Mathematics - 8 November 2007

x+2y=1
4x+y=11

2007-11-08 04:18:11 · 4 answers · asked by Anonymous

Infinitely many smaller red circles are tightly packed between black circles, as shown in the picture:
http://i18.tinypic.com/6xion4p.gif

(All circles which can tauch are tangent)
What is combined area of red circles?

(a) 1 / 12
(b) π / 12
(c) π (π+3) / 12
(d) π (π+3) (π-3) / 12

2007-11-08 03:42:56 · 2 answers · asked by Anonymous

Ok i'm in algebra I i am learning about graphing linear equations using standard form our class got cut short so we didnt finish the lesson, we still got homework on it and i'm really confused, if anyone could please help me i would greatly appriciate it, umm these are 2 of the problems;

6 + y = 8

4x - 2y = (-1)

Thank You sooo much!!!!!!!!

2007-11-08 03:29:28 · 2 answers · asked by Livvie 1

The answer is 2+log(base5)X. Can somebody explain this please and if they know a website that explains this that would be helpful too, thanks.

2007-11-08 03:27:07 · 5 answers · asked by Jeter is my hubbie 3

Consider the set of all possible sequences {a_n}, where the terms of each sequence a_1, a_2, a_3 ... are each non-negative integers. What is the cardinality of this set? Prove it.

Hint: If the possible values of a_1, a_2, etc. were restricted to {0,1, 2, 3, 4, 5, 6, 7, 8, 9}, it would be obvious that each sequence could be mapped to exactly one real number in [0, 1], so the cardinality of the set of sequences is AT LEAST as big as C (the cardinality of the real numbers in [0, 1]). But each of the members of the sequence can take on any positive integer value, so it could be larger than C.

This has implications. This cardinality is the same as that of the set of all functions that map rational numbers into rational numbers.

2007-11-08 03:14:09 · 2 answers · asked by ? 6

i looked at a previous example which had the limit of (1/1/2x)^3x as x approaches positive infinity. You make 2x equal to some variable u so x=u/2. so it would be the limit (1+1/u)^3(u/2). You put the u as a power of (1+1/u), which gives you e to the 3/2 power as the answer.

So, I'm trying to use that principle to apply here. Could someone help? Thanks

2007-11-08 02:54:42 · 3 answers · asked by desigal 5

show that v1 and v2 are linearly independent

2007-11-08 02:54:42 · 1 answers · asked by Vince 1

Teacher Arrested in New York...> NEW YORK, NY - A public school
teacher was arrested today at John F.Kennedy International Airport as he
attempted to board a flight while in possession of a ruler, a protractor, a
set square, a slide rule and a calculator.
At a morning press conference, Attorney General Alberto Gonzales said he
believes the man is a member of the notorious Al-gebra movement. He did not
identify the man, who has been charged by the FBI with carrying weapons of
math instruction. "Al-gebra is a problem for us," Gonzales said. "They
desire solutions by means and extremes, and sometimes go off on tangents in
a search of absolute value. They use secret code names like 'x' and 'y' and
refer to themselves as 'unknowns', but we have determined they belong to a
common denominator of the axis of medieval with coordinates in every
country.
As the Greek philanderer Isosceles used to say, 'There are three sides to
every triangle'."
When asked to comment on the arrest,

2007-11-08 02:53:20 · 6 answers · asked by john n 3

hey can u help me with my hw thax, ohh and show the steps and explain PLLEEEZ
10x-14-x= -5
thax more questions to follow

2007-11-08 02:50:08 · 9 answers · asked by Queen of Boredom 2

justify or give counterexamples as appropriate.

2007-11-08 02:37:18 · 4 answers · asked by Vince 1

I did the next step by differentiating and got 3sec^2(3x)/5sec^2(5x). How do i go further to prove it? i wish i could just say the answer was 3/5.......

2007-11-08 02:33:41 · 3 answers · asked by desigal 5

show v1 and v3 are linearly dependent.

2007-11-08 02:32:59 · 1 answers · asked by Vince 1

v^2=u^2 + 2as

make e the subject

v= sq..rt 2(e-mgh)/m

2007-11-08 02:26:44 · 1 answers · asked by master 2

its a Triangle cut in half I think?



