Wednesday

August 20, 2014

August 20, 2014

Posted by **Andy** on Wednesday, July 15, 2009 at 11:08pm.

thanks

- math -
**Reiny**, Thursday, July 16, 2009 at 8:49amlet the width be x and the length be y

we know xy = 6 and

x^2 + y^2 = (2√5)^2 = 20

Perimeter = 2(x+y)

from algebra we know

(x+y)^2 = x^ + 2xy + y^2

but we know the values on the right side,

so

(x+y)^2 = 20 + 6 = 26

then x+y = √26

and the perimeter is 2√26

- math -
**David**, Wednesday, July 29, 2009 at 8:33amlet the width be x and the length be y

we know xy = 6 and

x^2 + y^2 = (25)^2 = 20

Perimeter = 2(x+y)

from algebra we know

(x+y)^2 = x^ + 2xy + y^2

but we know the values on the right side,

so

(x+y)^2 = 20 +12=32

then x+y = 32

and the perimeter is 232

- math -
**David**, Wednesday, July 29, 2009 at 8:38amWhy is math so hard?

- math -

**Related Questions**

MATH - the area of a certain rectangle is 288yd squared. the perimeter is 68yd. ...

math - the area of a certain rectangle is 288 yd squared. the perimeter is 68 ...

Math - The length of a rectangle is twice its width if the area of the rectangle...

Math - The first question is this: Helen designs a rectangle with an area of 225...

math 9th grade - the perimeter of a rectangle is 56 inches> the width of the ...

area, perimeter - the perimeter of rectangle y is equal to its area. rectangle z...

Math - In the figure below, the diagonal line divides the rectangle into halves ...

maths - the length of a rectangle is 3 less than 5 times its width. Write a ...

math - a rectangle with measurements of length of 11, width of 4, diagonal of 11...

Math - The area of a rectangle is shown below The area of the rectangle is 56 ...