Wednesday
December 7, 2016

Posts by Damon

Total # Posts: 28,388

sorry
I did not notice the second part. L * w = 68200 2 L + 2 w = 1460 L = 730 - w (730-w)w = 68200 730 w - w^2 = 68200 w^2 -730 w + 68200 = 0 w = [ 730 +/- sqrt(532900-272800)]/2 w = [730 +/-510 ]/2 w = 110 or 620 L = 620 and w = 110
August 14, 2016

idea
L * w = 68200 however unless you know more about the ratio of L to w, there are an infinite number of solutions.
August 14, 2016

Math
7 quarters/8 dimes is not 8 dimes / 7 quarters
August 13, 2016

Help- Precalc
since sin α < 0 α is in quadrant 3 or 4 since tan α is +, that puts α in quadrant 3 -5,-7, sqrt 74 triangle since csc β > 0, β is in quadrant 1 or 2 since cot β is -, β is in quadrant 2 -3, 5, sqrt 34 triangle now sin (a-b) = sin a...
August 13, 2016

Math
a-b = 4 a^2-b^2 = 80 (a-b)(a+b) = 80 4 (a+b) = 80 a+b = 20 a-b = 4 ------------ add 2 a = 24 a = 12 so b = 8
August 13, 2016

physics
v = g t = 9.81 t at t = 9, v = 9.81 * 9 at t = 10, v = 9.81 * 10 average speed during tenth second 4.9 (19) distance during tenth = 4.9 * 19 * 1
August 13, 2016

Use parentheses
I do not know what are your numerators and denominators.
August 12, 2016

car rental agency
a is 60 + .22 x b is 56 + .26 x when does 60 + .22 x = 56 + .26 x .04 x = 4 x = 100 miles
August 12, 2016

Algebra 1
http://www.dictionary.com/browse/irrational--number
August 12, 2016

Better
2 sqrt 5 = sqrt 20 sqrt 5 = 2.236067977 IRRATIONAL
August 12, 2016

propability
By the way I am assuming that death is a failure ;)
August 12, 2016

propability
4/20 = 2/10 = 0.2 Ik versta wel.
August 12, 2016

physics
Mass does not change with g, weight does. You seem to be using feet/pounds units so g = 32 ft/s^2 approx on earth Mass = 150 /32 slugs g other = 32 * (34/15)
August 11, 2016

Science -Please answer
I think your control is no cleanser.
August 11, 2016

Trigonometry
tan (angle) = 20/12 so angle = tsn^-1 (20/12)
August 11, 2016

Science 1 question help plz thank you
Basing a conclusion on too little data is not an ethical error but a scientific planning and execution error. Google ethical definition eg: http://www.dictionary.com/browse/ethics
August 10, 2016

Pre algebra
well, look at it here and there x always left of y on number line x=-2 y=-1 -> x-y = -1 and |x-y|=1 x= 8 y= 10 -> x-y = -2 and |x-y|=2 in fact if x < y then x-y is ALWAYS - and |x-y| = y-x so I conclude y-x
August 10, 2016

check my spanish 3
Do I have to write a sentence with it or can I just state the verb?? Sorry, it's a stupid question but I just want to make sure I'm correct
August 9, 2016

check my spanish 3
escriba la forma del verbo indicado en el tiempo indicado yo/ tener/ futuro My answer is tendré
August 9, 2016

math
163.50 ( 6/11 ) = 88.18
August 9, 2016

math
3*7*11 = 231 and 2+3+1 = 6 so that does it, 231 ====================== three times that would have a sum of 18 so 3*231 = 693
August 9, 2016

Maths
a = 5 p/7 p = a + 92 so a = 5(a+92)/7 7 a = 5 a + 460 2 a = 460 a = 230
August 9, 2016

messed up physics
acceleration is the rate of change of velocity A = dV/dt The ratio is not meaningful. Did you get this language from a book?
August 9, 2016

Math
60/12 = 5
August 8, 2016

sign error
d^2 -10 d - 25 = 0 d = [ 10 +/-sqrt (100+100) ]/2 = 5 +/- .5 sqrt (200) = 5 +/- 5 sqrt 2 use + so 5 sqrt 2 left of zero = - 7.07
August 8, 2016

