Mathematics - 11 December 2007

If set A= {2,4,6,7} B= {3,5,7,8} C= {2,5,6,7}

Find (A union C)intersection B

Please help. thank you so much.

2007-12-11 09:14:59 · 8 answers · asked by Earl 1

a line with slope 3, intersects a line with a slope 5 at the point (10,15). what is the distance between the x-intercepts of these two lines?
please show work, of how to arrive at answer
thanks in advance for your help! ~USA~

2007-12-11 09:13:29 · 4 answers · asked by ~USA~ 2

3x=9
3x-5=7-x

the x is not a multiplication sign

2007-12-11 09:06:34 · 11 answers · asked by Sarah 1

The perimeter of a rectangular rug is 120 feet. Its width is 24 feet. What is the distance between the two corners of the rug that do not share a common side? Show your work.

2007-12-11 09:03:10 · 1 answers · asked by Anonymous

i tend to get confused with anything more complicated! Thanks!

2007-12-11 08:59:49 · 3 answers · asked by kate 1

Menelaus' Thoerem: Suppse there isa triangle ABC. If AF/FB * BD/DC * CE/EA = -1, then EDF is collinear.

How is it possible to have ratio of lengths be equal to -1 when multiplied together?

Please explain what this theorem means.

2007-12-11 08:59:09 · 3 answers · asked by UnknownD 6

my son is working on meters or km and cm and inches

2007-12-11 08:58:40 · 3 answers · asked by Anonymous

In ΔGHL, K is the midpoint of segment LG, and J is the midpoint of segment LH. Find KJ.

KJ= 2x + 2

*This is the triangles corresponing base*
GH= 5x - 3

According to the Triangle Midsegment Theorem for any triangle -

The length of the midsegment is equal to one-half the length of its corresponding base.

But this problem is confusing, can someone please help me and answer this problem step by step and explain please.

You will be very helpful


Thanks

2007-12-11 08:55:45 · 3 answers · asked by Anonymous

if so write it in standard form
5y=-7x-8y

2007-12-11 08:50:42 · 6 answers · asked by Forevercool F 2

∫sin x cos x dx (pi,0)

2007-12-11 08:46:18 · 1 answers · asked by chuckgraduate05 1

Use the Laplace Transform to solve the given system of differential equations.

dx/dt = -x + y
dy/dt = 2x
x(0)=0, y(0)=1


THANKS!

2007-12-11 08:39:04 · 2 answers · asked by dtsairman 3

7/12 x 3/7

2007-12-11 08:17:25 · 4 answers · asked by - 1

I've just spent hours and hours doing maths (in case you couldn't tell by the question). Logic would say that when you have a graph with two lines and you calculate the x and y axis cross points and draw the graph that the point where the two meet would be accurate on the graph after you solved the in-equation of the two lines i.e I drew a graph very carefully, drew in the lines, made sure the scale was ok, but then when I calculated the meeting point it wasn't anything like on my graph. I've spent almost two hours with my boyfriend trying to figure out where I went wrong, he can't find it.. I can't find it.. how come things that work sometimes don't work on others? It's supposed to be math after all ;)

2007-12-11 08:13:50 · 2 answers · asked by Anonymous

2007-12-11 08:11:36 · 20 answers · asked by johnmajka66 1

we are on proving identities in trigonometry and i dont understand this

sec + csc
---------- == sec
1 + cot

how do i get one side equal to the other, can you explain to me???

2007-12-11 08:10:54 · 2 answers · asked by molly 1

2007-12-11 07:57:49 · 5 answers · asked by Cookie A 1

2007-12-11 07:57:21 · 9 answers · asked by Anonymous

2007-12-11 07:56:13 · 10 answers · asked by Anonymous

How do i work out 3/8 as a decimal without a calculator?

2007-12-11 07:51:55 · 13 answers · asked by L B 4

2007-12-11 07:43:39 · 10 answers · asked by Lisa S 1

I'm a mathematician aswell?

2007-12-11 07:37:20 · 9 answers · asked by IloveNewYork 1

how many machines will be needed to complete a task in 15 days given that it takes 10 days for 6 machines to complete the same task?

We had to do this before, but have forgotten the procedure! Thanks in advance for any help!

2007-12-11 07:37:14 · 4 answers · asked by PETEPUMA 3

Please could you help me solve the following. A method for working it out would be great. thanks for your help.
Jane's salary increased by 5% to £15750 . what was her salary before the rise?

2007-12-11 07:36:20 · 6 answers · asked by Anonymous

If the vertex of a parabola is at (3, -2) and one x-intercept is -5, what is the other x-intercept?
I've got it narrowed down to four choices, but can't figure it out..which of these four choices is it?
6
-11
10
or
11

2007-12-11 07:31:54 · 5 answers · asked by Anonymous

Let g(x) = [c(x^2 - 9)/(x-3)] + 4 if x does not equal 3 and g(x) = 6 when x = 3... for what value(s) of c, if any, is g continuous at 3?

2007-12-11 07:26:24 · 3 answers · asked by Anonymous

7.8 x 10^-4/ 3.9 x 10^8

2007-12-11 07:23:53 · 1 answers · asked by Anonymous

2007-12-11 07:23:21 · 1 answers · asked by irs 1

a flat wire 20cm long is placed in a magnetic field with strenght 0.10T and perpendicular to it.. A current of 1 ampere is induced in the wire. Find the resulting force on the wire if the force is given by F[arrow above]= LI[arrow above on i] X B[arrow above].
L is the lenght of wire, I is current and, B is the magnetic field.

Plz. show/explain every steps.

2007-12-11 07:20:34 · 2 answers · asked by Anonymous

A magnetuic field (B[with arrow above]) exerts a force on an electric charge (q )moving at a given velocity (v[with arrow above]). The force is the cross product given by F[with arrow above] = qv[arrow above{on v only}] x B[arrow above]. Find a force acting on a proton (q= 1.6 x 10^-19 C) moving at 3/4 speed of light (3.0 x 10^8 m/s) perpendicular to the field.

please show every step of the problem

2007-12-11 07:15:29 · 1 answers · asked by Anonymous

2007-12-11 07:15:06 · 1 answers · asked by Anonymous