Mathematics - 18 July 2007

For example, square root of 3 and the square root of 5 yields an irrational number. If not, how would you prove that all numbers that are not perfect squares be irrational?

2007-07-18 09:02:37 · 2 answers · asked by Anonymous

1. "Simplify: ((sin x)/(1 +cos x)) + ((sin x)/(1-cos x))"
2. Find the sum of the reciprocals of two numbers whose sum is 8 and whose product is 16

2007-07-18 08:57:02 · 6 answers · asked by SeoulFlow 2

Question 1 .The standard procedure for dividing by a fraction is to turn upside down and multiply.how would you justify this rule to a child?What higher level of mathematics informs your understanding of the procedure?

Question 2.Tiles in the shape of regular hexagons can be used to cover any plane surface,but those in the form of regular pentagons cannot ,by themselves,be used to tiling an area.How might a teacher use this activity to enable children to deduce some facts about angles in polygons?How might examples from art or architecture be included to enhance study of the topic

2007-07-18 08:52:03 · 5 answers · asked by kbg 1

100e^(2x) = 600

2007-07-18 08:49:16 · 7 answers · asked by NONAME 2

2007-07-18 08:48:36 · 4 answers · asked by ~luminary legacy~ 2

cos^-1(x)......inverse cosine (x)
and how do i graph it??

2007-07-18 08:43:48 · 3 answers · asked by NONAME 2

i need to compare 2 of them by analysing them

2007-07-18 08:36:39 · 3 answers · asked by Anonymous

go to this web and answered the question 4

http://www.mtoliveboe.org/440230123102814/lib/440230123102814/summerstatistics07.pdf

2007-07-18 08:35:36 · 1 answers · asked by beauty mirna 3

I can not figure this out! Someone please help!!!!!!

2007-07-18 08:35:11 · 9 answers · asked by amber 3

thanks!

2007-07-18 08:32:03 · 4 answers · asked by Zainab 2

2007-07-18 08:29:16 · 2 answers · asked by NONAME 2

12 volunteers are to work at a school dance. Each dance requires 2 volunteers at the door, 4 volunteers on the floor, and 6 floaters. If 2 of these volunteers can't work together, then how many ways can the volunteers be assigned?

Thanks

2007-07-18 08:23:42 · 1 answers · asked by Icobes 2

"cos 2x = cos x if 0 < x <360" its less than or equal to btw. having trouble with a few problems in the math packet : /

2007-07-18 08:17:05 · 5 answers · asked by SeoulFlow 2

I thought I was doing them correctly, but I got them wrong. Can some one show me how to do it correctly, thank you.

1. a^2-2ab+b^2 / a+b
2.2x^2+x-6 /2x+4

2007-07-18 08:14:08 · 5 answers · asked by gloriousnina 2

2007-07-18 08:12:27 · 3 answers · asked by unkwown 1

Woot, forgot my basic math :(

2007-07-18 08:07:05 · 5 answers · asked by Jorm 3

Step by step including methods, formulas and workings plz?

2007-07-18 08:03:43 · 5 answers · asked by Tp 2

2007-07-18 07:58:59 · 8 answers · asked by Anonymous

It is in relation to newtons law of cooling and I have to fill in a chart where t is time in seconds, T(t) is the temp of the object
and Ta is the ambient temp
t=0 T(t)= 96.41 Ta= 26.1

I have to fill in the rest which is

T(t) - Ta
which would = 70.31

ln(T(t) - Ta)
which would = aprox 4.253

but then it asked for
delta T(t)

I don't know what to do here, I know delta generaly refers to the difference of something but Im stumped by this one.

2007-07-18 07:55:26 · 7 answers · asked by miss_kitty_1984 2

thanks

2007-07-18 07:50:27 · 3 answers · asked by Anonymous

Using combinations, determine how many diagonals are in a pentagon and hexagon.

Thanks

2007-07-18 07:50:07 · 3 answers · asked by Icobes 2

I need to put up deer fencing around individual fruit trees. How much fencing do I need to buy? I plan to put up three posts in an equilateral triangle around each tree. If the posts are 4 feet apart, and I string chicken wire in a circle around them, what length of fence do I need for each tree? That is, if I make an equilateral triangle with sides of length 4, what is the circumference of the circle that I would draw around the triangle?

Suppose I need to change the lenght of the sides to 3 feet or 5 feet? What is the general procedure/formula for calculating the circumference of such a circle? How do I calculate the diameter of the circle, based on the length of the sides of the equilateral triangle?

2007-07-18 07:39:30 · 6 answers · asked by Erika M 4

2007-07-18 07:33:06 · 2 answers · asked by Anonymous

My book is lousy at explaining so I understand please help.

2007-07-18 07:32:23 · 7 answers · asked by ray 1

If Jim has two apples, and Jake has three, why dont they just shut up and eat?

2007-07-18 07:24:10 · 14 answers · asked by Anonymous

2007-07-18 06:32:32 · 8 answers · asked by Otilia T 1

if x >y (x,y +ve integers) then can we say log x > log y

kindly provide some logic/examples in support of your answer

thanks

2007-07-18 05:55:16 · 5 answers · asked by sanko 1

I am not sure how to do this one either!!

2007-07-18 05:48:34 · 4 answers · asked by sunshine 1

At least how long is the rectangle?

2007-07-18 05:45:50 · 12 answers · asked by sheila t 1

I have two functions (well, one and its inverse) and I have to find the intersection point:

y = 0.25 ( x - 4 ) ^ 2 +2
y = 2* sqrt (x-2) + 4

The answer is (6 + 2*sqrt(3), 6 + 2*sqrt(3))

Can someone show me how to get this answer? (I tried it, but it ends up being really complicated when it's not supposed to)

2007-07-18 05:45:14 · 5 answers · asked by cutest pooky 3