Physics
You show a charge at x = 5 but you ask for the E field there It is UNDEFINED. 1/r^2 as r--->0 is infinite r is simply the distance between the charge and the location where you compute E to the left of 5, the E field due to + q at 5 is left (repels) however the E field due ...
August 8, 2016

Math
You are welcome.
August 8, 2016

Math
s = 2 m s = b/5 but m = 23 so s = 2 m = 46 but b = 5s so b = 230
August 8, 2016

Chem
You are welcome ;)
August 8, 2016

Chem
LOL, hint - it is below freezing point of water with no antifreeze
August 8, 2016

Math
x + 2x + 3x = 480 6 x = 480 x = 80 2x = 160 3x = 240
August 8, 2016

Math
You are welcome :)
August 8, 2016

Math
one tile area = .1*.1 = .01 m^2 total area = 2.4 m^2 2.4 /.01 = 240/1 = 240 tiles
August 8, 2016

algebra
y = (3/4) x - 3 so slope = 3/4 y = (3/4) x + b 3 = (3/4)8 + b b = -3 so y = (3/4) x - 3 or 3/4 = (y-3)/(x-8)
August 8, 2016

Science
You are welcome :)
August 8, 2016

Science
I too would have picked A and C.
August 8, 2016

Math
yes
August 8, 2016

Math
k = y/x = 350/40 dollars/hour
August 8, 2016

Science
Some would argue about C. However I agree that C is fundamentally science because the planting dates and predicted climate in the almanac are based on observed data over the years. Of course the seed catalog also tells you when to plant what in which zone without pretending to...
August 8, 2016

Calc
slope = f' = 6 x - 5 x^4 at x = 1 slope = m = 6(1)-5(1)^4 so m = 1 y = 1 x + b to get b 7 = 1(1) + b b = 6 so y = x + 6
August 8, 2016

Applied Stats
You are making a mountain out of a mole hill I think: .24 * 20 is the number that have been told 20 - .24*20 = number that have not been told
August 8, 2016

physics
weight = force = 25*9.8 N force = k x 25 * 9.8 = 700 x
August 8, 2016

statistics
This is really linear programming, not statistics. p = 4 a + 6 b That is the objective function we wish to maximize 1 a + 3 b </=240 wood constraint 3 a + 4 b </=360 plastic constraint 2 a + 1 b </=180 steel constraint graph those three constraint lines with a on x ...
August 8, 2016

math
78 cos (180-165)
August 7, 2016

physics
Can you not break 2H2O molecules into 2H2 and O2 ? So what is wrong with B ?
August 7, 2016

physics
a compound is fixed proportion, like two H and one O an atom is fixed proportion, 100% HOWEVER a mixture is not necessarily a fixed proportion. Could be sand, water and cannon balls mixed in any proportions A
August 7, 2016

physics
A mixture is joined in a fixed proportion?
August 7, 2016

algebra 2
You're** Happy now??
August 6, 2016

algebra 2
Thanks so much!!! Your the MVP
August 6, 2016

algebra 2
Create a set of data with 5 numbers that satisfy all of the following conditions: 1. the range is 10 2. the mean is 20 3. the median is 22
August 6, 2016

Math
2 x + 2(x-6) = 32 4 x - 12 = 32 4 x = 44 x = 11
August 4, 2016

Physics
a = change in speed/ time = 16/4 = 4 m/s^2 average speed = (8 + 24)/2 = 16 m/s so distance = 16 * 4 = 64 meters
August 4, 2016

Math
slope = 5 = (y - -1) /(x - -2) so 5 = (y+1)/(x+2) so y+1 = 5(x+2)
August 4, 2016

biomechanics
Three times as far.
August 3, 2016

I'm stuck- please help
when x = 0, cos -pi = -1 when x = pi/4, cos -pi/2 = 0 when x = pi/2 , cos 0 = 1 when x = 3 pi/4, cos pi/2 = 0 etc
August 3, 2016

someone please help me. - Precalc
ahhhh , but that is the same as y = sin(x) :)
August 3, 2016

physics 1
unless it is a self propelled ball the acceleration is 1 g down, about 9.81 m/s^2
August 3, 2016

