Sunday
May 29, 2016

Posts by Damon

Total # Posts: 26,282

algerbra 2
4 - x so?
January 6, 2016

Math
the total passing speed is 180 km/hr the distance is 600 m = 0.6 km so t = d/s = .6 /180 = 1/300 hour (1 hr/300) * 3600 s /hr = 12 seconds
January 6, 2016

Math
They want minutes so do it all in minutes 4 seconds = 4/60 = 1/15 minute half hour = 30 minutes 30 = 4 + (1/15) t 26 * 15 = t t = 390 minutes (which is 6.5 hours)
January 6, 2016

Subject-verb agreement
I agree on A and D You are right I suppose about measles in theory but surely you would say: "Measles spreads". Although C may be correct, I object. In fact, physics is easy to learn.
January 6, 2016

Math
A = 1/8 job/day B = 1/4 job/day A + B = 3/8 job /day which is 8/3 days per job (8 days/3 jobs) 10 Hours/day = 80/3 hours/job = 26 2/3 hours
January 6, 2016

Math
multiply 1.2 * 1.1 = 1.32 so the price increased a total of 32 percent. 6600/1.32 = ?
January 6, 2016

Math
A * 1.2 = B A * 1.2 * 1.1 = C = 6600 so A = 6600/(1.2*1.1)
January 6, 2016

Math
after the first spending spree he has 0.85 M left then he wanders into the horse track and spends 0.6 of that so he has 0.85 M * 0.4 = 4080 M = 4080/(.4*.85) = 12,000
January 6, 2016

Oh come on
You are asking us to help and have not even tried? All of us here have already passed the subject. We do not need practice taking percentages. Please post your attempts. Do not expect us to just do homework or exams for you.
January 6, 2016

Physics
(1/2)mv^2 = .5 (0.500)(300)(300) J
January 6, 2016

ELA/Social Studies
Well, what position do you intend to apply for? You are applying. I am not applying. Let's see your work first. I bet someone here would be willing to help at that time.
January 6, 2016

Social Studies
General MacArthur ? http://history.state.gov/milestones/1945-1952/japan-reconstruction
January 5, 2016

Algebra 1
http://www.jiskha.com/display.cgi?id=1452020437 Start trying to do them and stop asking us to do it all.
January 5, 2016

Algebra 1
Henry and I have both done this already, scroll down.
January 5, 2016

Algebra 1
Yes, but no need to ask is there?
January 5, 2016

Algebra 1
to eliminate y, multiply the first equation by 5 and the second equation by 3: 20 x + 15 y = 60 21 x + 15 y = 78 --------------------subtract -1 x = - 18 so x = 18 so 4(18) + 3 y = 12 72 + 3 y = 12 3 y = -60 y = -20 ----------------------- check that to be sure 7(18) + 5 (-20...
January 5, 2016

Algebra 1
4x-y=23 7x+y=21 ------------so add instead to eliminate y 11 x = 44 x = 4 well that is better 7(4) + y = 21 28 + y = 21 y = -7
January 5, 2016

Algebra 1
4x-y=23 7x-y=21 ------------subtract to eliminate y -3x =2 x = -2/3 I suspect that you have a typo
January 5, 2016

History
What is due south of Florida's capital city ? :)
January 5, 2016

History
Look at a map ! East of East Florida is the Gulf stream, the bleak Atlantic, then Africa
January 5, 2016

Algebra 1
It tells you to use substitution and you already have y, all alone on the left. It is (-3x+6) so use that. substitute it for x i the other (first) equation 4 x + 2(-3x+6) = 10 4 x - 6 x + 12 = 10 2 x = 2 x = 1 y = -3(1) + 6 = 3
January 5, 2016

Math: Ratio
4/3 = b/g so b = 4 g/3 4/5 = (b-160)/g or 4 g = 5 (4g/3 - 160) 4 g = 20 g/3 - 800 12 g = 20 g - 2400 so 8 g = 2400 g = 300
January 5, 2016

MATHEMATICS
Look at this to see how: http://www.jiskha.com/display.cgi?id=1279831346
January 5, 2016

algebra TYPO
(1/sin)(1/sin-sin)+ sin-cos/sin+cos/sin You have no = sign I suspect also careless parentheses
January 5, 2016

math
L + w = 24 20 + 4 19 + 5 18 + 6 17 + 7 16 + 8 15 + 9 14 + 10 13 + 11 12 + 12 seems to be nine
January 5, 2016

math
a*1000 + b*100 + c*10 + d a = 2c c = b-1 b = 5 then c = 4 and a = 8 so 8,54d You said nothing about the ones digit.
January 5, 2016

math
the inside rectangle area is 35*17 the outside rectangle area is 40*22 subtract the inside from the outside.
January 5, 2016

