Science & Mathematics - 15 February 2007

2007-02-15 00:17:20 · 12 answers · asked by cfwoehr 2 in Astronomy & Space

2007-02-15 00:16:38 · 5 answers · asked by amnesty 2 in Other - Science

2007-02-15 00:15:49 · 4 answers · asked by Francien J 1 in Zoology

Hi everyone, I have a few Algebra questions I have to do for a assignment..I did not study this properly because I broke my leg and was away for a while (bummer)..please if you can also explain it to me I would greatly appreciate it...

Use elimination to solve the system of equations given by 3x - 2y = 12 and 3x + 5y = 33...
A.)(6, 3)...
B.)(15, 14)....
C.)(-7, 9)...
D.)(-11, 12)...
Question 2...
Which point is a solution to the system of inequalities: y > 4x and y > -2x - 3?...
A.)(2, -200)...
B.)(0, 10)...
C.)(1, 3)...
D.)(-2, -10)..
Question 3...
Solve the system of equations given below.
5x + 4y = 25
3x + 4y = 15...
A.)(5, 0)
B.)(0, 0)
C.)(0, -5)
D.)(-5, -5)
Question 4...
Use elimination to solve the system of equations given by 10x - 4y = -20 and 10x - 5y = 35....
A.)(12, -12.5)...
B.)(50, 20)...
C.)(-24, -55)...
D.)(24, 55)...
Question 5...
Multiply: (x - 1)(x + 1)(x - 3)(x + 3)...
A.)x^4 - 10x^2 + 9...
B.)x^2 - 10x + 9...
C.)x^4 - x^2 + 3...
D.)2x^4 - 10x^2 + 19...
Thank You!

2007-02-15 00:11:55 · 3 answers · asked by Anonymous in Mathematics

(Caoticamente says to be birth of stars the 12 billion year-light of the land) As it explains the time of that already if they had formed, if in cosmology, the Big Bang is the scientific theory that the universe emerged extremely of a dense and hot state has about 13,7 billion years.

2007-02-15 00:09:30 · 6 answers · asked by britotarcisio 6 in Astronomy & Space

if a object is in lift .the object has acceleration "a"when it is going upwards and the apparent weight of the object is 72N.if the lift is moving downwards it has acceleration "2a" and the weight of the object is 36N.what is the mass of the object?

2007-02-15 00:08:29 · 2 answers · asked by Anonymous in Physics

or however you spell that?

2007-02-15 00:07:46 · 4 answers · asked by Anonymous in Botany

2007-02-15 00:06:51 · 5 answers · asked by Anonymous in Biology

What tips can you give for taking care of this amazing and wonderful plant? It just spreads so much joy and fills the room with colour and life. Sometimes my plants leaves get yellow so I trim the edges in an artistic way. Is this bad? Also, the roots are tangled and the lower parts that are immersed in the water form a slippery slimy surface between water changes? What is this? I also rinse the whole stick (leaves and all) each few weeks to get the dust off...etc. Should I dry them or just leave them to dry one their own? I also sometimes peel the nodes, to stimulate growth of more extensions. Is this ok? How else can I stimulate growth of more leaf branches? Any other tips and advice, or useful link? Thanks.. They all say hi btw. They're called Draca, Caena, Enas, Deriana, Sander...

2007-02-15 00:06:41 · 4 answers · asked by Pichka 2 in Botany

Hi everyone, I have a few Algebra questions I have to do for a assignment..I did not study this properly because I broke my leg and was away for a while (bummer)..please of you can also explain it to me I would greatly appreciate it...

Students from the local high school are selling tickets to the town's annual carnival. Adult admission is $5.00 and child admission is $2.50. Two hours after the carnival opens its first day, 440 tickets have been sold, totaling $1900. How many adults and how many children entered the carnival during the first two hours it was open?...
A.)293 adults, 147 children...
B.)320 adults, 120 children...
C.)220 adults, 220 children...
D.)380 adults, 760 children...
Question2..
Use substitution to solve the system of equations given by y = 2x and 5x + y = 7...
A.)(1, 2)...
B.)(2, 4)...
C.)(2, 3)...
D.)(2, -3)..
Question 3...
Use elimination to solve the system of equations given by 3x - 2y = 10 and 5x + 2y = 6...
A.)(0, 0)..
B.)(-2, -2)..
C.)(2, 2)..
D.)(2, -2).

2007-02-15 00:04:57 · 6 answers · asked by Anonymous in Mathematics

course details.what all there to study.is it interesting course.about salary.and do i need entrance.

2007-02-15 00:03:41 · 4 answers · asked by Anonymous in Engineering

FACTORS ARE
1)TEMPERATURE
2)PRESSURE
3)CONCENTRATION OF REACTANTS
4)LIGHT

2007-02-15 00:03:05 · 7 answers · asked by bittu 1 in Chemistry

2007-02-15 00:02:42 · 30 answers · asked by devil_child66662000 2 in Astronomy & Space

of 4 feet with a force that gave the ball an initial vertical velocity of 64feet per second.The equation (h = 16 Tsquare = 64 Tsquare + A)gives the height h of the baseball t seconds after the ball was hit. If the ball was caught at a height of 4 feet, How long after the batter hit the ball was the balll caught?

2007-02-15 00:02:19 · 2 answers · asked by Anonymous in Mathematics

2007-02-15 00:00:20 · 4 answers · asked by sharan k 1 in Geography