Sunday

December 11, 2016
Total # Posts: 28,464

**what about it ?**

y = -2 x -16 ???? you do not say what you want done

*November 29, 2016*

**linear programming**

did with linear programming, no need for simplex

*November 29, 2016*

**The Simplex Method**

164 at (8,12) http://www.wolframalpha.com/widget/widgetPopup.jsp?p=v&id=1e692c6f72587b2cbd3e7be018fd8960&title=Linear%20Programming%20Calculator&theme=blue max 10x+7y x+y<=20 x>=3 x<=8 x+y>=1 phony to fill all the blanks

*November 29, 2016*

**Algebra2**

(8^3)^x = 60 ?? 512^x = 60 x = log60/log512

*November 29, 2016*

**algebra**

looks like a letter V with the bottom on the y axis at -2 and slopes of 1 on the right and -1 on the left

*November 29, 2016*

**social studies**

Oh, sorry !

*November 29, 2016*

**social studies**

Van Buren was never president by the way.

*November 29, 2016*

**Social Studies**

I agree with you.

*November 29, 2016*

**Social Studies**

Well, it did not make slavery legal really in Massachusetts for example, but it said the owner could come get him which pretty much amounts to the same thing.

*November 29, 2016*

**Social Studies**

I guess, sort of.

*November 29, 2016*

**Social studies**

Even after they got here it happened google roger williams

*November 29, 2016*

**College Algebra**

2 ln (x-6) well I think x better be greater than 6

*November 29, 2016*

**precalculus**

(2x-1)/(x^2-1) = a/(x+1) + b/(x-1) 2x-1 = ax-a + bx + b 2 = a+b -1 = -a+b -----------add 1 = 2 b b = 1/2 a = 2-b = 3/2 so (3/2) / (x+1) + (1/2)/(x-1)

*November 29, 2016*

**Math**

(3 days/5 gal) * 60 gal = 36 days

*November 29, 2016*

**Math**

s = 5 R = 4 * 5 = 20 (5+x)2 = 20 + x 10 + 2 x = 20 + x x = 10 years from now 20 + 10 = 30

*November 29, 2016*

**Pre-Calculus**

let's put the center of each at 0,0 to make it easy ellipse x^2/a^2 + y^2/b^2 = 1 we could make a and b the same, but that would be a circle and too easy so lets make a = 2 and b = 1 x^2/4+y^2/1 = 1 then major axis along x = 2a = 4 vertex at -2,0 and + 2,0 (also at 0,1 and...

*November 29, 2016*

**Math**

equality wold be x = 5 inequality would be x < or = 5 which we write x </= 5 <5 means less than

*November 29, 2016*

**Math**

I told you above you can buy 1,2,3,4 or 5 but not 6 any positive whole number less than or equal to 5

*November 29, 2016*

**Math**

yes, but what are you going to use 0.454545.... of a CD for?

*November 29, 2016*

**Math**

11x <= 60 x<=60/11 since fractional CDs are not very useful x <= 5 I can buy 1,2,3,4 or 5 but not 6

*November 29, 2016*

**math volume**

I can not see your pictures but Base area = pi d^2 / 4 = pi in^2 base height = 3 pi in^3 = 9.42 in^3

*November 29, 2016*

**social studies**

The western hemisphere, from Brazil to the USA, experienced a huge INVOLUNTARY TRANSATLANTIC migration from Africa.

*November 29, 2016*

**math**

m minibuses m x number in minis n cars n y = number in cars 10 minibuses means m = 10 10 x in buses 6 cars means n = 6 6 y in cars so 10 x + 6 y = 150 but also 5x + 18 y = 150 now we have a plain old 2 eqn, 2 unknown problem multiply the second equation by 2 and we have: 10 x...

*November 29, 2016*

**Physics**

total mass = 2.5+1.2 = 3.7 kg omega = 2 pi f = 2pi/T = sqrt(2300/3.7) = 24.93 so T = .252 second normal force = m g = 1.2 * 9.81 = 11.77 Newtons max friction force = .56*11.77 = 6.59 when does m a = 6.59 N? 6.59 = 1.2 a a = 5.49 meters/s^2 magnitude of a = A omega^2 = A(24.93...

