Tuesday
September 2, 2014

Posts by sophie


Total # Posts: 374

sience
ok thanks!! you have been a great help [x]
June 22, 2009

sience
i need to make a p.h indicator in sience but i cant think of any other than.. tea bags, some sort of juice and.. red cabbage anyone got any sujestions?
June 22, 2009

Spanish
Come up with a question to these answers. Si, de Alicante. No, es médica. No, es argentina.
June 18, 2009

Math
Write the standard form of the equation of the parabola whose directrix is x=-1 and whose focus is at (5,-2)? a) (y+2)^2 = 12(x+2) b) y-2 = 12(x+2) c) x+2 = 1/12(y+2)^2 d) x-2 = 1/12(y+2)^2 I get A and D? confused!
June 17, 2009

Math
oohh yes i did! thanks!!
June 16, 2009

Math
oh, so it is C?
June 16, 2009

Math
For 4x^2 - 4xy + y^2 = 4 find θ, the angle of rotation about the origin, to the nearest degree? a) 27° b) 63° c) 333° d) 307° I got A, is this right?
June 16, 2009

Algebra
inead help on math homwork
June 14, 2009

Math
oh! thanks for your time!
June 9, 2009

Math
tan^-1(1/2)=x=.463648 tan^-1(2/3)=y.588003 x+y+pi/2 = -z=2.62245 z=-2.62245 cos (z) = -.868243 and tan a= -1/2 tan b= -2/3 tan (a+b)=(tan a +tan b)/(1-tan a.tan b) so tan (a+b)= -7/4 sec^2 x-tan^2 x=1 so sec (a+b)=√(1+49/16) =√(65/16) (a+b)=1/sec (a+b) so cos(a+b) ...
June 9, 2009

Math
ohh okay thanks!
June 9, 2009

Math
If α and β are two angles in Quadrant II such that tan α= -1/2 and tan β = -2/3, find cos(α+β) Work: cos(α+β) = [ 1 - (tan α)(tan β) ] / [ 1 + (tan α)(tan β)] cos(α+β) = [ 1 - (-1/2)(-2/3) ] / [ 1 + (-1/2)(-...
June 9, 2009

Math
thanks for checking (;
June 8, 2009

Math
Find the measure of the reference angle for 400 degrees. I did the work and got 40 degrees, is this right?
June 8, 2009

Math
Thanks for checking!
June 8, 2009

Math
Find sin(sin^-1 1/4) is the answer 1/4?
June 8, 2009

Math
never mind, i was right
June 3, 2009

Math
Write an equation in slope-intercept form of the line whose parametric equations are: x = (1/2)t +2/3 and y = t - 3/4. a) y = 2x - 7/12 b) y = 2x + 7/12 c) y = -2x - 7/12 d) y = -2x - 25/12 I think it is D.....?
June 3, 2009

Math
thanks for checking!!
June 2, 2009

Math
Find the ordered pair that represents the vector from A(-4.3,-0.9) to B(-2.8,0.2)? Then find the magnitude of AB. A. (1.5,1.1); 3.46 B. (-7.1, -0.7); 7.13 C. (1.5, 1.1); 1.86 D.(-7.1, -1.1); 7.18 I got C, is this right?
June 2, 2009

Math
okay thanks
June 2, 2009

Math
Find an equation of the line that bisects the obtuse angles formed by the lines with equations 3x-y=1 and x+y=-2. a. (3√2 +√10)x-(√10 + √2)y-2√10+√2=0 b. (3√2 - √10)x+(√10 - √2)y+2√10+√2=0 c. (3√2...
June 2, 2009

Math
oh okay, thought so thanks!
June 1, 2009

Math
Find the distance between P(-4,3) and the line with equation: 2x - 5y = -7 a. (14√29)/29 b. 0 c. (-16√29)/29 d. (16√29)/29 I got C but would it be positive, like D?
June 1, 2009

English
well you could do a little of both by saying a catchy sentence and then stating more of the facts
June 1, 2009

