Mathematics - 3 August 2007

Hi
can someone check is my problem is right

Q. If four times julio's age is decreased by 50, the result is twice Julio's age. How old is Julio?
A.
4x- 50 = 2x
-4x -4x

-50= -2x
Divide -50/-2
X=25

now that I fond x=25 I multiply by 2
2(25)=50

Thank you

2007-08-03 09:45:32 · 6 answers · asked by k 1

and how do you do it?

2007-08-03 09:43:15 · 13 answers · asked by KK 2

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I need to know how to figure this out. I need a problem written that will compute 1 years earnings (100,000) x 5% = and then ADD that to the next year, FOR EACH YEAR for 45 years for a lifetime earnings.
This is what I have each year is 100000 x 5%=100500 addd to next year 100,500+100,500=201,000 plus 100,500= 301,500+100,500= and so on for 45 years

Is there an easy way to do this without adding each and every year together? Please help me ASAP!!!

Thank you very much!!

2007-08-03 09:19:42 · 2 answers · asked by Tree 2

Use Green's Theorem to evaluate the line integral

ò P(x, y) dx+ Q(x, y) dy
C

ò = integral

where C is the path from (0, 0) to (1, 0) along y= 0; then from (1, 0) to (1, 1) along x = 1; then from (1, 1) to (0, 0) along y= x^1/2, given that P(x, y) = y^5, and
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a. 1
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or is it none of these?

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I think i need 5 sheets of 2m*1m but im not sure im confused because the area of each plate (12*15 = 180cm2) but when i try and work out from 180cm2 i get big numbers and get confused! please help!

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(4√5-3√2)(2√5+4√2),

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is this the correct answer?

2007-08-03 07:44:19 · 8 answers · asked by Anonymous

an equilateral triangle with sides 10cm is divided into two regions by a line segment parallel to one of the sides.

a) if the regions have equal areas, determine the length of the line segment.

b) create two other problems that are suggested by this one. then solve each problem.

okay so i figured the height of the big triangle to be 8.7cm. and the area is 43cm squared. This means the area of the small triangle should be 21.7cm squared.

im stuck here... any help is appreciated. thanx alot . for the second part i have no idea so if u can help thanx :)

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2007-08-03 07:37:08 · 7 answers · asked by micheal t 1

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2007-08-03 07:33:32 · 4 answers · asked by Anonymous

I'm stuck on this math problem can u help I'm bad with quadratic formula

use the quadratic formula to solve this equation

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Simplify each complex fraction.

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-----------------
( 3) / (5y) - 8

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2007-08-03 07:09:00 · 7 answers · asked by rock it ! 1

2007-08-03 07:07:13 · 10 answers · asked by .♥Blessed.and.Highly.favored♥. 2

the projected rate of sales of zfones in the UK will initiallly be 50000 per month. it is projected that sales will double every two months as production and distribution improve. the product will be launched on 1 august 2007. assuming that the market grows as projected calculate...

1) the rate of sales at the end of december 2007

2) the date when sales reach a rate of 1500000 per month

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r^2+3r=8

how to you go about solving this?

2007-08-03 06:41:32 · 4 answers · asked by Anonymous