Posts by ANONYMOUS

Total # Posts: 109,610

physics
236

maths
If tan A=a/b prove that 2sec theta + 1/ cos theta+2=Õ a2+b2/b

Math
11/2-{(11/2X1/3)+(11/2X1/4)}=2 7/24

Physics
The relative density of an alloy is 6.5.a.find the mass of a solid cube of side 20cm.b.what volume of the alloy has a mass of 13kg

Math
In Virginia, the Grand Caverns is approximately 35 kilometers from the Frontier Culture Museum. You make a drawing of the two locations with a scale of 6 inches representing 35 kilometers. How far apart do you draw the Grand Caverns and Frontier Culture Museum?

Maathhh
30 students surveyed, 30% said their favorite juice was grape. How do I find out how many students that is?

Algebra
(i am new to this subject of algebra) Use the figure to answer the following questions: ( a triangle with the bottom right corner of it labeled L with (1, 1) x y coordinates. Left corner of the triangle is labeled M at the (-3, 1) coordinates. the top of the triangle is ...

Math - Please help ASAP!
The second one is B

math
s,e,l,e,c,t,e,d are in the bag allen picked a letter.What is the fraction,decimal,and percentage of not selecting a consonant

chemistry
how to calculate the oxidation state for 'cr' in K2CRO4 ?

Chemistry
molar mass of CO2=44g/mol We have 4.4g n= 4.4÷44=0.1mol CO2=0.1×6.022×10^23molecules =6.022×10^22 molecules 1 molecule of CO2 contains 2atoms of Oxygen 6.022×10^22 molecules would contain 6.022×10^22×2=1.204×10^23 that is 1.2&...

Chemistry
Agreed. We can't just spoon feed you.

Algebra
Thank you so much!!

Algebra
Solve the following equation. Show all steps. x/x-2+x-1/x+1=-1

math
Draw a shape that exhibits rotational symmetry of order 3 and 1 line of symmetry.

Math
Find the probability that theven pointer will stop on an odd number or a number less than 7

Math
(125/360) pi D^2/4

Math
well (4/5) x = -2 x + 3 4 x = -10 x + 15 14 x = 15 x = 15/14 then y = (4/5)(15/14) = 12/14 = 6/7 (15/14 , 6/7 )

Math
The first bee’s path to the hive follows the line: y = 4/5 x. The second bee’s path follows the line: y = -2x + 3.

Math
Two bees have found a food source. The first bee’s path to the hive follows the line . The second bee’s path follows the line . Their paths cross at the hive. Use substitution to solve the problem. What are the coordinates of the hive?

Algebra
1. The length of a rectangle is twice its width. The perimeter of the rectangle is 24 inches. Write a system of equations in 2 variables. Use substitution to solve the problem. A. Equation 1: Equation 2: _________________________________ B. What is the area of the rectangle?

Physics
x = .05 sin [2 pi (.5)t] = .05 sin 3.14159 t v = .05 pi cos pi t a = -.05 pi^2 sin pi t max a = .05 pi^2 max v = .05 pi 10 mm = 1 cm = .01 m x = .01 = .05 sin 3.14 t sin 3.14 t = .20 3.14 t = 11.5 degrees = .201 radians t = .0641 seconds v = .05 pi cos 11.5 degrees a = -.05 pi...

Physics
x = .08 sin 2 pi (100)t = .08 sin 628 t v = dx/dt = .08(628) cos 628 t a = d^2x/dt^2 = -.08(628)^2 sin 628 t so max a = .08(628^2) max f = m a = 8 * max a

math
Find the sum of 8x cube y +2xy cube -18and -12x cube y +7xy cube and subtract it from the sum of 19x cube y -17xy cube +12and -21+5xy cube .? PLEASE SOLVE IT ?????

MATH
If you roll a number cube 25 times, about how many times do you expect to roll a number greater than 3?

Finance Question - Formulas
Instead of spending the $50 a month you receive, you decided to invest it in your money market account at your bank. Assuming you will earn an average of 5% each year and inflation is forecasted to 2.5% a year, how much have you effectively earned after ten years? (Hint: must ...

