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October 21, 2014

Posts by anon


Total # Posts: 1,384

trigomometry
Thank you !
February 20, 2011

trigomometry
I don't think its right . can you correct me please . A.log sin A = 9.91655 - 10 sinA = 0.82537 A = 55.626° = 55° 34' 35" B.log cot A = 0.11975 cot(A) = 1.317498... A = 37.199 degs A = 37º 11' 56"
February 20, 2011

trigomometry
I don't think its right . can you correct me please . A.log sin A = 9.91655 - 10 sinA = 0.82537 A = 55.626° = 55° 34' 35" B.log cot A = 0.11975 cot(A) = 1.317498... A = 37.199 degs A = 37º 11' 56"
February 20, 2011

sciencce
Mrs. Scheib was riding her bike and leaves home and rides due east for a distance of 45 km. she returns home on the same bike path. if the entire bike path takes 4 hrs what is her average speed? Is it 11.25?
February 17, 2011

list some harmful effects of plagiarism.
please ineed answer for this question by his or her own word list some harmful effects of plagiarism. In other words, explain what is morally wrong with plagiarism. How does plagiarism harm the perpetrator? thank you
February 16, 2011

program planning
write a single paragraph which answers this question, “Who is responsible for program planning, the academic advisor or the student? Explain why.”
February 15, 2011

trigonometry
can you correct the rest for me please? Express each as a function of theta: a. sin (270deg + theta)= cos theta b. cos (pi + theta)= -cos theta c. tan (810 + theta)= ????? d. sin (theta - 180)= -sin theta
February 11, 2011

gr.10 math
could you please show me the steps to solve this equation?I looked at the answer in the back of our textbook but i keep getting the wrong answer. 5(2y+1)-(5y-2) answer=5y+7. thanks so much!
February 11, 2011

Math
R(p) = p - 0.08p - 1200
February 9, 2011

Math
Add the two equations to form one equation.
February 9, 2011

Algebra
Area = pi * r^2 diameter = 2r, r = d/2 d = 10x, r = 10x/2 = 5x A = pi * (5x)^2 A = 3.14 (25x^2) A = 78.5 x^2
February 8, 2011

pre cal
If you sketch this out you will have a right triangle, I will call ABC. A is the vertex = angle of depression AC (side b) = base = 1400 feet BC (side a) = leg = 1100 feet AB (side c) = hypotenuse = distance to landing site To find angle A (angle of depression) tan A = a/b = ...
February 8, 2011

Algebra 1
Solution, x <= 10/3 and y < 5 - x/2 x > 10/3 and y < -2(x - 5) Google for an online graph calculator. You will be able to input the equations and the program will show you a graph.
February 8, 2011

geometry
The ratio of the sides of the 1st triangle is, 3 : 4 : 6 The second triangle is x : x : 15 6 : 15 = 3 : x 6/15 = 3/x cross multiply 6x = 45 x = 7.5
February 8, 2011

math
8/8 - 3/8 = 5/8 To find the percent, 5 divided by 8 = 0.625 * 100 = 62.5%
February 8, 2011

Math
Maybe if you would repost (again) and this time proofread for nonsense symbols that only you know what they mean. What is "x1,x2¡¦¡¦¡¦¡¦¡¦x11.(Thus,-2 is labeled x1,82 is labeled x2 and so on.) find ¢&...
February 8, 2011

Jiskha
Why would you need to do this? Were you looking for test answers? I don't mean to infer you were cheating, but I cannot think of any other reason you would need to remove questions asked.
February 8, 2011

