Wednesday

August 20, 2014

August 20, 2014

Posted by **PLEASE HELP** on Monday, October 17, 2011 at 6:45pm.

- MATH Middle School -
**Reiny**, Monday, October 17, 2011 at 6:55pmfirst:

length --- x

width ----y

2nd:

length --- x+12

width --- y-5

xy + (x+12)(y-5) = 360

xy + xy + 12y - 5x - 60 = 360

2xy + 12y - 5x = 420

difference in perimeter = 2x + 2y - 2(x+12) - 2(y-5)

= 2x + 2y -2x - 24 - 2y +10

= -14

The fact that their areas total 360 cm^2 appears to not even enter the picture.

- Frank N. Osborne Middle School -
**Tyler**, Saturday, August 25, 2012 at 6:07pm14 cm

**Related Questions**

math - a rectangle is 4 times as long as it is wide. a second rectangle is 5 ...

math - The length of a rectangle is 2 times its width and its perimeter is 42 cm...

math - Which two rectangles have an area of 72 square centimeters? A. length 12...

math - A RECTANGLE HAS A WIDTH OF X CENTIMETERS AND A PERIMETER OF 8X ...

MATH - A RECTANGLE HAS A WIDTH OF X CENTIMETERS AND A PERIMETER OF 8X ...

Math - All these are either rectangles or squares 1.Rectangle. 5 is length and ...

algebra - a rectangle is 4 times as long as it is wide. a second triangle is 5 ...

Math check please - 2 rectangles have equal areas determine the area of each ...

Math ( Algebra 1 ) - Two rectangles have the same width. The length of one is 2 ...

math - Two rectangles have the same width. The length of one is 2 feet longer ...