Sunday
December 11, 2016

Posts by Damon

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

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