) w = 6 E * .008/120
*January 14, 2015*

**physica science**

When they are both in the same direction and therefore add. |R| = |A| |B| cos theta |cos theta| </= 1 for all theta and is max of 1 when theta = 0 5+7 = 12 If theta is the angle between vectors.
*January 14, 2015*

**algebra**

(-25/10)(1/A^2)( B^4) -25 B^4/(10 A^2)
*January 14, 2015*

**Physic**

https://iit.edu/arc/workshops/pdfs/Magnetic_Field.pdf
*January 14, 2015*

**mathematics**

L=(5x^2-4x-3) w=(x^2-x+1) h=(3x^2-5) use distributive property for multipication Lw: 5 x^2(x^2-x+1) = 5x^4-5x^3+5x^2 -4x(x^2-x+1)= -4x^3+4x^2-4x -3(x^2-x+1)= -3x^2 +3 x -3 add Lw = 5 x^4 - 9 x^3 + 6 x^2 -x - 3 for side areas 2 Lw = 10x^4-18x^3+12x^2-2x-6 do the same for top ...
*January 14, 2015*

**Algebra**

x - 9 = 6 x + 21 5 x = 30 x = 6
*January 13, 2015*

**Math**

85/100 = 17/20
*January 13, 2015*

**Science**

work = force * distanced moved in direction of force W = 10 * 1.5 = 15 Joules
*January 13, 2015*

**MATH**

Yes, it is D
*January 13, 2015*

**MATH**

NO! hey sketch both graphs for x = -1, x=+1, x = 0
*January 13, 2015*

**MATH**

Please sketch a graph. It is two V shapes identical except that one is 15 below the other.
*January 13, 2015*

**Math**

1/4 went 1/4 * 496 = 124
*January 13, 2015*

**math**

dimensions are length = 8+4 = 12 width = 4 +4 = 8 2 L + 2 w = 24 + 16 = 40
*January 13, 2015*

**algebra 2**

x = 0.04 t 25 = 0.04 t t = 25/.04 = 625 seconds which is about ten and a half minutes
*January 13, 2015*

**math**

You are welcome
*January 13, 2015*

**math**

yes 2.5 * 15 = 37.5 and 2.5 hours per day * 22 days = 55 hours
*January 13, 2015*

**physics**

It is going away so you hear a longer wavelength so LOWER frequency
*January 13, 2015*

**algebra 2 help typo?**

x+4 = 8/3 x = 8/3 - 12/3 = -4/3 or -x-4 = 8/3 x+4 = -8/3 x = -20/3
*January 12, 2015*

**alegebra 2 Help**

(x+h)^2 = x^2 + 2 h x + h^2 x(x^2 + 2 h x + h^2)=x^3 +2 hx^2+ xh^2 h(x^2 + 2 h x + h^2)=hx^2+2h^2x+h^3 sum=x^3 +3hx^2 +3h^2x+ h^3 etc
*January 12, 2015*

**alegebra 2 Help**

so continue [ x^3 -(x+h)^3 ] / [h x^3(x+h)^3]
*January 12, 2015*

**alegebra 2 Help**

[1/(x+h)^3 - 1/x^3 ]/h
*January 12, 2015*

**physics**

reaches top in 1.5 seconds v = Vi - g t 0 = 5 - 1.5 g g = 5/1.5 = 3.33 m/s^2 v = 15 - 3.33 t 8 = 15 - 3.33 t t = 2.1 seconds h = 15 t - (3.33/2) t^2
*January 12, 2015*

**Legal research**

Would you believe it says a digest is an index ? :)
*January 11, 2015*

**Legal research**

http://lawlibguides.byu.edu/content.php?pid=225319&sid=1961818
*January 11, 2015*

**Legal research**

I believe you are correct.
*January 11, 2015*

**math**

You are welcome.
*January 11, 2015*

**math**

M = 2 P- 4 so P + 2P-4 = 32 3 P = 36 P = 12 then Marc has 24 - 4 = 20
*January 11, 2015*

**legal research writings**

Then I suppose go with the dictionary. I do not think law dictionaries have pockets with updates, but I am not a legal scholar.
*January 11, 2015*

**legal research writings**

Well, I agree that a treatise might not be typically updated.
*January 11, 2015*

**legal research writings**

but I think you might just publish a new edition of a dictionary.
*January 11, 2015*

**legal research writings**

I think you might: http://en.wikipedia.org/wiki/Legal_treatise
*January 11, 2015*

**legal research writings**

Would you update treatises?
*January 11, 2015*

**Legal research**

Yes, Lucina is right http://www.acronymfinder.com/LexisNexis-%28online-legal-research-tool%29-%28LN%29.html
*January 11, 2015*

**Legal research**

go with Lucina, I just Googled it.
*January 11, 2015*

**Legal research**

sorry, Google shows: Lex-Nex
*January 11, 2015*

**chemistry**

mol of Na O H = 23+16 + 1 = 40 grams so 1 gram is 1/40 mol = .025 mol .025 mol = .2 mol/liter * x liters so x = .025/.2 = .125 liters or 1/8 liter
*January 11, 2015*

**Algebra Help Please**

here, for any old x x^0 * x^1 = x^(1+0) = x^1 so x^0 was 1
*January 11, 2015*