Science & Mathematics - 9 October 2006

2006-10-09 08:35:58 · 9 answers · asked by shoom 1 in Earth Sciences & Geology

Hi guys,

Here's the question:

Points R (0,0), S (-4,y) and T (6,-3) are collinear. Find y.

I didn't know how to solve this question, so I just graphed the points. I found the answer to be y=2.

I got the answer right, but she told me to show my work.

How do I solve a question like this?!?!


Thank you guys SO MUCH.

2006-10-09 08:35:49 · 2 answers · asked by 2 days after my B day :) 2 in Mathematics

2006-10-09 08:35:12 · 13 answers · asked by Anonymous in Astronomy & Space

i have reacurring dreams that im lost at my school, i cant find my class, i wonder around looking through the window in classroom doors, trying to recognize any faces of my classmates, then i go home. disalusioned., iv had this dozens of times ove the years.

2006-10-09 08:31:28 · 3 answers · asked by samaa 1 in Other - Science

2006-10-09 08:31:09 · 7 answers · asked by Anonymous in Chemistry

suppose that 79% of hypertensives and 25% of hypertensives are classified as normatensive by an automated blood-pressure machine. Assuming that 18% of the population is hypertensive, find: (a) the predictive value positive of the blood-pressure machine. interpret your answer. (b) the predictive value negative of the blood-pressure machine.interpret your answer NOTE: please use the notation (T,D, etc) this is for a friend im trying to help her out and the subject is biostat.

2006-10-09 08:26:42 · 2 answers · asked by Anonymous in Mathematics

there is a right angle triangle with one side equals 8.7 and another side equals 11.7. what is the length of the diagonal line?

please show the equation or show your work. thanks!

2006-10-09 08:26:35 · 13 answers · asked by me 2 in Mathematics

In triangle ABC, the complement to angle A measures 38 degrees, 49 dash mark, 48 double dash mark and the supplement to angle B measures 76 degrees, 23 double dash marks. Show work.

2006-10-09 08:26:19 · 3 answers · asked by Anonymous in Mathematics

I was just thinking..If I drank a whole lotta beer and then stood on my head, would I still have to pee? If yes, why? Does this mean that pee can actually DEFY gravity?! If no, maybe we should all hang upside down from harnesses until we are done drinking because it's a nag too pee all the time.

2006-10-09 08:24:42 · 5 answers · asked by SaraG 1 in Physics

How can you stack a 400# spring on top of a 200# spring and it is noticabley softer. Approx 150# rate.

2006-10-09 08:24:17 · 2 answers · asked by glenn2101 1 in Physics

I was just thinking..If I drank a whole lotta beer and then stood on my head, would I still have too pee? If yes, why? Does this mean that pee can actually DEFY gravity?! If no, maybe we sould all hang upside down from harnesses until we are done drinking because it's a nag too pee all the time.

2006-10-09 08:24:02 · 8 answers · asked by SaraG 1 in Physics

Determine net ionic equations, if any, occuring when aqueous solutions of the following reactants are mixed.

Select "True" or "False" to indicate whether or not the stated reaction (or "no reaction") correctly corresponds to the expected observation in each case.

Sodium phosphate and potassium nitrate; No reaction occurs.

Copper(II) sulfate and ammonium carbonate; Cu2+(aq) + CO32-(aq) CuCO3(s)

Nickel(II) chloride and lead(II) nitrate; No reaction occurs.

Ammonium sulfate and barium nitrate; Ba2+(aq) + SO42-(aq) BaSO4(s)

Lead(II) nitrate and sodium chloride; Pb2+(aq) + 2Cl-(aq) PbCl2(s)

2006-10-09 08:22:59 · 2 answers · asked by Magnitudex 2 in Chemistry

does the female bird raise the young?

2006-10-09 08:22:16 · 4 answers · asked by aodom02 1 in Zoology

I need a project nothing tooo complex but yet considered a 10th grade plz and thank you so much!

2006-10-09 08:20:57 · 3 answers · asked by Kylie 1 in Physics

If you count , and keep counting what is the final number i.e. the end

eg, 10,20,30,..........100,1000,10000,100000,1000000,???????????

2006-10-09 08:20:25 · 5 answers · asked by Cyber Bob 2 in Mathematics

2006-10-09 08:20:19 · 1 answers · asked by JAY K 1 in Astronomy & Space

2006-10-09 08:19:07 · 2 answers · asked by awantwin2004 2 in Earth Sciences & Geology

Or, is the clone "new."

2006-10-09 08:18:25 · 6 answers · asked by C K 3 in Biology

2006-10-09 08:18:11 · 5 answers · asked by awantwin2004 2 in Engineering

After rolling the first ball of a frame in a game of 10-pin bowling, how many different pin configurations can remain (assuming all configurations are physically possible)?

2006-10-09 08:17:38 · 7 answers · asked by Sasha 2 in Mathematics

2006-10-09 08:13:57 · 9 answers · asked by damigurl05 1 in Physics

Two masses, M1 and M2, are initially separated by a distance, d. A force exists between them that is proportional to the product of the masses and DIRECTLY proportional to the square of their separation, with a proportionality constant C.

F = C (M1) (M2) d^2

How long does it take for the separation to become infinite? Classical physics only, please.

2006-10-09 08:10:13 · 3 answers · asked by David S 5 in Physics

My science fair topic this year is the effect of liquids on teeth. Basically, I want to get some teeth, find the initial mass, set them in liquids 24/7 for a while, and find the final mass to see how the liquids have corroded the teeth (much like the well-known project in which a t-bone is dissolved in soda). However, I would like to know, will I find a significant change in the mass of the tooth within a month's time or does it take longer than that? I don't want this to be my science fair project if it takes years for a tooth to have any noticeable loss of mass. Can anyone help me out?

2006-10-09 08:10:00 · 5 answers · asked by Anonymous in Chemistry

Find the smallest number k greater than 1 such that s(k) is true. Prove by induction S(n) is true for all n>/= k

(I found out that k should be equal or greater than 7 in order for the statement to be true, but i'm having trouble of writing the proof)

2006-10-09 08:08:52 · 3 answers · asked by Ann T 1 in Mathematics

2006-10-09 08:07:28 · 3 answers · asked by morpeh19 2 in Chemistry

If an ore car with a mass of 38000 kg starts from rest & rolls downhill.....At the end of the tracks, 18 m lower vertically, is a horizontally situated spring with constant 520000 N/m. Acceleration of gravity is 9.8 m/s^2. Ignore friction.

How much is the spring compressed in stopping the ore car (answer in m)?

2006-10-09 08:05:30 · 2 answers · asked by Dee 4 in Physics

2006-10-09 08:04:58 · 6 answers · asked by Anonymous in Zoology

I know it takes quite a while for bigger mirrors but what about 6"mirror?

2006-10-09 08:04:57 · 6 answers · asked by 3810trebor@sbcglobal.net 2 in Astronomy & Space

(x+1)^3 (2x-5)^2

can some1 plz...plz..go through it in detail....and can u tell me what happens 2 the powers wen its all been differentiated...i mean after..... wen its all bein multiplied and added 2gether...

thanx...

2006-10-09 08:03:39 · 6 answers · asked by elli 1 in Mathematics

is 400 a prime number

2006-10-09 08:01:40 · 22 answers · asked by Anonymous in Mathematics