Math
Slide is 7.5 m long maximum slope is 32 degrees how high can top of slide be?

Algebra 2
The seniors at Travis High School have three purchase options for their yearbook. Option 1: They can purchase a copy of the yearbook and a one-page ad for $35. Option 2: They can purchase a copy of the yearbook and a one-half page ad for $25. Option 3: They can purchase a copy...

Consider the following equation: CO + 2 H 2 → CH 3
.

chemiste-ry
Consider the following equation: CO + 2 H 2 → CH 3 OH △H rxn = -128 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 8.08 g H 2 .

chemistry
How to prove that sodium hydroxide is a base with the help of an equation for the reaction

math
find the largest number that will divide 220,313,and 716 leaving remainder 3 in each case?

math
in this question we will ad the both year population like this : 22,41,289 + 48,000 ---------- 22,89,289 ---------- so,the increased population in village is 22,89,289.

math
The population of a distrust was 22,41,289 two years ago if the population of the village increased by 48000 in two years what is the present population.? Solve and

Algebra
Student tickets to the Homecoming game cost $5 each. General admission tickets cost $8 each. So far, 150 tickets have been sold. $900 has been collected. A. Write a system of equations for this model in standard form. 5S = Student tickets: 100 sold 8G = General Admissions: 50 ...

Algebra
Are (50) and (100) the correct coordinates? just double checking.

Algebra
Student tickets to the Homecoming game cost $5 each. General admission tickets cost $8 each. So far, 150 tickets have been sold. $900 has been collected. A. Write a system of equations for this model in standard form. 8G = General Admissions: 50 sold 5S = Student tickets: 100 ...

fractions
Michael owns 3/8 of the shares in a company. he sold 1/3 of his shares to his friend. if there are a total of 7600 shares in the company, how many shares does michael still have left ?

geometry
A candle manufacturer sells cylindrical candles in sets of three. Each candle in the set is a different size. The smallest candle has a radius of 0.5 inches and a height of 3 inches. The other two candles are scaled versions of the smallest, with scale factors of 2 and 3. How ...

Technology
Calculate the force required to move a small pistons that has an area of 2m2,if the force of a large piston is 20n with an as area of 4m2.Hint use a formulae :a frorce of small piston divided by an area of small piston equal to force of large pistone divided by area of large ...

Math
Student tickets to the Homecoming game cost $5 each. General admission tickets cost $8 each. So far, 150 tickets have been sold. $900 has been collected. A. Write a system of equations for this model in standard form. B. Graph the system. ( let each square represents 20 units...

Math
Sin theta sin(90- theta) cos theta cos(90-theta)=0

Algebra 1b
Which of the following is false about |x| < n? Select one: a. x < n and x > –n b. It is a disjunction c. The graph is an intersection d. The graph does not include n

math
find the ratio x:y (hint: same as find x/y): 2 1/2 x = 4 1/2 y

Math
If a > b and c < 0, then: Select one: a. ac > bc b. a/c>b/c c. ac < bc d. None of the above I have no idea how to answer this questions because there aren't any numbers!

Trig
read C) again. She only took the + root. She should have taken both as you said.

Trig
Well, as I said, A) works

Trig
x = 1/2 t + 3 is 1/2 t = x - 3 which is t = 2(x-3) which is A) and y = 2 t - 1 is 2 t = y+1 which is t = (y+1)/2 which is not there unless D is a typo

Math
if n+1 = 5 then n = 4

Calculus
200 in + x direction F at angle 20 above x axis R = 340 at angle T above x axis 340 cos T =200 + F cos 20 340 sin T = F sin 20 solve for F and T F is magnitude we want The angle we want is 20 - T

Physics
x0 = 0 x1 = (1/2) 2 (100) v1 = 2*10 = 20 x2 = x1 + 20 (30) = x1 + 600 v2 = x1 = 20 time retarding = t 0 = v2 - 4 t so t = v2/4 then x3 = x2+v2(v2/4)-(1/2)(4)(v2^2/16)

Math
If ajay spent 1/9 of his pocket money of Rs.450 on chocolates and 2/5 on fruits. How much money is left with him?

