Science & Mathematics - 22 October 2007

1x + 1y + 5z = 9
2x + 3y + 9z = 17
-1x + 3y - 8z = -11

I got this far:

1 1 5 9
2 3 9 17
-1 3 -8 -11

2007-10-22 07:29:49 · 4 answers · asked by Byron 1 in Mathematics

2x + y = 6
x² + y² = 20

2007-10-22 07:27:51 · 11 answers · asked by Leo 3 in Mathematics

I know why the Electron Transport Chain stops due to the lack of O2, but why does the Kreb Cycle stop as well?

I thought Kreb Cycle didn't require oxygen directly to function?

2007-10-22 07:23:23 · 0 answers · asked by Dave H 2 in Biology

express in the form a(x-h)^2 + k

2007-10-22 07:19:05 · 2 answers · asked by Anonymous in Mathematics

2007-10-22 07:16:54 · 7 answers · asked by tallest 1 in Zoology

biology answert it.........................................................

2007-10-22 07:14:15 · 6 answers · asked by Vicky dude 1 in Biology

49^2-9=0

b^2-5b=0

a^2-9a+20

0=v(v+4)

2007-10-22 07:13:57 · 10 answers · asked by Belki C 2 in Mathematics

Is there a set number of galaxies or are they being constanly formed?

2007-10-22 07:07:28 · 7 answers · asked by theoraredhead 1 in Astronomy & Space

These problems are just totally throwing me for a loop! I am terrible at math and don't know why the person in charge of classes assigned me to this.

5 - 9w = 23
17 = 7 + 8y
-2.5d - 32.7 = 74.1

Thanks!

2007-10-22 07:04:46 · 7 answers · asked by jacobsbeffie 1 in Mathematics

2007-10-22 07:04:30 · 11 answers · asked by robinmorton1993 1 in Mathematics

A vector A points 14° from the x axis. Vector B is twice as long as A. Their product A×B has length A^2 and points in the negative z direction. What is the direction of the vector B?

2007-10-22 07:01:47 · 2 answers · asked by wil 1 in Physics

I have a circuit board I am trying to redesign but there are three SMT parts that have NO markings on them. They are extremely small and I used a magnifier to take them off and look for a PN or something. There are NO destinguishing marks on them. They all have two contacts so I figure they are either a resistor, a diode, or a capacitor. Does anyone have any idea on how I could test the to see what they are and what there values are.

Thanks

2007-10-22 06:59:21 · 2 answers · asked by wormterp 1 in Engineering

If this is true, can we conclude that the Sun is getting smaller every day?

2007-10-22 06:59:10 · 8 answers · asked by Cory 2 in Astronomy & Space

Why is x the letter everyone uses? It is the main variable, it is an axis, why x? Anyone with little tidbits of knowledge know the answer?

2007-10-22 06:58:55 · 6 answers · asked by Lorianna 2 in Mathematics

1. The mass m1 is 0.63 kg and it is located at x1 = 30 cm. The pivot point is located at x = 45 cm. The mass of the meter stick (mms = 0.40 kg) is located at its geometric center, xms = 50 cm. The mass m2 is 0.35 kg and it is located at x2 = 80 cm. Calculate the net torque (in N⋅m with the proper sign) due to these three weights (Use g = 9.8 m/s2).



2. Suppose that a meter stick is balanced at its center. A 0.27-kg is positioned at 20 cm from the left end of the meter stick. Where should a 0.30 kg mass be placed to balance the 0.27 kg mass? Express your answer in terms of the position (in cm) of the 0.30-kg mass as measured from the left end of the meter stick.

2007-10-22 06:56:38 · 1 answers · asked by davidbbk 1 in Physics

90% of the time these tragedies seem to occur in California, and often in areas where the celebrities have their vacation homes such as Malibu. Year after year we hear about these fires in the news.

How come Washington state, British Columbia, the east, etc don't suffer from these fires as often as California (note Florida had fires in 2006).

2007-10-22 06:55:16 · 7 answers · asked by Tom S 7 in Weather

2007-10-22 06:53:51 · 11 answers · asked by Anonymous in Mathematics

2007-10-22 06:53:38 · 2 answers · asked by david s 1 in Astronomy & Space

Find two quadratic unctions with zeros x= -1 and x=2.........I already found one of the equations which ended up being x^2-x+2 but im not sure on how to find the second equation
Thanks you math people...I'd be lost with out yous

2007-10-22 06:50:54 · 3 answers · asked by ELECTRA 1 in Mathematics

HgO -----> Hg + O2
H2 + O2 -----> H2O

could you balance these QUICKLY

2007-10-22 06:48:55 · 9 answers · asked by bubaloo_u_2 1 in Chemistry

A: Pure enantiomers rotate the plane of plane polarized light.

B: All chiral compounds rotate the plane of plane polarized light.

C: By using the density of a compound, and it's configuration, we can always calculate the observed rotation of plane polarized light.

2007-10-22 06:47:11 · 2 answers · asked by student217 1 in Chemistry

2007-10-22 06:44:50 · 7 answers · asked by scott.charles 2 in Geography

2007-10-22 06:44:30 · 1 answers · asked by student217 1 in Chemistry

1) 2-methyl-2-butene +O3===>
2) 2-butene + perbrnzoic acid===>
3) 2,3-dimethyl-2-butene + KMnO4/OH===>
4) cyclohexene + KOC(CH3)3/CHCL3===>
5)ISObutene + CL2 / H2O===>

2007-10-22 06:43:05 · 1 answers · asked by mohamed r 1 in Chemistry

2007-10-22 06:36:10 · 2 answers · asked by Clarence P 1 in Engineering

A lattice point on the xy-plane is any point (p,q) where both p and q are integers.
Suppose you have a line passing through the origin with irrational slopeExamples of lattice points are the points (1,2) (1,3) (1,4) (2,2) (2,3) (-2,3) (45,56) (10000, 10003) (-34,55). Examples of points which are not lattice points are (1/2, 3) (4,5/6) (√2, 5) (pi,4). Explain why such a line can never pass through a lattice point.
This is one of my math questions but i cant seem to figure it out?!

2007-10-22 06:32:19 · 3 answers · asked by i 1 in Mathematics

2007-10-22 06:32:15 · 2 answers · asked by Ladan T 1 in Mathematics

Please describe the correlation between the burning and using of non-renewable resources and the progression of global warming/climate change.

2007-10-22 06:30:51 · 3 answers · asked by dgoodnight3001 2 in Earth Sciences & Geology

2007-10-22 06:30:11 · 3 answers · asked by Lorraine F 2 in Botany

Have to write a current event on any natural hazards that have recently happened (within the last week or so). Anyone know of any earthquakes, floods, volcano eruptions, etc.

2007-10-22 06:27:41 · 3 answers · asked by Phantoms 2 in Earth Sciences & Geology