algebra
(4/3) pi r^3
January 5, 2016

Math
(x/4 ) *4 = (-5) *4 so x = -20
January 5, 2016

Algebra 1
Exactly
January 4, 2016

Algebra 1
Yes, but figure out why.
January 4, 2016

Algebra 1
terry = 15 + 10 t susan = 9 + 12 t so 15 + 10 t = 9 + 12 t 2 t = 6 t = 3 hours
January 4, 2016

math
You should get; 1 0 5 0 1 -2
January 4, 2016

math
http://www.gregthatcher.com/Mathematics/GaussJordan.aspx
January 4, 2016

math
+7 -3 41 +2 +5 00
January 4, 2016

j
turn IN line
January 4, 2016

Algebra 1
graph the line w = 190 - L everything under and including that is shaded graph the line L </= 110 it is horizontal or vertical depending on which axis you chose for width everything left or under that is shaded where the two shadings unite, that is your region.
January 4, 2016

Algebra 1
the sum of the width and length can be no more than half of 380 the length must be at least 110
January 4, 2016

Algebra 1
perimeter = 2 w + 2 L </= 380 so w + L </= 190 and L >/= 110
January 4, 2016

U.S. History
I read it wrong. God with Reed !
January 4, 2016

U.S. History
I agree
January 4, 2016

English
Absolutely c !
January 4, 2016

Algebra 1
You are welcome. note this time it does not include the line itself whereas the earlier one was greater than AND equal to
January 4, 2016

Algebra 1
No constant y is a HORIZONTAL line everything below y = -2
January 4, 2016

Algebra 1
everything on and to the right of the vertical line x = 3
January 4, 2016

U.S. History
I would have picked C
January 4, 2016

U.S. History
I would have picked Sam Adams. Most of us think of Lexington and Concord as the opening volley of the war.
January 4, 2016

Math
say each eats one pound per day :) I have 21 * 24 = 504 pounds now I have 21 + 15 = 36 people or 36 lb/day 504 pounds/36 lbs/day = 14 days
January 4, 2016

math
n = d + 43 (d - 17) = .5 n or d = .5 n + 17 so n = .5 n + 17 + 43 .5 n = 60 n = 120 d = n-43 = 77 that is at the start but he spent 17 dimes so 120 + 60 = 180 coins left
January 4, 2016

Algebra 1
You are welcome.
January 4, 2016

Algebra 1
2 (4x+3) - 8 x = 3 8 x + 6 - 8 x = 3 0 x = - 3 oh my, division by zero try y = 4x + 3 and y = 4x + 3/2 ah, we have a problem here two parallel lines, same slope but different y axis intercepts They never touch each other, ever/ NO SOLUTION
January 4, 2016

Algebra 1
one
January 4, 2016

Algebra 1
x = +5 y + 3 x = -5 y + 3 -----------------add 2 x = 6 x = 3 then y = 0 they cross at (3,0)
January 4, 2016

Science -- Check my Answer Plz (again)
Now we have a heat capacity question mass of 50 mL = 50 grams change in temp = 10 degrees C specific heat capacity of water = 1 cal/gram deg C so heat in = 1 cal/g C * 50 g * 10 C = 500 Calories = 5 * 10^2 Calories
January 4, 2016

Algebra 1
LOL - You are welcome.
January 4, 2016

Algebra 1
19/2 = 9.5 !!!!
January 4, 2016

Algebra 1
( -2 , -19/2 ) ?
January 4, 2016

Algebra 1
Now you try. I did the last one.
January 4, 2016

Algebra 1
-x+2=3x-1 4x = 3 x = .75 then y = 1.25 so ( .75 , 1.25 )
January 4, 2016

Science -- Check my Answer Plz
you had typed 540*10^4 it should be 5.40 * 10^4
January 4, 2016

Science -- Check my Answer Plz
You will need 540 calories per gram water is 1 mL or 1 cm^3 per gram so I get 540 * 100 csl which is 5.40 * 10^4 cal I hope B is a typo and should be 5.40*10^4
January 4, 2016

Science -- Explaination on Heat Capacity?
You are welcome, good luck.
January 4, 2016

Science -- Explaination on Heat Capacity?
Oh my, you question is not about heat capacity but about the latent heat of fusion of water. to melt one gram of ice at 0 deg C requires 224 Joules or 79.8 Calories so to melt 10 grams requires 2240 Joules or 798 calories (so pick 800) specific heat capacity is when there is a...
January 4, 2016

Math
number of spots for players over the season = 42 * 9 = 378 378/14 = 27 games for each player
January 4, 2016

math
of course now that you mention it, adding a number to itself is kind of like multiplying it by two if it were six instead of five 6+6 = 12 2*6 = 12
January 4, 2016

math
2 n = n + 5 ? n = 5
January 4, 2016

Geometry (again)
You could maybe see if a^2+a^2 = c^2 or in the trapezoid if the two diagonals are equal
January 4, 2016