Chemistry
Describe how to prepare 5.00 liters of a 5.00 % (w/w) NaCl solution, which has a density of 1.06 g/mL, from pure solid sodium chloride. I have no idea how to find the starting measurements please help!
February 6, 2011

physics
a framed picture of weight 15N is hung on a wall, using a piece of string. The ends of the string are tied to two points, 0.60 m apart on the same horizontal level, on the back of the picture.Find the tension in the string if the string is 1.0m long
February 6, 2011

trigonometry
can you correct the rest for me please? Express each as a function of theta: a. sin (270deg + theta)= cos theta b. cos (pi + theta)= -cos theta c. tan (810 + theta)= ????? d. sin (theta - 180)= -sin theta
February 5, 2011

trigonometry
Express as a function : c.tan (810degrees + theta ) I'm confused between two answers . 1. that it would be tan 90 deg (which is undefined) 2. it would be cot theta ?? can you tell me what i should do to get the right answer.
February 5, 2011

Physics
BUMP!
February 5, 2011

math
Well, 'biscet' is not a word and FGH could be just about anything. Your question is not clear.
February 2, 2011

math
Buy him a drink?
February 2, 2011

Calculus
f(x)= x^2 + bx + 1 on [-1,1] First, integrate | = integration symbol |x^2 + bx + 1 = 1/3 x^3 + 1/2 bx^2 + x + C Evaluate from -1 to 1 1/3 x^3 + 1/2 bx^2 + x + C 1/3 (1)^3 + 1/2 b(1)^2 + 1 - (1/3 (-1)^3 + 1/2 b(-1)^2 - 1 1/3 + 1/2 b + 1 - (-1/3 + 1/2 b - 1) 1/2 b + 4/3 - (1/2 b...
February 1, 2011

algabra
D = RT (Distance = Rate x Time) T = D/R T = 960/70 T = ? T = 960/75 T = ?
February 1, 2011

Math
4x^4 - 6x^2 + 2 2(2x^4 - 3x^2 + 1) 2(2x^2 - 1)(x^2 - 1) 2(2x^2 - 1)(x - 1)(x + 1)
February 1, 2011

Spanish-7th grade
What are you doing Monday at 10 o'clock? I Study. I write. I listen to the teacher. I watch television.
February 1, 2011

Finance
If simple interest, I = PRT I = 25000(0.07)(4) I = ? 25000 + ? (interest) = value in 4 yrs
February 1, 2011

Algebra
(4x^6)(-3x^9)(6x^7) 4 x -3 x 6 = -72 x^6 * x^9 * x^7 = x^22 (add the exponents) (4x^6)(-3x^9)(6x^7) = -72x^22
February 1, 2011

english- to kill a mocking bird
in the book to kill a mocking bird by harper lee, what did Atticus learn, i have been searching everywhere and cannot find the answer, PLEASE HELP:(
January 30, 2011

English
YOU'RE A LIAR!!!! THOSE ARE NOT "88.2" ANSWERS!!!!! THAT WAS A 29.3 ANSWERS!!!!!! U SUCK
January 28, 2011

trigonometry plz explain.
Which way is done correctly and why ?? Express the following in degrees,minutes, and seconds: (1)4 --> (180/pi)*4 = 229.18312 229.18312 = 229 + (0.18312*60) = 229 degrees + 10.9872' = 229 deg 10' + (0.9872*60)" = 229 deg 10' + 59.2" or (2)4*180/pi = ...
January 26, 2011

trigonometry??
Did I do this right???? Express the following in degrees,minutes, and seconds: a.4 --> (180/pi)*4 = 229.18312 b.0.23 --> (180/pi)*0.23 = 13.17803 c.pi(3.14159)/6 --> (180/pi)*(pi*3.14156/6) = 94.24778 d.3*pi/2 --> (180/pi)*(3pi/2) = 270 e.-1.4 --> (180/pi)*-1.4...
January 26, 2011

Trigonometry
Express the following in radians: f.1025degrees. --> (pi/180)*1025 = -185pi/36 Is that correct or theirs another way to do it ??
January 24, 2011