Math
no those are the options for sure :/
June 1, 2009

Math
it's B?
June 1, 2009

Math
Use a sum or difference identity to find the exact value of sin225° a. (-√2 - √6)/4 b. (√6 - √2)/4 c. (√6 + √2)/4 d. (√2 - √6)/4 is it A?
June 1, 2009

math
Yes thanks! I got sqrt10/2 also!!
June 1, 2009

math
I did the theorem and got 16/√10 ?
June 1, 2009

math
Find the distance between the lines with equations 3x-y=9 and y=3x-4 a. 5/4 b. (5√10)/2 c. √10/2 d. (13√10)/2 not too sure on this one!
June 1, 2009

Math
so would 2. be C as well?
May 29, 2009

Math
The paddle wheel of a boat measures 16 feet in diameter and is revolving at a rate of 20 rpm. The maximum depth of the paddle wheel under water is 1 foot. Suppose a point is located at the lowest point of the wheel at t=0. 1. Write a cosine function with phase shift 0 for ...
May 29, 2009

Math
thanks
May 29, 2009

Math
Write an equation of the tangent function with period (3π)/8, phase shift -π/5, and vertical shift -2. a. y=tan((8x)/3 - (8π)/15) -2 b. y=tan((8x)/3 + (8π)/15) -2 c. y=tan((16x)/3 +(3π)/80) -2 d. y=tan((8x)/3 - (3π)/40) -2 I think it is A... or B?
May 29, 2009

math
In triangle ABC, a=7.8, b=4.2, c=3.9. Find B a. 15.1° b. 148.7° c. 78.9° d. 16.2 ° It is D, right?
May 28, 2009

spelling
thank you
May 28, 2009

spelling
If i wanted to shorten the word phenomenal to phenoms would it be es or just s on the end.
May 28, 2009

advanced math
thought so, thanks!
May 28, 2009

advanced math
If 0°<= 360°, solve the equation, sec x=-2 a. 150° and 210 ° b. 210° and 330° c. 120° and 240° d. 240° and 300° I believe it is C. am i right?
May 28, 2009

math (matrices)
Find the values of x and y for which: [2y+5] [x-1] [y - 2] = [ 3x ] is true. a. (-1, -1) b. (-2, -4) c. (5, 1) d. (-1, 4) I got B...?
May 24, 2009

French1
Complete with the correct form of the partitive. -Benoit va au marche. Il achete _____ fromage. would it be du? -Il achete _____ poires. would it be des?
May 8, 2009

French 1
oui, merci
May 8, 2009

French 1
Rewrite the following sentences in the negative. -Je suis de Paris. Would it be: Je ne suis pas Paris. -Michelle est americaine. Would it be: Michelle n'est pas americaine. Am I wrong??
May 8, 2009

grammar
You said either "the" or "those" would be correct. Why was I be marked wrong for using "the"?
May 7, 2009

grammar
I was marked incorrect for using the. Any ideas?
May 7, 2009

grammar
Do you change them to the or those? I think it is the, but I am not sure. Later we cooked them fish and talked about the excitement of the day.
May 7, 2009

grammar
thank you.
May 7, 2009

grammar
Then I would go with no change. Correct? Thanks.
May 7, 2009

french
______ l'equipe ja ponaise a tres bien joue a. Tout b. Toute c. Tous d. Toutes I think it is A? On annonce le de'part de _____ vol? Le vol a destination de Paris? a. quel b. quelle c. quels d. quelles is it A?
May 5, 2009

french
merci beaucoup!
May 5, 2009

french
Le train part _____. a. da la voie b. du chariot c. la queue I think it is A?
May 5, 2009

Calculus
The problem I have is a summation from 1 to infinity for (-1)^n/n. I have to find a partial sum that is in 0.001 of the infinite sum, my teacher says the fourth partial sum approximates the infinite sum, which is -7/12. I think to get within 0.001 of the infinite sum, do I ...
May 5, 2009

french
merci!
May 4, 2009

french
Le train arrive et les voyageurs montent _____. a. sur la voie b. en voiture c. devant la gare d. au kiosque I know it isn't d.... not sure though! Le train arrive Presque toujours _____. a. en retard b. a l'heure c. le matin d. l'horaire is it b....?
May 4, 2009

