Science & Mathematics - 2 January 2007

2007-01-02 08:11:26 · 6 answers · asked by Kripster 1 in Biology

Directions: Write an algebraic equation for each problem.
You do NOT need to solve each equation, just put the following problem into an equation.
1. The length of a rectangle is 3 more than twice its width.The perimeter is 48 feet.
2. Fifteen more than four times a number is 6 more than five times the number. Use "n" for the number.
3. Martha and Sally had lunch together on Tuesday. Sally paid $2 more than Martha. The total bill was $5.64.
4. Bob paid $3 less than Tim at a local pizza parlor. Together they spent $7.80.
5. There were six more women on a committee than men. The committee was made up of 30 people.
6. Three consecutive integers have the sum of 153.
7. Five times the first of three consecutive even integers is fourteen more than three times the second.
8. The sum of three consecutive even integers is fifty-four.
9. An airplane flies at a rate of 356 km/h. The plane travels a total distance of 1424 km. (Use Distance = Rate * Time for your equation.)
Please help!

2007-01-02 08:11:01 · 3 answers · asked by Anonymous in Mathematics

These are really starting to frustrate me, still its the last question in my self teach book, but they never show u the friggin workings!

it says: assuming that a = e^lna (which I know is a true fact anyway) when a >0 Proove that

ln(a^n) = nlna

Now I know that alogb = logb^a. But is the above bit to throw me or what. I could proove it if I just said let b = lna^n. But the above has thrown me...again.

Any help much appreciated

I

2007-01-02 08:09:44 · 2 answers · asked by John W 2 in Mathematics

2007-01-02 08:08:49 · 12 answers · asked by Sara J 1 in Earth Sciences & Geology

2007-01-02 08:07:01 · 8 answers · asked by nat 3 in Zoology

2007-01-02 08:06:36 · 1 answers · asked by orchkris 2 in Other - Science

Gain/lose electrons, and the resulting ions are smaller/larger

2007-01-02 08:03:47 · 2 answers · asked by Lisa 1 in Chemistry

I am curious as to why mammals (apart from 2 exceptions) aren't born in eggs. Is this evolutionary? What are the advantages/disadvantages of developing in an egg or being born live?

Thanks a bunch.

2007-01-02 07:58:30 · 9 answers · asked by Anonymous in Zoology

On a level street why does it take more force to start the bike moving than it does to keep it moving?

2007-01-02 07:58:03 · 3 answers · asked by jewelsD_23 1 in Physics

2007-01-02 07:57:18 · 9 answers · asked by Anonymous in Astronomy & Space

in the equation 1/3x-2y=c i hav to solve for x, but i dont kno wer to start.

2007-01-02 07:56:52 · 3 answers · asked by JJcD 4 in Mathematics

Any thoughts on how it was supposed to work, and be selective and timed etc?

2007-01-02 07:56:15 · 1 answers · asked by Chris cc 1 in Physics

I heard and saw that deep beneath the surface of Europa there is a warm ocean. Is there a possibility that we can find other life forms? If we dig deep enough we can explore beneath there and find out.

2007-01-02 07:54:11 · 2 answers · asked by sanmandude1 3 in Astronomy & Space

2007-01-02 07:52:57 · 4 answers · asked by CuriousPaula 1 in Biology

ok heres the equation:

Co(+3) + 3OH- ---> Co(OH)3

my questions:
is this a precipitate reaction?
and
what are four metal ions that will not react with OH- in that manner?

2007-01-02 07:51:39 · 1 answers · asked by silverstar4591 1 in Chemistry

2007-01-02 07:51:10 · 17 answers · asked by JODIE M 1 in Other - Science

a boat travels 60 km upstream (against the current) in 5 hours. The boat travels the same distance downstream in 3 hours. What is the rate of the boat in still water? What is the rate of the current? THANK YOU SO MUCH

2007-01-02 07:50:28 · 10 answers · asked by *smile* =] 2 in Mathematics

Ie: has ghost stories. whether its fictional or non-fictional.

2007-01-02 07:46:40 · 15 answers · asked by lil_misschatterbox85 1 in Paranormal Phenomena

Pure water without any additions like sodium, potassium etc. For example water formed by burning of hydrogen in vaccum.

2007-01-02 07:46:02 · 16 answers · asked by the.chosen.one 3 in Other - Science

Which is the correct Roman numeral for the #4? I've always thought that IV is. Please explain. Thanks.

2007-01-02 07:46:00 · 6 answers · asked by Philippe 3 in Other - Science

has anyone made a home made hyrogen fuel cell which really works,running on water.

2007-01-02 07:44:09 · 4 answers · asked by tugboat 4 in Chemistry

O'Hare International Airport in Chicago, IL was visited by a UFO on 11/7/2006 as witnessed by pilots and employees. It was metallic, dark, perfectly round, and hovered approximately 1500 ft above the airport for 2 minutes during daylight. Before disappearing, it accellerated at very high speed through the clouds that punched a round hole through the clouds.

The FAA claimed that it did not detect the UFO on radar during the incident.

Have there been any inventions made by man that could pull or push an aircraft at very high speeds at a drop of a dime in mid air? And include cloaking technology to avoid man-made radar? (assuming the FAA is being honest about their records on radar)

(the "weather phenomenon" as the explanation for these sightings by the FAA have been dismissed as they carry no weight, no eye witness, or scientific proof that lights and/or weather could produce such aircraft illusions)

2007-01-02 07:42:54 · 5 answers · asked by jose o 6 in Astronomy & Space

2007-01-02 07:39:23 · 5 answers · asked by martin48732 1 in Physics

2007-01-02 07:38:35 · 5 answers · asked by carfan911 1 in Engineering

If the entire area is flooded with, say, 20 inches, will the water perculate up through the ground and flood your property or will the sandbags keep the water out.

2007-01-02 07:37:35 · 4 answers · asked by Ken 2 in Earth Sciences & Geology

2007-01-02 07:37:18 · 49 answers · asked by seahorse 1 in Zoology

On this research website, I cant seem to figure out Mb means when they talk about genetics; I am trying to do research on the Angelman Syndrome.

Here is the website: http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Search&db=books&doptcmdl=GenBookHL&term=407220[uid]&rid=gene.chapter.angelman#angelman.T5
or just go to http://www.ncbi.nlm.nih.gov/ and look up "Angelman GeneReviews" in books and you'll find the site in GeneReviews...

someone please help!

2007-01-02 07:36:24 · 3 answers · asked by pball0010_4 1 in Medicine

2007-01-02 07:32:32 · 20 answers · asked by GERALDINE M 1 in Mathematics

2007-01-02 07:30:35 · 15 answers · asked by Anonymous in Biology

2007-01-02 07:29:00 · 11 answers · asked by Anonymous in Geography