*November 29, 2016*

**Physics**

inward Ac = v^2/r tangential a = dv/dt 7.04 =sqrt[a^2 + (v^2/r)^2 ] 49.56 = 3.03 + v^4/289 v = a t = 1.74 t v^4 = 9.17 t^4 so 46.53 = 9.17 t^4/289 t^4 = 1466 t = 38.3 seconds Check my arithmetic!!!

*November 29, 2016*

**PHYSICS**

omega^2 R double omega, same R, four times 21.3 4*21.3 =

*November 29, 2016*

**Physics**

see http://www.jiskha.com/display.cgi?id=1480442177

*November 29, 2016*

**Algebra 2**

You are welcome.

*November 29, 2016*

**Algebra 2**

Now to check that with physics g is about 32 ft/s^2 T = 2 pi sqrt (80/32) T = 9.9346 seconds, close enough

*November 29, 2016*

**Algebra 2**

80 = .81 T^2 T^2 = 98.76 T = 9.94 seconds

*November 29, 2016*

**Algebra 2**

T = 2 pi sqrt (L/g) if you do physics I will look at your problem in a second

*November 29, 2016*

**Calculus - do not know a**

if t = 0 now y(0) = A 3^0 = A so A = 1000 and y(t) = 1000 3^(t/a) y(5) = 1000 3^(5/a) 100 = 3^t/a log 100 = (t/a) log 3 2 = (t/a).477 t/a = 4.19 y(t) = 1000 3^(t/a) let x = (t/a) y = 1000 3^x then dy/dx = ln 3 * 3^x dy/dt =dy/dx dx/dt dy/dt = ln 3 * 3^(t/a) *(1/a) dy/dt =(1/a)...

*November 29, 2016*

**I can not help**

Sorry, from Massachusetts.

*November 29, 2016*

**SALERY MONEY MATH HELP!**

well, start by thinking what is a 50% raise in all cases, original = 100 now 50% = 50 so now 150 instead of 100 now 100% = 100 so now 200 instead of 100 now 150% so now 250 instead of 100 In other words 150% raise is 150% more than original or 250% OF original. Two and a half ...

*November 29, 2016*

**Calculus**

Your turn

*November 29, 2016*

**Calculus**

s(1) = 0 s(e) = 1 so distance traveled in (e - 1) seconds is one foot v = 1/(e-1) = .582 ft/s d)

*November 29, 2016*

**Calculus**

trivial if constant acceleration a = 2(-1.5) = -3 ft/s^2 v = 60 - 3 t 0 = 60 -3t t = 20 sec average speed during stop = 30 ft/s so by the way distance =- 30*20=600ft

*November 29, 2016*

**Calculus**

a = 4 t -3 s(2) = 8-3 = 5

*November 29, 2016*

**Calculus**

v =ds/dt =d/dt [t ln 2t ] = t(2/2t) + ln 2t = ln 2t This is undefined at t = 0 a = dv/dt = 1/t I would pick none of above

*November 29, 2016*

**History**

No Person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution, shall be eligible to the Office of President; neither shall any Person be eligible to that Office who shall not have attained to the Age of THIRTY-FIVE...

*November 29, 2016*

**SELLING MATH!**

100 - 16 = 84 .84*573 = 481.32 which is more than 458.40

*November 29, 2016*

**maths**

6 w (w) = 5500 w^2 = 5500/6 get w then L = 6 w

*November 29, 2016*

**You want me to write a book?**

google causes of secession of south in 1861 for example: http://www.civilwar.org/education/history/secession/

*November 29, 2016*

**algebra**

Which ordered pair is a solution of y = x – 4? a. (?1, ?5) -5 = -1 - 4 yes

*November 28, 2016*

**Physics**

omega top = 5 * 2 pi radians/2.78 s = 11.3 radians/s omega = alpha t 11.3 = alpha (17.9) alpha = .631 radians/s^2 but is you want linear radial acceleration only that is Ac = v^2/r =omega^2 r = 11.3^2 * .0713 = 9.10 m/s^2 (close to 1 g :)

*November 28, 2016*

**Math**

or (10+5) (3 + .4) = 10(3+.4) + 5(3+.4) = 30 + 4 + 15 + 2 = 51 again, boring !

*November 28, 2016*

**Math**

or (10 + 5)(3.4) = 34 + 17 = 51 lo and behold !