PHYSICS
A harmonic wave on a string moves along the x-axis according to: î(x,t) = 5.0 (cm) sin[ (2.5m-1) x - (63s-1) t ] At x = 1.0 m when t = 2.2 s the speed of the oscillations on the string is closest to ... 25.2 m/s 4.55 m/s 3.15 m/s 2.27 m/s 1.67 m/s
January 23, 2011

physics
At a distance of 30 m the noise from the engine of an jet has an intensity level of 130 dB. At this level, you will be in pain and your ears will hurt. That's why this intensity is know as the "pain threshold". How far do you have to be from a jet (total distance...
January 23, 2011

Trigonometry
Express the following in radians: f.1025degrees. --> (pi/180)*1025 = -185pi/36 Is that correct or theirs another way to do it ??
January 23, 2011

physical
A harmonic wave on a string moves along the x-axis according to: î(x,t) = 5.0 (cm) sin[ (2.5m-1) x - (63s-1) t ] At x = 1.0 m when t = 2.2 s the speed of the oscillations on the string is closest to ... 25.2 m/s 4.55 m/s 3.15 m/s 2.27 m/s 1.67 m/s
January 23, 2011

physical
At a distance of 30 m the noise from the engine of an jet has an intensity level of 130 dB. At this level, you will be in pain and your ears will hurt. That's why this intensity is know as the "pain threshold". How far do you have to be from a jet (total distance...
January 23, 2011

Trigonometry
showed me below where ??
January 23, 2011

Trigonometry
Express the following in radians: a.135degrees. --> (pi/180)*135 = how can i end up with a fraction answer?? b.-15degrees. --> (pi/180)* -15 = same here what are the steps to do next to get a fraction answer.
January 23, 2011

ALGEBRA
What exactly is "help properly"? He/she explained how to do this problem. Do you expect the problem to be done for you? "You need to attempt these questions yourself if you expect to learn anything." This is a true statement.
January 23, 2011

MATH
Do you mean, x^4 - x^2 - 6 This was answered the first time you posted it. I pasted the answer here for you. (x^2 - 3)(x^2 + 2)
January 23, 2011

geometry
una piramide cuadrangular?
January 23, 2011

beginning algebra
I got 1 +or- the sqrt 90/2
January 22, 2011

beginning algebra
Solve the equation (u-1)^2=2u^2-3u-29 for u .
January 22, 2011

College Algebra
Just not good at division
January 22, 2011

College Algebra
Divide. (9x^3-10+19+6x^4)/(-2x^2+3x-3) Write your answer in the form Q(x)+ R(x)/ -2x^2+3x-3, where Q(x) is the quotient and R(x) is the remainder.
January 22, 2011

beginning algebra
Solve the equation (u-1)^2=2u^2-3u-29 for u .
January 22, 2011

beginning algebra
Find the least common multiple of the two expressions 15v^4w^8 and 9vw^5x^4
January 22, 2011

beginning algebra
Solve for y. Write answer in simpliest form. 2+7/y=3/5
January 22, 2011

math
P = 2L + 2W W = 25 L = 50 P = 2(50) + 2(25) P = ? solve
January 20, 2011

math
16.8/72 = .23 please, where did you get 4.286?
January 20, 2011

Trig
Hi everyone, I have a WS due tomorrow, and would really appreciate some help. You are taking a ride on a Ferris wheel that is 100 feet in diameter and has a bottom point that is 10 feet above the ground. Suppose that the wheel rotates four times every minute and from your ...
January 20, 2011

Chemistry
If water I'd added to magnesium nitride, ammonia gas is produced when the mixture is heated Mg3N2 (s) + 3H2O (l) ----> 3MgO) (s) + 2NH) (g) *Only the numbers at the beginning aren't subscripts* If 10.3 g of magnesium nitride is treated with water, what volume of ...
January 19, 2011

Chemistry
Determine the pressure in a 125-L tank containing 56.2 kg of oxygen gas at 25 °C. So, PV=nRT I convert 25 °C to 298.15 K Do I have to convert anything else? What else do I do?
January 19, 2011

Chemistry Lab
1.312E03
January 17, 2011

Combinatorics
In how many ways can 8 students be assigned to 2 groups if each group must have at least 3 students?
January 17, 2011