French
Je descends _____. a. au kiosque b despuis 45 minutes c. au prochain arrete d. a la boucherie I think it is c or b?
May 4, 2009

french
merci!
May 4, 2009

french
Choose the correct noun that matches the stated verb below. Choisir a. la fin b. un choix c. la vue d. un atterrissage Is it b? Voir a. la fin b. un choix c. la vue d. une croyance Is it C?
May 4, 2009

French 1
yes very true! Merci!
May 4, 2009

French 1
So 1 is A and 2 is A?
May 4, 2009

French 1
C'est _____ voie? a. quelle b. quelles c. quel d. quele Is it C? Tu voyages avec ______ compagnie aerienne? a. quelle b. quelles c. quel d. quele Is it B?
May 4, 2009

French 1
merci beaucoup!
May 3, 2009

French 1
Ils regardent les vetements pour hommes dans ______ de la boutique. a. la caisse b. les soldes c. al vitrine d. au rayon I am thinking that it is c or b??? La Martinique est dans la mer _____ Antilles. a. de b. des c. de l' d. de la is it b?
May 3, 2009

Chemistry
I need help with the following problem: A fabric remnant from a burial site had a 14 C:12 C ratio of 0.838 of the original value. How old is the fabric? (half-life of 14 C = 5370 years)
April 29, 2009

English- Medieval Period
this was the only one I missed. Thanks for all help though! It was C. loyalty.
April 23, 2009

English- Medieval Period
it should say all of the above for D So it is D then?
April 23, 2009

English- Medieval Period
This refers to Sir Gawain and the Green Knight Gawain's actions at the castle reveal that the knight's moral code values: a. strength b. courage c. loyalty d. NONE OF THE ABOVE I put B, I am not sure though.... ???
April 23, 2009

Allied Health Graded Project
APA is most common to use. For help you can go to easybib. com
April 22, 2009

Physics
A beam of unknown charged particles passes at right angles to the direction of magnetic field of 9.0x10^-2 T. If the speed of the particles is 3.0 x10^4m/s and the force experienced is 8.64x10^-16N, how many electric charges are carried by one particle? my Work: F = qvB q = F/...
April 22, 2009

Physics
yes, 0.45 T thanks for checking!
April 22, 2009

Physics
A current-carrying wire is oriented at right angles to a uniform magnetic field. If the length of the wire is 0.50 m and it experiences a force of 0.90 N while carrying a current of 4.0 A, what is the strength of the magnetic field? I did the work and got: 0.45 ...???
April 22, 2009

physics
thought so, thanks
April 13, 2009

physics
There are four coils of wire being used as electromagnets. They all have the same size and are made up of the same material but have a different number of loops. Which coil will produce a magnetic field with the maximum strength when the same amount of current passes through ...
April 13, 2009

Physics
there are four right hand rules, I will re-read it so the second one is b thanks
April 13, 2009

Physics
The polarity of an electromagnet can be determined using the second right-hand rule. A. True B. False Is it B? Current passing through a conductor is increased from 10 A to 15 A. This decreases the strength of the magnetic field produced by the conductor. A. True B. False Is ...
April 13, 2009

Physics!!!
When does a magnetic field induce maximum EMF in a wire moving with a constant velocity? A. When the wire is moved at an angle of 60 degrees to the direction of the magnetic field B. When the wire is moved at right angles to the magnetic field C, When the wire is moved ...
April 12, 2009

physics
When does a magnetic field induce maximum EMF in a wire moving with a constant velocity? A. When the wire is moved at an angle of 60 degrees to the direction of the magnetic field B. When the wire is moved at right angles to the magnetic field C, When the wire is moved ...
April 12, 2009

