Questions Asked on
November 3, 2006

  1. math

    2x + 3y = 78 How do i solve for x and y? 2x=78 78/2=39 so x=39 3y=78 78/3=26 so y=26 Can't be, because 2(39)+ 3(26) does not equl 78 You need TWO equations when you have TWO variables, such as x and y. It can't be done with one equation. BUT, you say, what

    asked by mike
  2. physics

    The length of a simple pendulum is 0.82 m and the mass of the particle (the "bob") at the end of the cable is 0.69 kg. The pendulum is pulled away from its equilibrium position by an angle of 6.7 ° and released from rest. Assume that friction can be

    asked by jennifer
  3. equation complex number

    z^4 + 81 = 0 (solve) change it to polar, then take the root. z^4= 81@180 z= 3@180/4 + n90 where n=0, 1, 2, 3 check: z= 3@180/4 + 3*90=3@315 z^4=81@(4*315)=81@1260= 91@180=-81 you can check it at the other roots also. this is what i did: z^4 = - 81 z (81

    asked by kevin
  4. Algebra

    Is it possible to find the slope of a line if the equation has two ys? Find slope of the line whose equation is 8y = 7 - 2y Solve for y and you'll have a horizontal line. Combine the y terms. 8y+2y=7 10y=7 y=7/10 The general equation for a straight line is

    asked by Samantha
  5. MVT

    How do I explain this problem? A trucker handed in a ticket at a toll booth showing that in 2 h he had covered 159 mi on a toll road with speed limit 65 mph. The trucked was cited for speeding, why? I know it is mean value theorem, but how? His average

    asked by Jen
  6. English

    I really need help with this Essay question and I haven't got a clue. It is to do with Fitzgeralds "The Great Gatsby" please answer before Monday 6th November. Thankyou. here is the question: Through analysis of patterning, examine Fitzgerald's use of

    asked by Matthew
  7. Free Fall

    Thanks for the help with my previous problems. The acceleration to gravity on the moon is 1.6m/sec^2. If a rock is dropped into a crevasse, how fast it will be going just before it hits bottom 30 sec later? How far below the point of release is the bottom

    asked by Jen
  8. complex numbers!

    -2-2i in polar form = 2.8 cis 2.35?? -3+4i polar form = 5 cis 2.2??? 1 - sqaureroot(3i) polar form = 2 cis 1.04?? What is cis? never mind I have the right answers. polar form z = r (cos O + i sin O ) is also written in an abbreviated form z = r cis O cos +

    asked by kevin
  9. math

    the inverse cosine of negative 0.947 Put it in your calculator... The sequence of keys in my old ten dollar calculator is .947 +- 2nd COS Other calculators have different keys strokes. If you want to be neat, type this into a google search window:

    asked by latoya
  10. How to sketch graph of...

    a differentiable function y =f(x) that has the given properties. 1. local minimum at (1,1), and local maximum at (3,3) 2. local minima at (1,1) and (3,3) 3. local maxima at (1,1) and (3,3) I don't remember how to do this. Thank you.

    asked by Jen

    this is a table with some questions and i don't know how to solve it -------------table-------------------- (1)real domestic output (GDP=DI) in billions $200 $250 $300 $350 $400 $450 $500 $550 (2)aggregate expenditures private closed economy billions $240

    asked by britney
  12. History

    Revenue for transportation was to come from these under Henry Clay's American System Very good detailed answer at this site:

    asked by Amanda
  13. History

    Who was the Democratic leader,"Cross of Gold" speech? William Jennings Bryan

    asked by Amanda
  14. Algebra

    Please check for me. 7p - 7/p divided by 10p-10/5p^2 = 7p^2 6x - 6/x * 6x^2/8x-8 = 9x/2 I'm not sure how to answer this one. x/2 divided by 9/x + 5 I think it's x(x + 5) / 18 Without grouping symbols () it is impossible to understand the problems. The ^

    asked by Samantha
  15. Intermediate Algebra

    Am I going in the right track? 8x -1/x + 5x - 3/2x = 16x^2 - 2x/2x^2 + 5x^2 - 3x/2x^2 16x^2 - 2x + 5x^2 - 3x/2x^2 =21x^2 - 5/2x^2 Find the LCD 6/7z- 28, 8/x^2 -4x = 7x(x-4) Simplify 3x^2 - 2x/15x-10 = x/5 Let's start by looking at your first problem: 8x

    asked by Richard
  16. to bobpursley

    My classmates friends want me to post their questions as well.Thats why there are multiple names is there a problem. Yes. You are posting duplicate or even triplicate questions. That is silly. If we have answered one, the answers to the others follow.

    asked by minemine
  17. Math

    Hers is another one: 3 people requires 3 weeks and 2 days to do a job. How long would it take for 4 people to do the same job? (Each week is 6 days) Convert time to days only to avoid confusion. Assuming the relation between people and time is linear,

    asked by mike
  18. English!_+ check please!