Ochem
For the reaction between chloroacetic acid and 4-chlorophenolate to synthesize 4-chlorophenoxyacetic acid, why is this reaction a sn2 reaction?
January 15, 2011

trigonometry
can you explain to me in details please of how these type of questions can be answered without using a calculator to find the direct answer. Find the following functions correct to five decimal places: a. sin 22degrees 43' b. cos 44degrees 56' C. sin 79degrees 23'...
January 13, 2011

trigonometry
sinA= 3/5 and C=17 Finding a and b
January 12, 2011

trigonometry
sinA= 3/5 and C=17 Finding a and b Their two triangles and i have to find the ratio i just can’t seem to set up the problem right but i gave an example of one of the practice exercise that dealt with finding only (a) so i got confused with finding a and b in that question...
January 12, 2011

trigonometry.
b= sqrt 17^2 - 10.2^2 = 13.6 ??
January 10, 2011

trigonometry.
sinA= 3/5 and C=17 Finding a and b would this work as an answer ..? sinA = opp/hyp = a/c = 3/5 = 3*3.4/5*3.4 = 10.2/17 a = 10.2 Applying Pythagoream Theorem a^2 + b^2 = c^2
January 10, 2011

trigonometry.
In a right triangle sinA= 3/5 and C=17. Find a and b. Be sure to draw a right triangle and letter it properly. how can i solve the math in this problem. i know i would have to use the Pythagoream Theorem but i dont know how to set the problem up first.
January 10, 2011

Physics
Does the frequency of light change as it enters a different substance? I know that the speed changes. The question might seem easy, but I have contradicting notes, so I'm confused.
January 6, 2011

Trigonometry
``(please show the steps to how the problems were solved) Using exact values, find the value of: A.12sin 30 degree - 6 tan 45 degree + sec 45 degrees/ 52 B.Sin2A + tan3A/2 - cos A + sec(a+ 15), when A=30degrees
January 6, 2011

Trigonometry
I need to show my work so i cant use a calculater . did i show it correctly?
January 1, 2011

Trigonometry
Please review and tell me if i did something wrong. Find the following functions correct to five decimal places: a. sin 22degrees 43' b. cos 44degrees 56' c. sin 49degrees 17' d. tan 11degrees 37' e. sin 79degrees 23'30' f. cot 19degrees 0' 25'...
January 1, 2011

re post Trigonometry
hopefully this will post more clearly! 12sin 30 degree - 6 tan 45 degree + sec 45 degrees/ 52 = 12¡¤1/2 -6¡¤ 1 + ¡Ì2/52 = ¡Ì2/52 Sin2A + tan3A/2 - cos A + sec(a+ 15)= ¡Ì3/2 + 1 - ¡Ì3/2 + ¡&...
January 1, 2011

Trigonometry
Using exact values, find the value of: a. 12 sin 30 degrees ¨C 6 tan 45degrees + sec 45degrees / 52 12-1/2-6*(1) + ¡Ì2/52=¡Ì2/52 12-1/2-6+¡Ì2/52 what should i do next?? b. Sin2A + tan3A/2 - cos A + sec(a+ 15) Sin2A + tan3A/2 - cos A...
January 1, 2011

Calculus
As a baseball player runs from second to third base, he is going 20 feet per second. What is the rate of change from the runner to home when he is halfway to third base? (The sides of a baseball field are 90 feet)
December 31, 2010

Calculus
At a certain point in time, a cubical crystal has edges 5 mm in length, and these edges are growing at a rate of 2 mm per hour. How fast is the volume increasing?
December 31, 2010

Trigonometry
tan45+sin60=(sin30+cos30) 1+ã3/2=(1/2+ã3/2) How do i work it from her?
December 31, 2010

trigonometry
tan^2 30 sqrt(3)/3 To the second power how can i do that ??
December 30, 2010

trigonometry
tan60=2 tan30/1-tan^2 30 sqrt(3)=I'm confused of that 2 but i guess it means to multiply. again.. sqrt(3)= (2) sqrt(3)/3 / 1- sqrt(3)/2 ^2 now i dont know how to square tan . if u can show me in details i would appreciate it. this is just a practice problem and i want to ...
December 30, 2010

