Mathematics - 3 December 2007

n parallels lines between themselves are set among m parallels lines between themselves but not with the n lines.
a) How many points are made with the intersections of the lines? (Drawing the situation, I think it's easy to see that it's n.m)
b) How many parallelograms are determinated by the intersections of the lines? (Couldn't do it).
Please tell me if I was right for a), and please explain me the answer of part b. Thanks a lot.

2007-12-03 08:20:04 · 1 answers · asked by Anonymous

2007-12-03 08:19:37 · 2 answers · asked by Mina203 2

I thought it would be 1/4.

2007-12-03 08:16:51 · 3 answers · asked by ??? 4

Prove that if a,b are in Z, but a and b are different from 0, then gcd(a/gcd(a,b), b/gcd(a,b))=1.
I tried, but couldn't do it. Please help me.

2007-12-03 08:14:15 · 1 answers · asked by Anonymous

What is the sixth element in the tenth row of Pascal's triangle? For example, if we wanted to identify the second element in the fourth row, it would be a 6. This is because we use the position number to find an element in a given row.
a. 56
b. 126
c. 210
d. 256

2007-12-03 08:13:04 · 4 answers · asked by Anonymous

2007-12-03 08:10:51 · 4 answers · asked by Mina203 2

f(x)=2x²-3x-2=0

by using analyitcal methods

2007-12-03 08:08:04 · 2 answers · asked by Anonymous

What are the two geometric terms between 2 and 1/4?
a. 17/12, 5/6
b. 5/4, 1/2
c. 1, 1/2
d. 1, 0

2007-12-03 08:06:08 · 1 answers · asked by Anonymous

If you have the Square Root of 2 and you multiply it by the Square Root of 2, what do you get?

I'm stuck between 2 x Square Root of 2, Square Root of 4, and Square Root of 2.

The book doesn't tell me how to multiply these very clearly. :(

2007-12-03 08:05:59 · 9 answers · asked by hopelessmagic 3

How do you find all the points on the curve y=2x+x^-1 which have a tangent parallel to the x-axis?

2007-12-03 08:03:21 · 2 answers · asked by Anonymous

and SOLVE 6x^2-12x=0

THanks a million for your time and help!

2007-12-03 08:01:53 · 3 answers · asked by Megan Thrift 1

x^3-125

2007-12-03 08:01:04 · 2 answers · asked by Megan Thrift 1

and FACTOR this one..

4x^3 - 4x^2 - 8x

2007-12-03 07:59:01 · 3 answers · asked by Megan Thrift 1

2007-12-03 07:57:20 · 3 answers · asked by Anonymous

also.. SOLVE

(5/x+6)-(2/x-1)=14/(x+6)(x-1)

2007-12-03 07:55:06 · 4 answers · asked by Megan Thrift 1

Subtracting integers. How do you subtract 2 minus negative 1?

2007-12-03 07:49:27 · 14 answers · asked by Panda7 1

(a+b)2

2007-12-03 07:45:44 · 1 answers · asked by Anonymous

thank-you.....
prove:

1 - sin2A / cos2A = 1 - tanA / 1 + tan A

2007-12-03 07:42:46 · 3 answers · asked by Anonymous

Please help me with this and show the work. This is a fraction.Thanks

6 3/4
+3 1/8
_______

2007-12-03 07:41:17 · 19 answers · asked by Anonymous

How do you also find on the calculator? Thanks.

2007-12-03 07:39:04 · 5 answers · asked by ilovesoccer 1

My mother is working in a high school and she is helping students that need extra help. They had a math problem that my mother just knew that I could solve. I can't so I am here. We know that the answer is B. We just don't know why. Thank you for all your help.

The sides of a rectangle are in the ratio 5:7 and the perimeter of the rectangle is 96 cm. What is the area of the rectangle?

a. 980 cm2 c. 462 cm2
b. 560 cm2 d. 418 cm2

2007-12-03 07:30:30 · 8 answers · asked by onefootnaked 4

What does the Fourier sine series for f(x)=x^2 is on (0,Pi)? Can you please explain your steps? Also, what does the series converge to at x=Pi? thx in advance!:)

2007-12-03 07:29:43 · 1 answers · asked by homeboy187nic 2

Find the area between the curves given by

x = -y^2 + 3y +4 and

x = y + 1 .

2007-12-03 07:29:20 · 1 answers · asked by bradm_127 1

How do I solve this polynomial inequality?

(x – 4)(x + 2) > 0

2007-12-03 07:27:25 · 2 answers · asked by Babygurl91 1

5 paces east (0deg)
7 paces north east (45deg)
10 paces west (180deg)
7 paces north west (135deg)
I graphed it an the resultant is 117deg 11.5 paces
How do you add these vectors with the component method???

2007-12-03 07:27:11 · 1 answers · asked by jabetz1222 4

whats the derivitive of 3xsin(x)-2x ?

2007-12-03 07:19:25 · 3 answers · asked by Anonymous

2007-12-03 07:18:51 · 6 answers · asked by Anonymous

Lim ( 7/ln(x-6) - 7/x -7)
x->7

L'H rule is required I guess, I've spentnan hour on it already. Please help the answer is 7/2 but I can't seem to get it.

2007-12-03 07:18:01 · 1 answers · asked by Crew served weapon 2

A square sheet of metal has an area of 196 square inches. What is the length of each side?

The length of a swimming pool is to be three times the width. If the depth is to be a constant 4 feet and the volume is to be 4800 cubic feet, find the lenth and width.

2007-12-03 07:10:52 · 6 answers · asked by ??? 4

5 paces east (0deg)
7 paces north east (45deg)
10 paces west (180deg)
7 paces north west (135deg)
I graphed it an the resultant is 117deg 11.5 paces
How do you add these vectors with the component method???

2007-12-03 07:09:08 · 1 answers · asked by jabetz1222 4