*November 28, 2016*

**Math**

15 ( 3 + .4) = 45 + 6 = 51

*November 28, 2016*

**precalculus**

If you insist on using substitution the logical first step is x = -4 + y then -4 + y + 2 y = 5 3 y = 9 y = 3

*November 28, 2016*

**calculus need help studying now**

dy/dx = (x-2)^2+(x-7)2(x-2) d^2y/dx^2 = 2(x-2) +2(x-7)+2(x-2) = 2x - 4 + 2x - 14 + 2x - 4 = 6 x -22 zero at x = 11/3

*November 28, 2016*

**Math Question**

x^2 - 7 x = 12 - 4 y -y^2 x^2 -7x + 49/4 = 97/4 -4y -y^2 (x-7/2)^2 + y^2 + 4y =97/4 (x-7/2)^2 + y^2 + 4y + 4 =97/4+16/4 (x-7/2)^2 + (y+2)^2 = 113/4 sure enough center at x=3.5 , y = -2 r = (1/2)sqrt(113) = 5.32

*November 28, 2016*

**precalculus**

I would multiply the top eqn by 5.6 and the bottom one by 6.3

*November 28, 2016*

**Math**

tan 37 = htop/21 tan 28 = hlow /21 so htop + hlow = 21(tan37+tan28)

*November 28, 2016*

**precalculus**

cost = 4000 + 2.15 x rev = 3.50 x

*November 28, 2016*

**Math**

27/sqrt2 = 19.1 from home to mound tan a = 15/19.1

*November 28, 2016*

**no equal sign given**

Do not know what answer you want

*November 28, 2016*

**Maths**

e^0 = 1 so what happens when x = 0 ?

*November 28, 2016*

**Math**

5(0/10)+10/2=5 works:)

*November 28, 2016*

**SOCIAL STUDIES 7 GRADE**

1 d agree 2 c yes That Whitney guy 3 a yes 4 a yes I suspect but do not see chart(Ky,Md,Tenn?)

*November 28, 2016*

**Social Studies**

I tend to agree with you. He was no fan of slavery but wanted to stick within the law which defined the slaves as property at the time.

*November 28, 2016*

**ah, Betta :)**

2.5*4 = 8+2 = 10

*November 28, 2016*

**math**

rate is 40 person hours/ room (40 p hr/ r)/(4p) = 10 hr/room

*November 28, 2016*

**trig**

whew, good !

*November 28, 2016*

**trig**

you could say that r = -6 and theta = pi/2 but that is no good, r must be +

*November 28, 2016*

**trig**

x = 0 y = -6 that is 6 units directly below the origin so r = 6 = sqrt(0^2+6^2) you are three quarters of the way around to two pi

*November 28, 2016*

**trig**

Hey, sketch this stuff on a rough graph.

*November 28, 2016*

**trig**

r = 6 straight down = (3/4)(2 pi) = 3 pi/2 = 1.5 pi

*November 28, 2016*

**science**

No, I am not going to Google Young's modulus of steel for you, E L = 0.6 m r = 0.0025 m A = pi (.0025)^2 delta L/L = 2.5(9.81)/(E A) delta L = 0.6*2.5*9.81/(E*pi*.0025^2)

*November 28, 2016*

**maths**

(48 p/200g)500g = (5/2)*48 = 5*24 = 120p

*November 28, 2016*

**algebra**

x + x+15 = 43 2 x = 28 x = 14 x+15 = 29

*November 28, 2016*

**Physics**

assume constant torque = constant angular acceleration alpha omega = alpha * t theta = omega initial*t +(1/2)alpha t^2 129 * 2pi/360 = 2.25 radians so 2.25 = 0 + .5 alpha (36) alpha = .125 rad/s^2 omega = alpha t = .125*6 = .75 rad/s

*November 28, 2016*

**trig**

You are welcome.

*November 28, 2016*

**4 pi/3**

4 pi/3 = pi + pi/3 in quadrant three see your original question

*November 28, 2016*

**Asfand - your pi/3 problem**

is 4 pi/3 in third quadrant

*November 28, 2016*

**maths**

54/.75

*November 28, 2016*

**maths**

Huh? 6*5.8

*November 28, 2016*

**Physics**

v = omega r dv = omega dr omega = 2 pi radians/(24*3600)seconds dr = 18.2 dv = 2 pi (18.2) /(24*3600)

*November 28, 2016*

**maths**

No problem :) You are welcome.