Physics!!
thanks
April 12, 2009

Physics!!
An electromagnetic wave is produced by: A. an accelerating charged particle or changing magnetic fields B. an accelerating uncharged particle and changing magnetic fields C. a stationary charged particle and a magnetic field D. any moving particle and a magnetic field I think ...
April 12, 2009

Physics
An electromagnetic wave has a wavelength of 6.2 x 10^14 m. What is the frequency of the wave? A. 2.0 x 10^6 Hz B. 4.8 x 10^-7 Hz C. 1.8 x 10^24 Hz D. 5.3 x 10^-22 Hz I got B..? When the currents in two parallel metal conductors are in the same direction, the conductors ____ ...
April 11, 2009

Physics
The polarity of an electromagnetic can be determined using the second right-hand rule. A. True B. False Is it false? Current passing through a conductor is increased from 10 A to 15 A. This decreases the strength of the magnetic field produced by the conductor. A. True B. ...
April 11, 2009

PHYSICS
I know, it's annoying.... I'm just putting A..
April 8, 2009

PHYSICS
When a conducting sphere is charged positively, initially the charge is deposited on the left side. However, due to the sphere's conducting nature, the charge spreads uniformly throughout the surface to the sphere. Charge is uniformly distributed because: A. charged atoms ...
April 8, 2009

physics
okay so it's A, A
April 7, 2009

physics
so 1-a 2- b
April 7, 2009

physics
In a series current, each circuit has the same: A. current B. voltage C. capacitance D. resistance If a resistor is added to a series circuit, the equivalent resistance: A. increases B. decreases C. remains the same D. becomes zero
April 7, 2009

10 th grade math
3(4^2-4) 3(16-4) 3(12) 36<--answer
April 7, 2009

physics
I know, I think they left out words or something... I'm just going to put C...
April 7, 2009

physics
A 15.0 resistor and a 20.0 resistor are connected in parallel. A 5.00 resistor is connected across a 1.00 10^2-V battery. What is the current flowing through the 20.0 resistor? A. 1.21 A B. 3.15 A C. 5.00 A D. 6.84 A I don't think it's C....
April 7, 2009

physics
When two bodies are charged, the total charge before and after charging remains the same because of: A. quantization of charges B. conservation of charges C. law of induction D. Coulomb's law it is B? When a conducting sphere is charged positively, intially the charge is ...
April 7, 2009

physics
okay so it is B. positively charged that's a neat website
April 7, 2009

physics
A negatively charged balloon sticks to a wooden door. However, an uncharged balloon does not stick to a wooden door. What is the nature of the charge on the wooden door? A. Electrically neutral B. Positively charged C. Conductor D. Lacking protons I am thinking it is A or B?
April 7, 2009

Physics
thought so, thanks
April 7, 2009

Physics
Which of the following statements is true about electric forces? A. Electric forces cause objects to only attract each other. B. Electric forces cause objects to only repel each other. C. Electric forces cause objects to repel or attract each other. D. Electric forces have no ...
April 7, 2009

french
to have
April 7, 2009

5th grade
you would subtract 8-2 which equals 6. this would give you 6/8 which is 3/4
April 7, 2009

psychology
The second one is correct. I am not sure about the first one though.
April 7, 2009

Physics...please help
A beam of light passes from air to ethanol, with index of refraction of 1.36. If the angle of incidence ( 1) is 30.0 degrees, then calculate the angle of refraction, after light passes through ethanol and enters into air. A. 15.3 degrees B. 21.6 degrees C. 30.0 degrees D. 39.8...
April 6, 2009

physics...
Light passes from air into water at 45.0 degrees to the normal. If the index of refraction of water is 1.33, find the angle of refraction. A. 25.5 degrees B. 32.1 degrees C. 44.0 degrees D. 55.9 degrees I believe it is B? What is the nature of an image formed by a concave ...
April 6, 2009

Check for mistakes plz
no problem (:
April 6, 2009

Pages: <<Prev | 1 | 2 | 3 | 4 | Next>>

Search
Members