Mathematics - 19 August 2007

2007-08-19 06:57:31 · 5 answers · asked by Jack M 1

solve for u and v in terms of x and y and check.
x=2+3u+7v
y=-3+2u+5v

u=(x-3u-7v) /2
y=-3+2(x-3u-v) /2
am i starting out right?

2007-08-19 06:44:32 · 3 answers · asked by Anonymous

2007-08-19 06:39:55 · 4 answers · asked by Jack M 1

Okay please don't tell me "You needa do your own work" Because I have tried and dont get it!

I'm copying directly from the book.

1. Write a word problem for the numberical expression 3(4 + 3) + 2. Then simplify the expression.

2. Use the digits 1-9 in order. Insert operation signs and grouping symbols to get a value of 100. (I have tried MANY MANY MANY times and can get as close as 98 and 101.)

3. Which set of grouping symbols makes the equation true? 2 X 3 + 5 - 2 X 2 = 12
A.(2 X 3) + 5 - (2 X 2)
B. 2 X [3 + (5 - 2)] X 2
C.2 X [3 + (5 - 2 X 2)]
D.2 X ( 3 X 5) - 2 X 2

THANK YOU SO MUCH!

2007-08-19 06:37:08 · 9 answers · asked by emyliciousss 2

paint
to make the orange the shade you like you need to mix 2/3 of a bottle of red paint with each 4/5 of a bottle of yellow paint you use

you need 88 bottles of this orange paint
how many bottles of red paint will you need and how many of yellow paint will you need(all bottles are the same size)


please explain how you got the answer to win

2007-08-19 06:07:08 · 6 answers · asked by Anonymous

The pages of a textbook have uniform margins of 2 centimeters on all four sides. If the area of teh entire page is 480 square cenitmeters and the area of the printed proportion is 320 square centimeters, find the dimensions of the page.
how do you find the equation?
is it..
4(x+2)=800

2007-08-19 06:03:18 · 4 answers · asked by Anonymous

do not depend on education to answer this kind of questions,,

2007-08-19 06:03:09 · 8 answers · asked by hhawil 1

a) 5
b) 8
c) 14
d) 33

2007-08-19 06:01:23 · 2 answers · asked by Anonymous

Find the area of a trapezoid with bases 21in and 37in and a height of 15in.

2007-08-19 05:49:01 · 8 answers · asked by Adrienne W 1

Find the base of the parallelogram if the area is 120in2 and the height is 8 inches.

2007-08-19 05:40:25 · 8 answers · asked by Adrienne W 1

Find the missing diagonal of a rhombus if the area is 92ft2 and the other diagonal is 8 feet.

2007-08-19 05:38:27 · 3 answers · asked by Adrienne W 1

the answer they give is x= (e^10 - 1)/(2), but i do not know how they came to this.

2007-08-19 05:31:17 · 8 answers · asked by Anonymous

To estimate the height of a tree,two people position themselves 25 feet aprt. From the first person, the bearing of the tree is N 48 degree E and the angle of elevation to the top of the tree is 73 degree. if the bearing of the tree from the second person is N 38 degree W, estimate the height of the tree to the nearest foot.
PLEASE SHOW ME THE FIGURE, I DON'T KNOW HOT TO DRAW IT, THAT'S MY QUESTION.

2007-08-19 05:21:17 · 4 answers · asked by Zong 2

I have school starting on monday and we received a packet for summer studying if we felt neccessary a few days ago at my schools open house. Only problem is, I forgot a lot of the stuff I learned in Geometry and Algebra 2. I get good grades so I'd hate to go in there all confused. I was able to do some of the problems but not all. Here are some sample problems I need to learn how to do...

Solve the following for x:

1.) -17/8x - 4/3 = 1

2.) 51/2x - 23/3x = 6



Solve each system of equations for x and y:

1.) { 4x-3y = -6
{ x+2y = -7

2.) { 19=5x+2y
{ 1=3x-4y


Compute the products:

1.) (3x² - 2a²)²

2.) [(a+b)-4] [(a+b)+4]


Factor the following:

1.) ab-bc+a²-ac

2.) 3x² - 22x - 16



Those are just some random problems I'm having trouble with.

This is not homework, it is only a summer study packet that should get me ready for class on monday.

