Mathematics - 20 September 2007

1. 1/7 (x-3) =1/8 (x-2)

2. 1/4 (x-7)= 1/5 (x-8)

3.-(6x+5) - (9x-7) =11 - (5x+1)

2007-09-20 16:57:04 · 6 answers · asked by GO Saints!! 3

Three times 1/3 equals one. 1/3 represented as a decimal is .333333333 etc. So does .99 equal 1?

2007-09-20 16:51:05 · 11 answers · asked by Archimedes 1

i need help on my home work

2007-09-20 16:43:22 · 21 answers · asked by Matt 1

that i completely forget how to do..

it is:

2x+3=2x+8

just.. yeah.

that and this one:

the product of 7 and the quantity of a number plus 2 is 14. Find the number.

2007-09-20 16:35:59 · 15 answers · asked by erica B 1

ha ha i don't know why i'm always so bad at these. anyway, umm here's the problem:

(3*5^X-5) / (27*5^x-3)

how do i solve this for x? i know there's another way...but usually i would just set 27 as a power of 3 and then easily subtract the exponents using the quotient rule. however, this would cancel out the Xs, thus, i am a little confused on how to go about this. i know the right answer is 1/225 thanks to my teacher's key, but HOW? (this is on a quiz review)

2007-09-20 16:34:13 · 2 answers · asked by helloosunshine 3

2007-09-20 16:32:23 · 13 answers · asked by LADY V, 1

the square root of 3? Show work please.

2007-09-20 16:31:50 · 1 answers · asked by ... 2

2007-09-20 16:29:15 · 1 answers · asked by alawrence108 1

a typical jersey cow weighs 150 lb at 3 mos. and 540 at 15 mos. what would be a point slope equation for this, giving the weight of the cow as the function?

2007-09-20 16:28:47 · 2 answers · asked by karlieT 1

iduno how to use a graphing calc nd dunt have one ><

Use a graphing calculator to tell which of these equations has No solution and which has a solution of All Real Numbers:

a) 1/2x - 5 = 2x -20 over 4

b) 3/2x - 2 = 3 [ x/2 - x ]

also....

this is not graphing
but i dunt get how to do it ><
solve plzz 2/3x - 5 = 1/4 ( x - 5 )

2007-09-20 16:22:07 · 6 answers · asked by Anonymous

I know when you want to remove division or multiplication in algebra, every term on the left and right side must be either multiplied or divided. For example: 2x + 12 = 20. Normally, people simplify by subtracting 12 from each side, but even if you don't, it still works by doing x + 12/2 = 20/2, which comes out to x + 6 = 10, take away 6 from both sides, and you get 4. However, this doesn't seem to work with squares or square-roots. For example: x^2 + 4 = 20. x + sqrt(4) = sqrt(20) doesn't work. If you simplify beforehand and do x^2 = 16, you get the right answer (4). Why doesn't my first example work? Is there some sort of special rule?

2007-09-20 16:18:41 · 8 answers · asked by Anonymous

If I have a point and its image, is that enough to determine whether the image was found using a translation, reflection, rotation, or glide reflection?”

2007-09-20 16:12:24 · 1 answers · asked by Anonymous

2007-09-20 16:10:25 · 8 answers · asked by texan3715 1

-35x – 28 + 35x -5 = x – 7
-35x + 35x – 28 – 5 = x – 7
–7(5x + 4) + 5(7x – 1) = x – 7
-35x + 35x -33 + 7 = x – 7 + 7
-33 + 7 = x
-36 = x

2007-09-20 16:08:19 · 12 answers · asked by Anonymous

i need some help..

3x=5y=7

2x=-3y+10

1+7y=5x-2

and can you tell me how to do it?

2007-09-20 15:58:25 · 5 answers · asked by slugbug! 1

2007-09-20 15:57:55 · 8 answers · asked by LADY V, 1

There are 132 more silver dollars than 50-cent pieces . THE ratio of silver dollers to 50-cent pieces is 5:2. How many of each type of coin are there?

2007-09-20 15:56:50 · 1 answers · asked by J.D 1

please show work thanks.

2007-09-20 15:51:53 · 4 answers · asked by Dark Fire 2

Let's continue with the normal frivolities......

At one point in my life I was an expert professional confectioner and cake decorator, so does that mean I was a master-baker?

2007-09-20 15:51:23 · 20 answers · asked by Anonymous

what is the circumference of a circle if the radius is 19 in?

2007-09-20 15:49:56 · 4 answers · asked by Anonymous

4 answers

2007-09-20 15:46:14 · 5 answers · asked by student 3

Can you solve this math problem its in the system of linear Equations: Substitution: Elimination section.

In Kyotoshi, Japan, the cost of three bowls of noodles and two cartons of fresh milk is 2153 yen. Three cartons of fresh milk cost 89 yen more than one bowl of noodles. What is the cost of a bowl of noodles? A carton of fresh milk?

2007-09-20 15:44:24 · 10 answers · asked by w s 3

are there any mathematical definitions for any number n being an interger. You know, sort of like the definition of divisibility: a is divisible by 5 if and only if a=5(b) where b is some integer

2007-09-20 15:40:34 · 2 answers · asked by In Testimony Whereof 3

2007-09-20 15:31:58 · 10 answers · asked by LADY V, 1

Maria and cindy both arrived early for work. Cindy arrived 23 1/2 minutes earlier than Maria. If the total number of minutes that they were early was 38, find how many minutes each girl arrived ahead of time.

2007-09-20 15:29:32 · 3 answers · asked by dzyldarchitects 2

I am stumbed assisting my son with this math problem:

Three missionaries and three cannibals wish to cross a river using a single boat that will hold only two people. If at any time the cannibals outnumber the missionaries, those missionaries will be eaten. How can the crossing be safely made?

2007-09-20 15:25:44 · 2 answers · asked by ruby1976bx 1

1. 8n-10-12n=-18
2. 2/3(x+1)=10

2007-09-20 15:21:07 · 5 answers · asked by Anonymous

(3.8 x 10 to the 5th power) - (2.1 x 10 to the 6th power)

help.

i have no clue how to do this one.
b/c i know the exponents have to be the same..
ugh. help.

2007-09-20 15:18:06 · 4 answers · asked by Emily 2

(4.2 x 10 to the -8) - (2.3 x 10 to the -8)


-8 (negative eight) is the power so it is the power to negative 8

is the answer 1.9 x 10 to the negative eighth?

2007-09-20 15:16:40 · 3 answers · asked by Emily 2

2007-09-20 15:14:45 · 4 answers · asked by TERI H 1