*November 28, 2016*

**maths**

r^2 = 25 +25*3 = 100 so r = 10 tan theta = sqrt3 in quadrant III 60 degrees below x axis pi + pi/3 = 4 pi/3 you are in third quadrant because x and y are negative

*November 28, 2016*

**Math**

out = in / 10

*November 28, 2016*

**History**

no NO NO ! no Hey, google all four topics!

*November 28, 2016*

**Check Answers SOCIAL STUDIES PLEASE**

yes yes but perhaps more commonly D yes

*November 28, 2016*

**Math**

what if y = x^3 ----> y =x^1/3 is function y = x ---> y = x is function 2 y = x^3 + x ---> y+y^3 = 2x y(1+y^2) =2 x for x = 0 y = 0 or y = +/-i more than one value off y for x = 0, no, no for function

*November 28, 2016*

**SCIENCE**

I suppose 4, but I would call it habitat re-creation to combat habitat fragmentation.

*November 28, 2016*

**Social Studies**

C is certainly true historically but I do not know what period you are talking about. (Russo-Japanese war, World War 2 ??)

*November 28, 2016*

**What excerpt ?**

I do not see your excerpt. I would be inclined to agree with all of the above but have not seen what you read.

*November 28, 2016*

**SCIENCE**

LOL, that was easy ;)

*November 28, 2016*

**Social Studies**

Gee, Google it. I would go back to the original thin Spanish settlement claim to Texas, New Mexico, Arizona, California and parts of other states and the fact that they did not send a lot of settlers thereby letting people from the US settle. Be sure to cover the fact that ...

*November 28, 2016*

**Algebra 2**

They mean a,b,c,d by the way + and complex pair -5 +/- 2 i sqrt 5

*November 28, 2016*

**Algebra 2**

http://www.wolframalpha.com/widgets/view.jsp?id=3f4366aeb9c157cf9a30c90693eafc55

*November 28, 2016*

**Math**

6.8 min / 1 mile 30 min * 1 mile/6.8 min = 4.41 miles

*November 28, 2016*

**math**

1. yes 2. yes, works for any old y 3. just like 2 4. yes

*November 28, 2016*

**PHYS-041-Keiler: Physical Science**

assuming 5730 year half life a = Ai e^-kt a/Ai = .5 = e^-k(5730) ln .5 = -k(5730) k = 1.21 *10^-4 so a = 22 e^-(1.21*10^-4*11400) = 22 * e^-1.38 = 22* .252 = 5.54 kg

*November 27, 2016*

**physics**

T = 2 pi sqrt(L/g)= (2 pi/sqrt g)L^.5 = 1 second at 22 deg so you can get initial L dT/dL = (2 pi/sqrt g).5 /sqrt L dT/dt = dT/dL * dL/dt so what is dL/dt dL/L = 24*10^-6 dT dL /dT = 24*10^-6 L dL/dt = dL/dT *dT/dt = 24*10^-6 (-.625) L so dT/dt = [(2 pi/sqrt g).5 /sqrt L][24*...

*November 27, 2016*

**Physics**

assume I = (1/2) m r^2 for disk = (1/2)(6.5)(r)^2 Torque = I alpha where alpha = ang acceleration = a/r T = tension in rope so torque = T * r = I (a/r) T = I a/r^2 = (.5 m )a=.5(6.5)a now the block force down = m g force up = T ma = mg - T T = mg-ma = 2.5(g-a) so putting them ...

*November 27, 2016*

**Stoichiometry**

4.5 grams, look below at earlier question

*November 27, 2016*

**Math**

12 marbles to start drew one yellow 4/12 then 11 marbles of which 3 are yellow 3/11 so 4/12 * 3/11 = 1/11

*November 27, 2016*

**maths**

cost = 1040 - 240 = 800 (240/800)100 = 30% profit 12 * 6.50

*November 27, 2016*

**Stoichiometry**

(75/1000).6 = .045 mol CaCO3 = 100 g/mol so 4.5 grams

*November 27, 2016*

**Stoichiometry**

CaCl2 + Na2CO3 ---> CaCO3 +2NaCl one to one in mols of each 75 *.6 = x * .4

*November 27, 2016*