French
Hi, I'm wondering if any of you could lead me to the mark scheme for the IGCSE French Reading and Directed Writing Paper 23 May/June 2010? Any help would be appreciated. Thank you.
December 21, 2010

Math
By solving the equation x/8 + x/10 = 90. Sorry for the late response.
December 17, 2010

Math
In jar 1, 1/8 of the marbles are white. In jar 2, 1/10 of the marbles are white. Since the jars are filled with an equal amount of marbles, take this value to be x. Therefore, x/8 + x/10 should equal to 90, the total number of white marbles. From this, we get x = 400 marbles ...
December 17, 2010

Physics
It's from a textbook, the answer I'm supposed to get is 5250 Joules..
December 17, 2010

Physics
A bungee jumper of mass 60 kg jumps from a bridge tied to an elastic rope which becomes taut after he falls 10 m. Consider the jumper when he has fallen another 10 m and is travelling at 15 m/s. Work out how much energy is stored in the rope. Take g=10 m/s^2 and ignore air ...
December 17, 2010

Physics
At t = 0, a 785 g mass at rest on the end of a horizontal spring (k = 125 N/m) is struck by a hammer, which gives the mass an initial speed of 2.70 m/s. (a) Determine the period of the motion. T= .4979201367s Determine the frequency of the motion. f= 2.008354 Hz (b) Determine ...
December 7, 2010

Math
There are 4 black marbles and 5 red marbles in a bag. If you reach in and randomly select 2 marbles, what is the probability that both are red? Explain your reasoning.
December 3, 2010

6th grade
12% is the same thing as .12 So .12*(number of sixth graders) = 24 number of sixth graders = 24/.12 = 200
December 1, 2010

chem
what is the name of ONO and what is its charge
December 1, 2010

chemistry
complete and balance the following equation: CoCl*6H2O+ NH4Cl+ NH3+ H2O ---> [Co(NH3)5Cl]Cl2+ H2O
December 1, 2010

chem
you used a pencil to mark the chromatography paper since the carbon in the "lead" pencil does not dissolve in the solute. why does carbon not dissolve? what type of pen (ink) will also not produce a chromatogram when water is used as the solovent? explain using ...
November 29, 2010

chem
the total pressure of n2o4 and no2 IS 1.38 atm. if kp is 6.75(25 C) calculate partial pressure of NO2 in the mixture. 2NO2<---> n2o4
November 28, 2010

C++
I have no idea how to construct this program. Any help is appreciated. Thank you. In a population, the birth rate is the percentage increase of the population due to births and the death rate is the percentage decrease of the population due to deaths. Write a program that ...
November 17, 2010

physics
An undersea research chamber is spherical with an external diameter of 3.70 m. The mass of the chamber, when occupied, is 26000 kg. It is anchored to the sea bottom by a cable. What is the tension in the cable?
November 16, 2010

Chemistry
lawls
November 14, 2010

Chemistry
tony is stupid
November 14, 2010

Earth CRYience
Assume a parcel of air on the surface with a temperature of 29 degrees Celsius with a relative humidity of 50%. If the parcel rises at what altitude should clouds form?
November 12, 2010

math
no typo. I tried the quadratic equation and got -.986 and 1.24. Does this mean there are no real roots (an option in the question). Also, for the question 4x^2-12x+9, is the real root (2x-3)?
November 12, 2010

math
What are the real roots of the quadratic function 4x^2-x+5?
November 12, 2010

4th grade
Let n= a number n-5
November 11, 2010

3rd grade
Eleven and five. 11+5=16 11-5=6
November 11, 2010

algebra
Distribute. 40x-16=84 Add 16 to both sides. 40x=100 Divide both sides by 40. x=2.5
November 11, 2010

English
Thank you.
November 11, 2010

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