Thursday

July 24, 2014

July 24, 2014

Posted by **Anonymous** on Friday, October 28, 2011 at 4:40pm.

- geometry -
**Steve**, Friday, October 28, 2011 at 5:41pm2(x+y)=42

x+y=21

xy=54

x + 54/x = 21

x^2 - 21x + 54 = 0

(x-18)(x-3) = 0

x=18 y=3

or

x=3,y=18

Either way, the rectangle is 3x18

**Related Questions**

geometry - The width of a rectangle is 6 cm less than its length. If the area of...

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

MATH0098 - The perimeter of a rectangle is 58yd , and the area of the rectangle ...

Geometry - The perimeter of a rectangle is 76 feet. If the width is doubled and ...

Math - The perimeter of rectangle Z is equal to its area.Rectangle Y has the ...

Pre-Algebra - A rectange has dimensions of 1 and 6. Another rectangle was drawn ...

Mathematics-please help quick!! - The lenght of a rectangle is 10cm greater than...

Mathematics-please help quick!! - The lenght of a rectangle is 10cm greater than...

math - the length of a rectangle is 5 ft more than twice the width. a)if x ...

grade 3 math - 1) what is the greates perimeter of a rectangle with an area of ...