Mathematics - 3 July 2007

Can someone explain algebra to me?

2007-07-03 23:46:47 · 12 answers · asked by polluxgirl14 2

2007-07-03 23:42:49 · 18 answers · asked by Anonymous

2007-07-03 23:36:49 · 10 answers · asked by Poetry 1

The ______ system is a system used to find the position of a point on a ______ plane based on 2 number lines that intersect at right angles.

The clue: the answer to fill the blank is both the same answer n it has 8 letters which ends with the letter N.

2007-07-03 22:56:08 · 5 answers · asked by ♥JO the KrYpToN◄ 5

2007-07-03 22:51:10 · 2 answers · asked by Anonymous

I'm having a brainfreeze! I've forgotten how to work out the percentage reduction between two prices. The starting price is 4450 and the reduced price is 3575, so what's the percentage discount? How do you work this out? The main problem I have is that I need to calculate a discounted price at the same percentage from a different price.

Thank god it's not Monday or I'd have no chance!

Thanks!

2007-07-03 21:37:41 · 9 answers · asked by Anonymous

1. Using exact values, fine the numerical value of :
a. sin 30* cos 240* + sin 210* sin 300*
b. tan 225* + tan (-45*)

2. Express each of the following as the same function of a positive acute angle:
a. cos 112* 33'
b. tan 310*
c. cot 138* 15' 10"
d. sin (-140*)

3. Express eash as a function of 0:
a. sin (270* + 0)
b. tan 310*
c. tan (810* + 0)
d. sin (0-180*)

4. find the value of:
a. log sin 62* 22' 33"
b. log cot 28* 13' 17"
c. log cos 125* 15' 23"
d. log tan 78* 45' 50"

5. find the acute angle A, to the nearest second when:
a. log cos A = 9.12575
b. log sin A = 9.91655
c. log cot A = 0.11975
d. log tan A = 0.06323

2007-07-03 21:31:58 · 4 answers · asked by . 2

A piece of carpet is 68.58cm wide. How many stripes of such carpet will it take to cover the width of the room that is 5.5m wide.

2007-07-03 21:21:24 · 6 answers · asked by Laurize 1

I'm trying to integrate the expression:

∫ -sin ²(t) / cos(t) dt

However, no matter how hard I bang my head against this problem, I just can't seem to solve it. I know the answer, which is -sec(t) + cos(t) (in this case, forget the C term), but I haven't a clue how to get there.

2007-07-03 20:41:06 · 5 answers · asked by Changra 2

I need to extract an expression for one of the constants 'k' or 'c' in terms of 'X1', 'Y1', 'X2', and 'Y2', then the other constant should follow easily.

Equations are:

Y1 = k * ln(X1 + c) and Y2 = k * ln (X2 + c)

I got as far as this then got stuck:

e^(Y1/k) - e^(Y2/k) = X1 - X2

Can anyone help......please.

2007-07-03 20:13:39 · 2 answers · asked by Anonymous

2007-07-03 20:13:05 · 7 answers · asked by da S 1

Factor completely: 2x2 - 2x - 12.

2007-07-03 20:10:35 · 5 answers · asked by Anonymous

let * be defined on the set of complex numbers by a*b = labl. determine whether the binary operation * gives a group structure on the given set.

2007-07-03 20:09:52 · 5 answers · asked by la 1

The secretary spent her 35 hour work week in this manner: 1/5 of her time sorting mail, 1/7 of her time filing letters, and ½ of her time typing. The rest of her time she acted as a receptionist. The percentage of her time spent as a receptionist during the week was most nearly

2007-07-03 19:45:51 · 5 answers · asked by Anonymous

8 - 5(4 - 3x) = 2(4 - x) - 8x
( a + 2) ( a^2 -3a + 7)
simplify : ( 3x^2 y) ( -2xy)^3
solve: square root of 4x - 2 = square root of 3x + 9
Is square root of x^2 - y^2 = x - y ?

2007-07-03 18:56:22 · 8 answers · asked by bettylee 1

2007-07-03 18:16:22 · 8 answers · asked by Mohammad H 1

simplify the expression
( 3^x +3^-x)^2 - (3^x - 3^-x)^2

the answer is 4 but i need to know the steps of how to do it so please show detail

2007-07-03 18:01:27 · 10 answers · asked by fhsdjfsd 2

A chemist has 84 ounces of a solution. He pours the solution into test tubes. Each test tube holds 2/3 oz. How many test tubes can he fill?

2007-07-03 17:52:11 · 10 answers · asked by fondagoodman1 2

2007-07-03 17:50:23 · 13 answers · asked by Bill W 【ツ】 6

the 6 digit running number includes zero

2007-07-03 16:13:05 · 3 answers · asked by leey 1

how much money is in 35,000 lb or 15875.733 kg in $100 bills?

2007-07-03 16:10:40 · 6 answers · asked by Nicholas T 1

1. The present ages of a husband and wife are in the ratio of seven to six and five years ago the ratio was six to five. Find their ages now.


2. The numerator and the denominator of a fraction are thirteen and fifty, respectively. When a certain number is added to this numerator and subtracted from this denominator, the resulting fraction has a numerator to denominator ratio of two to one. Find the number.

2007-07-03 16:04:48 · 5 answers · asked by Anonymous

PLEASE TELL ME THE ANSWER AND HOW YOU DID THE WORK!!

THANK YOU!!!!!!!!!

2007-07-03 15:53:28 · 8 answers · asked by yukixvk479 1

Perform the indicated operations. write the answer in standard form a + Bi.

8i/1+i




find the power of i .

i ^ 29

2007-07-03 15:42:16 · 6 answers · asked by Anonymous

PLEASE TELL ME THE ANSWER AND HOW YOU DID THE WORK.

THANK YOU!!!

2007-07-03 15:35:17 · 7 answers · asked by sarah M 1

If one-half of one integer is subtracted from three-fifths of the
next consecutive integer, the difference is 3. What are the two integers?
Can you please show me the work so I can do this next time and understand it. Thanks!!!!

2007-07-03 14:47:45 · 14 answers · asked by Anonymous

Solve the system of equations by the addition method. If the system does not have a single ordered pair as a solution, state whether the system is inconsistent or dependent.

-5x + 7y = -40
-2x + 4y = -16
(8, 0)
No solution, inconsistent
(7, 1)
(8, 1)

2007-07-03 14:34:52 · 3 answers · asked by alw0322 1

http://i181.photobucket.com/albums/x85/ctti_3/untitled-15.jpg

2007-07-03 14:32:58 · 4 answers · asked by Kelly 1

Solve the system of equations by the addition method. If the system does not have a single ordered pair as a solution, state whether the system is inconsistent or dependent.

x + 3y = 6
9x + 4y = 8
(-2, 0)
(1, 1)
No solution, inconsistent
(0, 2)

2007-07-03 14:24:32 · 7 answers · asked by Mark W 2

Solve the system by substitution.

x - 6y = -1
9x - 7y = 38
(4, 2)
(-5, 2)
No solution
(5, 1)

2007-07-03 14:23:47 · 9 answers · asked by Mark W 2