    Rank the following sentences from most formal to least formal by writing the appropriate number in the blank beside each sentence: 1 = most formal; 3 = least formal. /3 ___2__I was pumped. I mean, we had scored the best seats for the show. Awesome ___1__In

    asked by benji!
  19. History Essay

    I Need help with this essay The Purpose of this essay is to analyze the relationship between wealthy nations and supporting of the arts. -Think about the early years if the renaissance,and the spanish of the ducth today -include examples of artistic

    asked by Bryan
  20. English

    Can anyone check my essay? I could send the rubric for scoring. Thanks You have to include the essay itself, so we can check it. Respond to this post with the essay. Thanks for asking. Whats your question..?

    asked by Antonio
  21. Eth

    My assingment states to view the comparison of the UNited States-Centric. Which I have a compare and contrast sheet I need to fill in about how an average american perceptions about muslim and arab american and christian american groups. Now I've done the

    asked by Angy2020
  22. economics plz help

    this is a table with some questions and i don't know how to solve it -------------table-------------------- (1)real domestic output (GDP=DI) in billions $200 $250 $300 $350 $400 $450 $500 $550 (2)aggregate expenditures private closed economy billions $240

    asked by britney
  23. Research Paper

    Hi all. It seems that I've run into a problem while starting to write a research paper for my drugs and behavior class. You see we were given an outline to follow and we had to choose any drug related topic. So I'm doing mine on cocaine and the problem I'm

    asked by Andre
  24. congruence

    What is the difference between the statements segmentAB is congruent to segmentCD & AB is congruent to CD Thanks No difference. Congruence is congruence. A=B B=A

    asked by Jen
  25. Interesting Geometry Probem

    I am bulding a sculpture out of rock and need help figuring out how much rock to buy... Here are the figures... 1 ton of 1.5" rock covers 107 sq. ft. My sculpture will be comprised of 24 layers of rock 2" thick. Each layer will be aproximatly 3ft. by 3ft.

    asked by Elizabeth
  26. Arithmetic Operations

    Find a set of 4 distinct positive integers a,b,c,d such that the smallest positive integer that can not be represented by such expressions involving a,b,c,d (instead of 1,2,3,4) is greater than 22.You can use digits exactly once. You are allowed to reuse

    asked by Parashar
  27. physics

    In a room that is 2.13 m high, a spring (unstrained length = 0.30 m) hangs from the ceiling. A board whose length is 1.58 m is attached to the free end of the spring. The board hangs straight down, so that its 1.58-m length is perpendicular to the floor.

    asked by laura
  28. economics

    please please please please help me this is due tomorrow!!! this is a table with some questions and i don't know how to solve it (1)real domestic output (GDP=DI) in billions $200 $250 $300 $350 $400 $450 $500 $550 (2)aggregate expenditures private closed

    asked by britney
  29. title making

    whatis a good inline skating title for something that is aimed at promoting in line skating and incourage skaters to practice safe skating thanks so much this is due tomorrow and i have dinner soon, plz hurry and i thank you soooo much! Skate Safe and

    asked by Cass
  30. Stats

    Dee's store monthly sales for April, May, June are three independent random variables with means and variances as follow: April: Mean: $9500 Variance: $1250 May: Mean: $7400 Variance: $1425 June: Mean: $8600 Variance: $1610 a) find the mean and standard

    asked by Dee
  31. economics please help

    this is a table with some questions and i don't know how to solve it (1)real domestic output (GDP=DI) in billions $200 $250 $300 $350 $400 $450 $500 $550 (2)aggregate expenditures private closed economy billions $240 $280 $320 $360 $400 $440 $480 $520

    asked by britney
  32. Research Paper

    I have to write a research paper but I don't know what to pick as a topic. I want something simple. Last time i chose Napoleon and it was overwhealming. Can anyone suggest a simple topic that is easy to research. Preferable historical. Mozart disco John

    asked by Jonathan
  33. English+ check!

    Exercise: Add an appropriate /transition word/ or phrase to connect the following pairs of sentences. 1. Our first destination is Ottawa /there/; we plan to visit Montreal and Quebec City. 2. Standing on the rocky ledge, we had an aerial view of the

    asked by benji!
  34. Chemistry

    True or False or Sometimes true Removing one electron from an atom results in the formation of a postive ion with a 1+Charfe. Of course it is true. Normally atoms have a balance of electrons and protons.

    asked by Bryan
  35. history

    What banking reform finally gave the nation a flexible money supply? This site will also answer this question.

    asked by Amanda
  36. math - probability

    Imagine a LONG bike with a total of 4 wheels - 2 in the front and 2 in the back. For the bike to work at all, at least 1 front wheel and 1 back wheel must be operational. All 4 tires are the same and each, individually, has probability 'p' of failing. What

    asked by andrew
  37. math

    I have a math test today.What shoud do?

    asked by kesha
  38. More related rates.

    Heyy, its me again. So last night I asked a related rate question, and I think I still don't get it. I tried it a few differnt ways and I think I'm just missing something...I don't think a speed of a rocket can be 0.018km/hr:S. So heres what happened: A

    asked by Tracy
  39. Another graph

    How do I make a graph of f'(-1) = f'(1) = 0, f'(x) > 0 on (-1,1), f'(x) < 0 for x < -1, f'(x) > 0 for x >1 Thanks. if the derivative is postive on -1 to 1, you have a curve that shope upward as x increases. If the derivative is zero at -1, and 1, thekn at

    asked by Jen
  40. complex numbers

    -3 + 4i in polar form in pi the magnitude is 5 from pyth theorm. Now the angle. Using i the positive real as the reference axis, the angle from it is PI/2 + arctan4/3

    asked by kevin
  41. allgebra

    how is linear,quadratic,rational,or exponental realated to arithmetic series 1/4s=4

    asked by tonya
  42. science

    I have a test today. what shoud do? Study.

    asked by kesha
  43. science

    I have a test today .

    asked by kesha