Mathematics - 10 December 2007

equation 1: (20-2y)=5x, equation 2: (26-4y)=3x use elimination please show me the complete solution. thanks

2007-12-10 23:57:08 · 6 answers · asked by chuchu 2

Plz explain why

2007-12-10 23:55:12 · 5 answers · asked by nonay 1

can any one say the integral of root cos x did this exists if not say the reason

2007-12-10 23:00:52 · 2 answers · asked by anjith g 1

2007-12-10 22:44:30 · 10 answers · asked by Anonymous

2007-12-10 22:34:41 · 3 answers · asked by Colin H 1

geraldo and luisa hernandez operate a small laundry. luisa, working alone, can clean a day's laundry in 9 hrs. geraldo can clean a day's laundry in 8 hrs. how long would it take them if they work together?

2007-12-10 21:57:36 · 4 answers · asked by gca18 1

For simplification sake, assume that the chances of life spontaneously and randomly occurring from non-life is 1 in 1 million.
Now extend the time period out for that event to occur to 1, 3, 4, or even 6 billion years. Does the probability change because the time allowed for it happen has increased? Meaning, will the 1 in one million chance have better odds over time?
Please give an equation and state the value for time and how it effects the probability. Thank you.

2007-12-10 21:47:48 · 7 answers · asked by Last Ent Wife (RCIA) 7

U hav to use the number 4 exactly 4 times in each equation to make it equal to nos.1-9.u can put any mathematical operations in between but after one 4 only.
for eg: 4 divided by 4 + 4 - 4=1
now do from nos.2-9

2007-12-10 21:46:00 · 7 answers · asked by Priyanshi K 1

2007-12-10 21:28:44 · 5 answers · asked by Anonymous

Find the value of x and y

1) 3x - y + 4z = -7
2x + y - z = 16
5x - 3y + 2z = -13

2) 4x - 3y = 5
-8x + 6y = 7

2007-12-10 21:22:28 · 2 answers · asked by Anonymous

(1+cosecx)^1/2
1/(sinx)^4+(cosx)^4
1/(sinx)^6+(cosx)^6

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2007-12-10 20:49:01 · 2 answers · asked by Anonymous

7/8 divided by 1/2
and
1/4 divided by 3/8

I'll give ten points for the correct answer!

2007-12-10 20:22:22 · 10 answers · asked by Brittnie T 2

What is the difference between them?
what is the meaning of P(x>4 + var(x))?

2007-12-10 20:20:06 · 4 answers · asked by David Junior 3

I have 30% chance of winning the lottery tomorrow. Using this magical spell (bear with me), I increase the likelihood of winning by 100%.

Two interpretations:
1. I increase the chance by 100% (meaning 100% increase of existing 30%, becoming 60%)
2. I increase the chance by 100% (meaning additive 30% + 100%, giving me 130%, which logically gets reduced to 100%)

Which interpretation makes more sense?

2007-12-10 20:07:44 · 4 answers · asked by leikevy 5

Is it possible to draw three planes that do not intersect?
Or two lines that aren't on the same plane?

Isn't the paper I'm doing the homework a plane, so it's impossible?

2007-12-10 19:30:26 · 9 answers · asked by ducky 2

how many significant digits does this number has 0.01050

2007-12-10 19:29:47 · 1 answers · asked by Anonymous

2007-12-10 19:18:17 · 3 answers · asked by Anonymous

I have no idea what this means?

2007-12-10 19:12:21 · 3 answers · asked by ryan 1

7m2 � 9m + 2
a) (7m � 2)(m + 1)

b) (7m � 2)(m � 1)

c) (7m + 2)(m + 1)

d) prime

2007-12-10 19:02:32 · 2 answers · asked by Jazz 2

2007-12-10 18:56:21 · 3 answers · asked by johnny b 2

The ratio of boys to girls is 6:4.60% of the boys and 40% of girls take lunch in the canteen.What % of class takes lunch?

2007-12-10 18:18:40 · 3 answers · asked by nike 1

consider the following sample of three scores: 2, 4, and 6. the best estimate of the population standard deviation would be.. what? im so confused. please help me!

thank youu!

2007-12-10 18:14:05 · 3 answers · asked by arienette 2

A bus traveled 10.0 km from the north end of the city to the south in 10.0 minutes. The average speed of the bus was 16.7 m/s
is that right?

2007-12-10 17:54:28 · 5 answers · asked by Anonymous

Please give me step by stepon how to solve these two problems, thank yooouuu!! >_<

-Write the equation in standard form with integer coefficients:

1) x+3y-4=0

2)2x-3y-14=0

2007-12-10 17:54:00 · 3 answers · asked by Victoria L 1

2007-12-10 17:52:17 · 5 answers · asked by kcnevets 1

well i must find the unit vector of point A to a point equidistant from B&C on the line BC. i'm really in trouble.

2007-12-10 17:46:21 · 2 answers · asked by gizmo 2

If the natural length of helical spring is 10 inches and if it takes a force of 3 pounds to keep it extended 2 inches, find the work done in streching the spring from its natural length of 15 inches

2007-12-10 17:27:49 · 1 answers · asked by msmall13 1

okay, so I got this review worksheet in math today for a quiz tomorrow, and I still don't get it! I asked for help and got some of it but most I don't get. I need help with this equation please:

-4x-9=5x+99

I know you have to like subtract something from either side...

thank you!

2007-12-10 17:07:10 · 6 answers · asked by arielbrite 1

2007-12-10 17:07:08 · 2 answers · asked by Francisco C 2

3, 7, 11, 15...

The question: The first 4 terms in a sequence are shown above. Each term after the first is found by adding "x" and to the term immediately preceding it. Which term in the sequence shown above is equal to 147?

The answer: 37

The formula: 3+4 (n-1)= 147

In the formula, I don't understand where and what "n" is and equals.

2007-12-10 17:06:43 · 3 answers · asked by . 2