Sunday

March 29, 2015

March 29, 2015

Posted by **sabrina** on Tuesday, June 3, 2008 at 1:12pm.

- algebra -
**Reiny**, Tuesday, June 3, 2008 at 1:20pmfirst triangle : x by 4x

second triangle : 4x+5 by x+2

area of first = x(4x)

area of second = (4x+5)(x+2)

so (4x+5)(x+2) - x(4x) = 270

solve for x, you should get x=20

(check: original is 20 by 80, Area = 1600

second is 22 by 85, Area = 1870)

difference in area = 1870-1600 = 270

**Answer this Question**

**Related Questions**

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

math - A rectangle is 4 times as long as it is wide. A 2nd rectangle is ...

Algebra 1 - A right triangle has a base measuring 5 centimeters & a height of 12...

geometry - A rectangle is 3.2 centimeters wide and 8 centimeterslong.A similar ...

Math - The length of a rectangle is 5 centimeters less than three times it's ...

7th grade mathSuppose - Suppose rectangles X and Y are similar. The dimensions ...

math - The area of rectangle ACED is 80 square centimeters, and the area of ...

math - A rectangle is 3 times as long as it is wide, it's area is 108 square ...

Word Problem - The length and width of a rectangle are to each other as 4 is to ...

Geometry - Complete the indirect proof. Given: Rectangle JKLM has an area of 36 ...