2007-08-19 05:14:22 · 3 answers · asked by Anonymous

2007-08-19 04:55:01 · 5 answers · asked by Anonymous

I do not even know where to begin can someone help me?

2007-08-19 04:54:13 · 4 answers · asked by Anonymous

Help please, I can not grasp this question. I would be grateful for any help.
Thank you

2007-08-19 04:45:15 · 8 answers · asked by momscharm1964 1

What is the fifth term of the expansion of (a + b)^8?

I get how to do everything up to the point where you need to find the coefficient. Somehow I missed this in my 13+ years of mathematical training, and I can't find an internet source that adequately explains how to solve this for the coefficient! Please help! Thank you! I'll pick a best answer TODAY!!!!!

2007-08-19 04:44:07 · 5 answers · asked by Anonymous

One number is 3 less than another. If 10 times the smaller number minus 3 times the larger number is 33, find the two numbers

2007-08-19 04:43:47 · 7 answers · asked by tbond_1969 1

can someone show me how do solve this problem

2007-08-19 04:23:34 · 8 answers · asked by Anonymous

1. Consider the expression
(x^2)/9 + (y^2)/4 = 1

whose graph is an ellipse. We wish to find the slopes of the tangent lines to the graph of this ellipse at the point x = 1.

a) Solve the above expression for the variable y. How many solutions do you obtain? Graph each of these solutions separately. What do you notice when these graphs are viewed together on the same set of coordinate axes?
b) While the ellipse itself is not the graph of a function (why?), each of the solutions for y you obtained in (a) does represent a function (why?). In order to obtain an answer to our original question regarding the slopes of the tangent lines at x = 1, describe what you would do with the functions obtained in (a), and carry out this operation.

2007-08-19 03:48:04 · 2 answers · asked by Anonymous

1. Consider the expression
(x^2)/9 + (y^2)/4 = 1

whose graph is an ellipse. We wish to find the slopes of the tangent lines to the graph of this ellipse at the point x = 1.

a) Solve the above expression for the variable y. How many solutions do you obtain? Graph each of these solutions separately. What do you notice when these graphs are viewed together on the same set of coordinate axes?
b) While the ellipse itself is not the graph of a function (why?), each of the solutions for y you obtained in (a) does represent a function (why?). In order to obtain an answer to our original question regarding the slopes of the tangent lines at x = 1, describe what you would do with the functions obtained in (a), and carry out this operation.

2007-08-19 03:46:02 · 3 answers · asked by Anonymous

the supply equation for a certain commodity is
x^2 = 10^6p(3p+20), where x units are supplied per month when p in dollars is the price per unit. find the rate of change of supply with respect to the price when the price is $20 and 1 million units are supplied

2007-08-19 03:30:19 · 2 answers · asked by dee j 2

listen this is my project my school is starting on 25 august and i dint finish my project i want your help in this only for some questions which i dint did..if you cant solve these problems on computers solve it on a paper then scan it like me the links are....page 1 -http://i110.photobucket.com/albums/n98/zeeshankm/scan0003.jpg and the questions i want on page are 3.,9.,12.,17.(all-1-7),18, 19, 20, 21, 22, 23, 24, 25-you can get these answers in rd sharma but idont have it so please help and on second page-url- http://i110.photobucket.com/albums/n98/zeeshankm/scan0004.jpg - and the questions i want on page are 26,28,32,33,34,40, thts all i want it in 3 days help me out you r my last hope...i m from class 9th so you can refer some class 9th cbse books like rd sharma..for more details mail me..

2007-08-19 02:24:42 · 2 answers · asked by zeeshu 1

on question (2) the answers to choose from are:
a) 50√5
b) 100√5
c) 10√5
d) 250

2007-08-19 01:57:23 · 10 answers · asked by Anonymous

a sample of radium-226 has a mass of 100mg. find a formula for the mass of radium-226 that remains after t years

2007-08-19 01:47:36 · 5 answers · asked by deadman 2

Prove that cotA+tan2A= cotAsec2 (using LHS=RHS)

2007-08-19 01:18:33 · 7 answers · asked by Stormy Knight 1

cotA+tan2A= cotAsec2A

2007-08-19 00:52:12 · 6 answers · asked by Stormy Knight 1