Algebra
T(t)= 12 + 3 (t-7)
January 4, 2016

Rational Numbers
Well done !
January 4, 2016

Rational Numbers
You are welcome.
January 4, 2016

Rational Numbers
A. Sometimes 22/7 is used for pi HOWEVER it is only an approximation. There are no two whole numbers you can divide and get pi. pi is therefore IRRATIONAL B no way, irrational C no way, irrational D 4/3 YES, finally
January 4, 2016

U.S. History
.... and now ?
January 4, 2016

Math
let u = sin x so du/dx = cos x y = cos^-1 (u) dy/dx = - [1/(1-u^2)^.5 ] du/dx = -[ 1/cos x] cos x = -1 we agree
January 4, 2016

math
540/27 = 20
January 4, 2016

physics
bullet mass + wood mass = 2.107 kg potential energy if up 0.4 meter: I assume this is along the circumference so .4 = theta * 2 = theta = .2 radians = 11.5 degrees distance up from bottom = 2 (1-cos theta) = .0803 meters so energy at top = m g h =2.107*9.81*.0803 = 1.66 Joules...
January 4, 2016

Math Complicated
You are welcome.
January 4, 2016

Math Complicated
Yes, you have it :)
January 4, 2016

Math
(24/48)(x^4/x^2) (y^2/y) (1/2) x^2 y
January 4, 2016

physics
vertical problem: v = Vi - 9.81 t v = 0 at the top t = Vi/9.81 at the top which is 100 meters h = Vi t - 4.9 t^2 100 = Vi^2/9.81 - .5*9.81 (Vi^2/9.81^2) 100 = .5Vi^2/9.81 Vi = 44.3 m/s T = angle up from horizontal sin T = 44.3/50 T = 62.4 degrees t = 2 * Vi/9.81 = 2*44.3/9.81...
January 4, 2016

US History
nope: http://www.dummies.com/how-to/content/what-is-the-presidents-cabinet.html
January 4, 2016

Science
I agree with YRN on all others
January 4, 2016

Science
5 is C
January 4, 2016

Science
Al is 27 g/mol so we have 3 * (13.5/27) * 6 *10^23 electrons lost
January 4, 2016

Science
M = metal we have MCl2 1 mol chlorine and 1/2 mol of metal 35.5 g chlorine in a mol 111 - 35.5 = 75.5 g of M so M is 75.5 * 2 = 151 g/mol maybe Europium
January 4, 2016

Physic
sorry, no it is ok well, for a plane wave d^2y/dx^2 must be (1/v^2)d^2y/dt^2 if y = x^2 + v^2 t^2 dy/dx = 2x d^2y/dx^2 = 2 dy/dt = 2 v^2 t d^2y/dt^2 = 2 v^2 2 = (1/v^2) 2 v^2
January 4, 2016

Physic
well, for a plane wave d^2y/dx^2 must be (1/v^2)d^2y/dt^2 if y = x^2 + v^2 t^2 dy/dx = 2x d^2y/dx^2 = 2 dy/dt = 2 v^2 t d^2y/dt^2 = 2 v^2 so it is not and you should have written x^2 + (1/v^2) t^2
January 4, 2016

Science
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/restmp.html
January 4, 2016

physics
west momentum = 1500 * 90 north momentum = 1400 * 72 final west momentum = 2900 Vwest final north momentum = 2900 Vnorth final = initial speed = sqrt(Vwest^2 + Vnorth^2) tan angle west of north = Vwest/Vnorth
January 4, 2016

Math
upstream speed = u - c downstream speed = u + c d = (u-c)(3.5) = (u+c)(2.1) but c = 3 so (u-3)(3.5)=(u+3)(2.1) 3.5 u - 10.5 = 2.1 u + 6.3 1.4 u = 16.8
January 4, 2016

Another Calculus help plz
I do not know if you mean tan (x/2) or (1/2) tan x Parentheses are important. I will just do y = tan x = sin x / cos x perhaps that will get you going. dy/dx = (cos^2 x + sin^2 x)/cos^2 x = 1/cos^2 x
January 4, 2016

Calculus help plz
cos^2 mx dx ? = mx/2 + sin(2mx) / 2m
January 4, 2016

Math
22.05 = 1960 (r/4) 1960 r = 88.20 r = .045 so 4.5 %
January 4, 2016

Math
3 * .04 * 820
January 3, 2016

Math
.75 * 52
January 3, 2016

Science (Mrs.sue please help)
Yes.
January 3, 2016

Need the picture
Without the picture there is not much hope of help.
January 3, 2016

Algebra
slope of zero means constant y (4,9) and (3,9) and calling the second coordinate x is presumably done to confuse the student.
January 3, 2016

Physic - ah got it !
http://www.thefreedictionary.com/physic
January 3, 2016

Physic
By the way is a physic something you take for a stomach ache?
January 3, 2016

Physic
work = force in the direction of motion * distance normal force down = weight - tension component up = m g - F sin 23 friction force = .33(mg-F sin 23) drag force = F cos 23 no accelration so friction force = drag force F cos 23 = .33 (mg-F sin 23) solve for F we want the ...
January 3, 2016

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