Science & Mathematics - 16 September 2007

Solve the system of equations using substitution:
x=2y + 1
-6y = -3x + 3

2007-09-16 14:50:57 · 2 answers · asked by DoWHATiDO 3 in Mathematics

Question 1:

Find an equation of the line containing the given pair of points. Write your answer in slope-intercept form.

(1, -5) and (5, 3)


Question 2:
Write an equation of the line described.
Through (-2, 7), perpendicular to 2x + 7y = -53



With question two with trying to find the slope I end up with;
y=-2x/7 - 53/7 and thats where I get confused

Any help would be greatly appreciated. Thanks.

2007-09-16 14:50:06 · 9 answers · asked by Goodfella1234 1 in Mathematics

i felt dumb not knowing this. i got an answer but i still need to know if it is correct or not. so PLEASE respond and see what you come up with. thank you, bye :)

2007-09-16 14:48:27 · 2 answers · asked by Anonymous in Mathematics

2007-09-16 14:48:04 · 2 answers · asked by Grace 1 in Weather

a) CIO- b) CIO-2 c) CIO-3 d) CIO-4 e) non of these

2007-09-16 14:43:23 · 2 answers · asked by andria 1 in Engineering

Will it rain more in Los Angeles as well...?

Thank You

2007-09-16 14:42:09 · 1 answers · asked by Meh 2 in Weather

You are standing 200 meters away from the Eiffel Tower in Paris. The height of the tower is 324 m (including the flagpole). Find the length of the missing side of this right triangle. Round to the nearest meter.

2007-09-16 14:41:38 · 11 answers · asked by Anonymous in Mathematics

a) Assuming a uniform acceleration, what is the velocity of the insect after it has accelerated through this short distance, and how long did it take to reach that velocity?
velocity 3.94 m/s
elapsed time 1.065*10^-3 s
How high would the insect jump if air resistance could be ignored? Note that the actual height obtained is about 0.7 m, so air resistance is important here.

2007-09-16 14:39:41 · 1 answers · asked by Mike 2 in Physics

How do i make paper stronger by changing it's shape?

2007-09-16 14:39:36 · 2 answers · asked by drewsifer06 2 in Engineering

I know there is one in Egypt but I don't know what they are?

2007-09-16 14:39:28 · 4 answers · asked by Sarah 1 in Geography

1. An unknown solid acid is either citric acid or tartaric acid. To determine which acid you have, you titrate a sample of the solid with NaOH. The appropriate reactions are as follows:

Citric acid:
H3C6H5O7(aq) + 3NaOH(aq) ---> 3H2O(l) + Na3C6H5o7(aq)

Tartaric acid:
H2C4H4O6(AQ) + 2NaOH(aq) ---> 2H2O(l) + Na2C4H4O6(aq)

A 0.956g sample requires 29.1 mL of 0.513 M NaOH for titration to the equivalence point. What is the unknown acid?

2007-09-16 14:37:45 · 1 answers · asked by Vanessa1027 1 in Chemistry

2007-09-16 14:37:17 · 9 answers · asked by Nick S 2 in Mathematics

Two cards are drawn at random with replacement from a deck of 52 cards. What is the probability that both cards are aces?

2007-09-16 14:37:16 · 8 answers · asked by vanilla_latte62 1 in Mathematics

A sample of gaseous neon atoms at atmospheric pressure and 0 contains atoms per liter. The atomic radius of neon is 69 . What fraction of the space is occupied by the atoms themselves? Thanks everyone

2007-09-16 14:35:29 · 1 answers · asked by Giant Donut 2 in Chemistry

Two cranes are lifting identical steel beams at the time.One crane is putting out twice as much power as the other assuming friction is neglible, what can you conclude is happening to explain this difference?

2007-09-16 14:34:32 · 5 answers · asked by bklyn70 1 in Physics

I need help really bad

2007-09-16 14:32:51 · 11 answers · asked by Pat H 1 in Mathematics

science

2007-09-16 14:28:19 · 4 answers · asked by Anonymous in Other - Alternative

8x^(5/3)-24=0

2007-09-16 14:27:39 · 4 answers · asked by Anonymous in Mathematics

2007-09-16 14:27:08 · 4 answers · asked by sasha 1 in Medicine

please help me to solve this problem

2007-09-16 14:27:06 · 8 answers · asked by Pat H 1 in Mathematics

2007-09-16 14:22:13 · 6 answers · asked by Anonymous in Chemistry

And what for ?

2007-09-16 14:22:11 · 7 answers · asked by Anonymous in Medicine

2007-09-16 14:17:54 · 12 answers · asked by Anonymous in Mathematics

For the input-output matrix A, find the output required to meet the demand D.

A= {0.2, 0.4} D= (700)
....{0.3, 0.6} ......... (400)

Possible answers are the following:
a. (2, -1)
(4, 1)

b. (-6, 3)
(-6, 3)

c. (6, -3)
(9, 0)

d. (10, -5)
(14, -1)

2007-09-16 14:17:18 · 1 answers · asked by Anonymous in Mathematics

solve each absolute-value inequality ? please help me out seriously

2007-09-16 14:17:08 · 2 answers · asked by algebra 3 1 in Mathematics

The driver of a truck slams on his brakes and skids to a stp through a distance d.
If the truck carried a diff load that its mass were quadrupled, what would be the skidding distance?
____*d

2007-09-16 14:14:21 · 2 answers · asked by ひいらぎ 5 in Physics

2007-09-16 14:10:33 · 14 answers · asked by Becca G 1 in Mathematics

Given the following data:
2O3 --> 3O2 DH = -427 kJ
O2 -->2O DH = +495 kJ
NO + O3 --> NO2 + O2 DH = -199 kJ


Calculate DH for the reaction
NO + O --> NO2

2007-09-16 14:07:41 · 1 answers · asked by Ashley J 1 in Chemistry

The question is;

Find an equation of the line having the specified slope and containing the indicated point. Write your answer in slope-intercept form.

m = - 1/3; (11, -2)







So far I've gotten this;

y - (-2) = -1/3 ( x - 11)
y + 2 = -1/3x + 3 2/3
y = -1/3x + 3 2/3 - 2

But where do I go from there? and am I doing this correctly? Thanks.

2007-09-16 14:07:01 · 9 answers · asked by Goodfella1234 1 in Mathematics

Find the height and length of the base.

2007-09-16 14:06:29 · 8 answers · asked by Becca G 1 in Mathematics