algebra
2/5 * 5/8 = 1/4
August 3, 2016

Calculus1
no in quadrant one you get a positive result in quadrant two you get a positive result in quadrant three the result is negative, change it to + so 1+1+ |-1| = 3
August 3, 2016

pre cal Huh????
Trig identity: sin(u+v)= sin u cos v + cos u sin v
August 3, 2016

biomechanics
power * time = work so if time the same, look at difference in work done which is change in potential energy m g h 60 g .6 = 36 g Joules 90 g .45 = 40.5 g Joules
August 3, 2016

biomechanics
ke = (1/2) m v^2 pe = m g h where h is height above one meter (1/2) m v^2 = m (9.8) h v^2 = 2 (9.8) h h = 64/19.6 total height = 64/19.6 + 1
August 3, 2016

Biomechanics
(1/2) m v^2 = m g h v^2 = 2 g h
August 3, 2016

biomechanics
to convert km/hr to m/s either use Google or head. for example 7 km/hr(1 hr/3600 seconds)(1000 m/km) = 7 /3.6
August 2, 2016

math
there are 12 + 5 + 3 = 20 marbles in the bag. We do an experiment to find out how many are blue call the probability of a blue one x She picks blue 4 out of twenty times, which is 20/100 = 0.20 Her fingers must reject blue because one would expect 12/20 = 0.60
August 2, 2016

physics
average force = change of momentum/time = 3 * 25 / .1 Newtons
August 2, 2016

Chemistry
sample of silver metal is suspected to be contaminated with zinc. A 0.2365 g portion of this metal is dissolved in nitric acid and the silver ions precipitated with excess aqueous NaCl. After filtering and drying, the mass of the precipitate is found to be 0.2865 g. What was ...
August 2, 2016

Math
A = (1/2) b h h = b - 2 so 60 = (1/2) b(b-2) 120 = b^2 - 2 b b^2 - 2 b - 120 = 0 (b-12)(b+10) = 0 b = 12 h = 10
August 2, 2016

math again ?
10, been there, done that
August 2, 2016

math
Yes, that is the desired answer. However it is not really nearly that easy. Assume you have 3438 in your back pocket. If you take that loan you will pay a total of 3960 so the easy answer is you save 522 ======================= Now the hard part. that is 261 per year interest ...
August 2, 2016

science
.5 mol in 1/5 of a liter is 2.5 mol in a liter ======================= 1 mol / 1 liter 10 mol in 10 liters
August 2, 2016

maths
b = 4 g + 3 That is all I can say without the other half of the problem.
August 2, 2016

Chemistry
for Kelvin add 273 for F F = (212-32)C/100 + 32 = (9/5)C + 32
August 2, 2016

Physics
If your textbook gave you a problem written that sloppily, best find another book.
August 2, 2016

Physics
Work is force times the distance moved in the direction of the force. 35 * 42 Joules Is the work done by that force. You do not say if there are also other forces like gravity for example or if the force is in the direction of motion here.
August 2, 2016

Physics
I assume 100 meters is the height of the hill, not the distance down the slope. loss of potential energy = 80 * 9.81 * 100 normal force on slope = 80 * 9.81 *cos 70 friction force = 0.110 * normal force = 0.110 * 80 * 9,81 * cos 70 distance moved down slope = 100 /sin 70 so ...
August 2, 2016

Physics
F = k x 54 = k * 0.20 k = 54 * 5
August 2, 2016

Algebra 2
My answer: The area of the circle enclosed by x^2 + y^2 = 100 is the times larger than the area of the circle enclosed by x^2 + y^2 = 25.
August 1, 2016

Algebra 2
How much larger is the area of the circle enclosed by x^2 + y^2 = 100 than the area of the circle enclosed by x^2 + y^2 = 25?
August 1, 2016

Physics
stored potential energy = (1/2)k x^2 = (1/2)(400)(.04)^2
August 1, 2016

pre cal
hypotenuse = sqrt (3+9)= sqrt 12 = 2 sqrt 3 sin = sqrt 3 / hypotenuse cos = 3/hypotenuse etc
August 1, 2016

physics
h = Vi t - 4.9 t^2 so 42 = 2 Vi -4.9*4 solve for Vi then when is h = 0 again? 0 = Vi t - 4.9 t^2 0 = t (Vi - 4.9 t) t = 0 at start of course then it comes back to ground at t = Vi/4.9
August 1, 2016