Algebra
The members of a team can run 500 meters between 57 seconds and 73 seconds. A. Write an absolute value inequality describing the times for the runners. 57<t<73 B. Graph the inequality on a number line. Would like help on step B if possible and step A check.

Algebra 1b
The members of a team can run 500 meters between 57 seconds and 73 seconds. A. Write an absolute value inequality describing the times for the runners.

GPA
If I have a class that is over 100% right now and I have another class that is a 92%, would they balance out when calculating my GPA or not? (The rest of my classes are A's)

where we split
Where we split. You did nothing wrong, just made it harder :) ?ds = ?k/h dh s = k [ln h + ln C ] you said that was k ln (C h) which is correct but I said k ln h + c which is also correct, but my way made it easy

Math (Calc) (Differential Equations)
s = k ln h + c 25 = k ln 3 + c 10 = k ln 9 + c -----------------subtract 15 = k ln(3/9) = k ln (1/3) etc

Algebra 2
cos T(2 sin T + sqrt 3) = 0 well right off pi/2 and 3 pi/2 so what about sin T = -sqrt3/2 well then it is a 30,60, 90 triangle and we are talking about the 60 degree corner sin is - in quadrants 3 and 4 so pi + pi/3 = 4 pi/3 and 2 pi - pi/3 = 5 pi/3

Calculus
symmetric around x = 0 so do it from x = 0 to x = 3, then double. crash into each other at x = 2 so do it from x = 0 to x = 2 then from x = 2 to x = 3 add, then double integral (8-2x^2)dx from 0 to 2 8x - (2/3)x^3 at 2 - at 0 16 -16/3 integral from 2 to 3 (2 x^2 - 8) dx (2/3)x...

Calculus
Find the area of the region between the curves y=8?x^2 y=x^2 x=?3 and x=3 I made a slight correction

Calculus
Find the area of the region between the curves y=8?x2 y=x2 x=?3 and x=3

Science
The closer together magnetic field lines are, the The magnetic force A closer B farther C stronger D weaker

history
I bet you know #8 without even reading the chapter :)

no way
I already took the course and do not need practice. The idea is you try and we try to help if you get stuck.

math help
Just like compound interest :)

ah, unlikely
If anyone here knows what is on your test they are not telling.

maths
32 (t + 2)= d 52 t = d so 32 t + 64 = 52 t 20 t = 64 t = 3.2 hours and 12 minutes ========================== check 32 * 5.2 = 166.4 52 * 3.2 = 166.4 good

math
y = m x + b 295 = m * 7 + b 155 = m * 3 + b ------------------subtract 140 = 4 m m = 35 so y = 35 x + b now put a point in 155 = 35(3) + b b = 155 - 105 b = 50 so y = 35 x + 50

math
For 1 i meant B not D sorry

math
1. which ratio form a proportion? 4/9, 12/25 3/7, 18/42 5/11, 20/45 5/8, 15/25 2. which ratio forms a proportion with 18/30? 20/35 50/90 36/48 60/100 ~MY ANSWERS~ 1. D 2. I don't know this one can someone help me please. I have tried for over 30 minutes on this.

Physics
humm, is it sliding or rolling? If rolling then some of that potential energy goes into kinetic at the bottom Ke = (1/2) m v^2 + (1/2) I omega^2 I = (2/5)mr^2 for solid ball so Ke = (1/2)mv^2 + (1/2)(2/5)mr^2 omega^2 but v = r omega so Ke = (7/10)mv^2 so 9.8*.45 = .7 v^2 by ...

math
A cyclist took 3 1/3 hours to cover 46 km. For the first 30 km, he cycled at 15 km/h. Find his speed for the last part of the journey.

science
Which sequence shows the correct order of Earth’s geologic time intervals from oldest to youngest?

Math
Don bats in 9 cricket matches. In the tenth match, he makes 9 runs and his average decreases by two. How many runs has he made in all?