~AC = 16, ~BC = 24 and ~AB =20

~CD bisects point A and point B

Point D is between Point A and Point B

solve for ~AD and ~DB

Hint: AD = x
DB = 20 -x

(i hate math)

2007-11-08 02:16:45 · 7 answers · asked by Anonymous

12. A regular octagon has a perimeter of 56 feet. Find the length of each side.
The length of a side is:
A. 9.3 ft
B. 7 ft
C. 14 ft
D. 3.5 ft

19. Find the number of sides of a regular polygon if the sum of the measures of the interior angles is .
The number of sides is:
A. 9
B. 7
C. 5
D. 3

2007-11-08 02:12:27 · 3 answers · asked by Anonymous

6. Find the number of sides of a regular polygon if each interior angle measures .
The number of sides is:
A. 20
B. 16
C. 24
D. 18
7. The sum of the measures of the exterior angles of a regular hexagon is:

A. 720°
B. 1440°
C. 1080°
D. 360°
8. Use the following polyhedron to answer the question.

The number of vertices is:
A. 12
B. 10
C. 8
D. 6
9. The side of a regular pentagon is 12 cm. Find the perimeter.
The perimeter is:
A. 60 cm
B. 72 cm
C. 30 cm
D. 36 cm
10. Use the following polyhedron to answer the question.

The number of faces is:
A. 5
B. 4
C. 3
D. 6
11. The measure of each interior angle of a regular decagon is:

A. 144°
B. 36°
C. 108°
D. 150°

2007-11-08 02:09:19 · 3 answers · asked by Anonymous

Given that m * l = m²-lm
Evaluate 5 * 3

Solve for g given that g * 4 = -3

2007-11-08 02:08:24 · 1 answers · asked by wendi_just4u 2

x^2 + x + sqrt[x^2 + x] - 2 = 0


I am just plain confused about eliminating the square root, etc.

2007-11-08 01:58:26 · 5 answers · asked by Anonymous

Bonus Question

find or prove (incorrect or correct) or find the relation b/w i=1/i

2007-11-08 01:53:51 · 3 answers · asked by (ƸӜƷ) 1

can you make x the subject of the following expressions?

t = 7 - 4x

t = x + 1 / x - 1

y = x^2 - 3 (x squared)


Thanks in advance

2007-11-08 01:48:52 · 3 answers · asked by mg© - anti VT™ MG AM© Fundi4Life 6

(a) (2 ln y +y^ 2/ x ^2) dx +( x^2 / y - 2 y ln x )

(b) 2ty / t^2 +1 - 2t - ( 2 - ln ( t^2 + 1 )) dy/dt =0

(c) Find the solution of the linear differential equation
x dy/dx +2=x^2 -x +1

2007-11-08 01:45:00 · 2 answers · asked by fm_hyudin 1

a plane whose air speed is 150 miles per hour flew from abbot to blair in 2 hours with a tail wind. on the return trip against the same wind the plane was still 60 miles from abbot after 2 hours.

2007-11-08 01:39:38 · 1 answers · asked by Anonymous

As regards mathematical problems put by students seeking solution I have to make a request to all.

Never give full solution. Many children ask questions expected to be solved by them only. In fact they avoid the labour required for a solution. Perhaps they are not aware that they are harming their learning process.

2007-11-08 01:24:22 · 12 answers · asked by Pramod Kumar 7

@ means angle

In figure ABDE (its a trapezoid with a triangle draw in)

@ BDC = 65
@ C = 65
Line MP II line AB
Line BN = 6
Line ND = 2
Line PC = 2
Line EC = 11.4
Line AB = 6

Solve

Line BP = ?
@ 1 = ?
@ 3 = ?
Line MP = ?
@ 2 = ?
@ ABP = ?

Heres the picture I have.(angles in red)

http://img136.imageshack.us/img136/2930/helpmeimadieyl8.jpg

2007-11-08 01:16:15 · 1 answers · asked by Anonymous

Hence or otherwise, determine the minimum value of 3x² +8x-25

Solve the equation 3x² +8x-25=0

2007-11-08 01:01:16 · 4 answers · asked by wendi_just4u 2

I know that at a radius of 11.5 cm there are 8000 lables on this reel, and i know at 4.5 cm there are zero lables (the reel hub radius). My mind had drawn blank on working out a scale or equation for working out the intermediate points. (basically i need a way to simply measure the remain radius and know how much is left.

2007-11-08 00:56:49 · 1 answers · asked by coolmoejay 2

A) x + 1
B) x + 1/3
C) 3x + 1
D) 3x + 1/3
E) 3x + 3 1/3

2007-11-08 00:54:03 · 3 answers · asked by Killa 1

2007-11-08 00:31:10 · 7 answers · asked by Cinn 1