Chemistry
If the pH of a 0.46 M aqueous solution of a weak base is 9.2, estimate the Kb of the base:
August 1, 2016

maths
p = r - 15 p+5 = (1/2)(r+5) 2 p +10 = r+5 2 p = r - 5 2 p = 2 r - 30 ----------------- 0 = -r +25 r = 25
August 1, 2016

Calculus
let y = x+3 then dy =dx (y-3) ln y dy = y ln y dy - 3 ln y dy = y ln y dy - 3/y let u = ln y then dv = y dy so v = (1/2)y^2 and du = dy/y so (1/2)y^2 ln y -(1/2)ydy -3/y (1/2)y^2 ln y - (1/4)y^2 - 3/y but remember y = x + 3 :)
July 31, 2016

Typos
P(A or B) = P(A) + P(B) - P(both A and B) P(A or B) = P(A U B) P intersection which is both at once and your upside down U is P(A)P(B) = .5*.3 = .15 so P(A U B) = .5 + .3 - .15 = .65
July 31, 2016

Math
P(A or B) but not both = P(A) + P(B) - P(both A and B) P(A or B) = P(A U B) P intersection which is both at once and your upside down U is P(A)P(B) = .5*.3 = .15 so P(A U B) = .5 + .3 - .5 = .65
July 31, 2016

mathfinish your question please
sum of what equal to what?
July 31, 2016

math
How bad could it get? 1+2+3+4 = 10 so at least five slips to be sure to get a sum greater than ten.
July 31, 2016

Math
one way 2 + 1 + 2 + 1 - 4 = 2
July 31, 2016

Math
http://www.bankrate.com/partners/sem/mortgage-calculator-rates.aspx?s_kwcid=AL!1325!3!114614083448!e!!g!!mortgage+calculator+with+taxes&ef_id=V54ISwAAAH4QPBQk%3a20160731141643%3as
July 31, 2016

English
You are correct. Chang is not change.
July 30, 2016

math
Hard to say from your description. But if something came down from height h and had no loss of energy due to friction or whatever then the kinetic energy is equal to the potential energy at the start (1/2) m v^2 = m g h or v = sqrt (2 g h) = sqrt ( 64 h) in the ancient foot ...
July 30, 2016

Calculus AB
....but the last one I did was fun :)
July 30, 2016

Calculus AB
a better be 0 if it is the same for + and - x c better be 4 if 2^2 - c = 0 and (-2)^2 - c = 0 so far y = b/(x^2-4) if x = -1 y = b/-3 = 3 so I guesss b = -9
July 30, 2016

Calculus AB
tan slope angle 1 = m1 tan slope angle 2 = m2 so angle 1 = tan^-1 m1 angle 2 = tan^-1 m2 so theta = angle 2 - angle 1 = tan^-1 m2 - tan^-1 m1 tan theta = tan (a - b) where a =tan^-1 m2 and b =tan^-1 m1 so tan theta = (tan a-tan b)/(1+tan a tan b) [trig identity] = (m2 -m1)/(1...
July 30, 2016

Calculus AB
(x-r)(x-s) = x^2 + b x + c x^2 - rx - sx + rs = x^2 + b x + c
July 30, 2016

Maths
1/3 = 2/6 1/2 = 3/6 so 1/6 on wafers so 2/3/1
July 30, 2016

please use one name
ah come on
July 30, 2016

Calculus AB
5, 12, 13 right triangle here so sec = 1/cos = 13/5 then 3, 4 , 5 tan = 1/cot = 4/3 so sin = 4/5 so 13/5 - 4/5 = 9/5
July 30, 2016

  1. Pages:
  2. <<Prev
  3. 10
  4. 11
  5. 12
  6. 13
  7. 14
  8. 15
  9. 16
  10. 17
  11. 18
  12. 19
  13. 20
  14. 21
  15. 22
  16. 23
  17. 24
  18. Next>>