Algebra
right triangle with hypotenuse = diagonal x^2 + (x-7)^2 = (x+7)^2 x^2 + x^2 - 14 x + 49 = x^2 +14 x + 49 x^2 -28 x = 0 = x(x-28) x = 0 or x = 28 so 28 by 21 ----------------------- try that length = diagonal^2 = 28^2 + 21^2 = 784 + 411 = 1225 so diagonal = sqrt(1225) = 35 yes...

Math
correct

Math Help
yes

PHYSICS incomplete question
incomplete need ratio of mass of Venus/mass of earth If the radius is the same then the g is proportional to the mass of the planet

mathis this a right triangle?
If DF is the hypotenuse then DE = EF = 16/sqrt 2 = 16 sqrt 2 / 2 = 8 sqrt 2 If FE is the hypotenuse then FD=DE = 16

math
well, it is a little tricky 6 x^2 + 5 x = 4 to get something on your list you subtract 4 from both sides. I get x = 1/2 or x = 4/3

Physics (Mirror Rays)
The focal point is halfway between the surface of the mirror and the center of the circle.

Math
Two automobiles leave an intersection at the same time. One of them travels west and the other travels south. When the vehicle going south has traveled 24 miles, the distance between the cars was four miles more than 3 times the distance traveled by the vehicle traveling west...

math
Factorise: 4x^2-9y^2+2x-3y

college algebra
The current in a simple electrical circuit is inversely proportional to the resistance. If the current is 80 amps when the resistance is 30 ohms, find the current when the resistance is 12 ohms

college algebra
A. 3units B. 0units

college algebra
23. In biology, the function defined by g(x)=5x/2+x gives the growth rate of a population for x units of available food. (Source: Smith, J. Maynard, Models in Ecology, Cambridge University Press.) (a) What amount of food (in appropriate units) would produce a growth rate of 3 ...

college algebra
Biologists collected a sample of 600 fish from West Okoboji Lake on May 1 and tagged each of them. When they returned on June 1, a new sample of 800 fish was collected and 10 of these had been previously tagged. Use this experiment to determine the approximate fish population ...

Physics 11
I assume that you are talking about one rigid body. Work input is basically the force times the displacement in the direction of the force. You can have more than one force acting on a body but if so, combine (add) them and only use the component in the direction of motion. I ...

Chemistry
correction to first line Fe3O4 not Fe ---------------------- You need 4 mols of CO for every 1 mol of Fe3O4 4 * .03820 = .153 so we need .153 mols of CO BUT we only have .120 mols of CO so the CO limits or controls the reaction so we actually use .120/4 = .0300 mols of Fe3O4 ...

Chemistry
You need 4 mols of CO for every 1 mol of Fe 4 * .03820 = .153 so we need .153 mols of CO BUT we only have .120 mols of CO so the CO limits or controls the reaction so we actually use .120/4 = .0300 mols of Fe3O4 that means we have .0300 *3 mols of Fe = .0900 mols Fe on each ...

world geography
shipbreakers wreck old ships in order to

math
39-35.10 = x 100(x/35.10) = answer

Math
You are welcome.

Math
I guess you want with respect to x 3 x^2 dx/dx + 2 y dy/dx = 27x dy/dx + 27 y dx/dx but dx/dx = 1 as you know so 3 x^2 - 27 y = (27 x - 2 y )dy/dx so dy/dx = (3x^2-27y)/(27x-2y)

math
.75 * .75 * 256 .75*.75 = .5625 = 56.25 % .5625 * 256 = 144 or 3/4 * 3/4 = 9/16 and 9/16* 256 = 9*16 = 144

math
twice = 100 % increase three times = 200 % increase etc ten times = 900% increase or 1000 % of original is 900% increase:)

physics
c * (T-24)(500) = c *(84-T)(750)

physical science
Google meniscus surface tension

physical science
Why does liquid substance have the same meniscus shape

Fractions
There are animals on the farm half are pigs one fifth are sheep what fraction are cows

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