Monday

April 21, 2014

April 21, 2014

Posted by **Laura** on Thursday, May 23, 2013 at 12:40am.

- Pre Calculas -
**Steve**, Thursday, May 23, 2013 at 10:54amx+y <= 60

xy = 120

so,

x + 120/x <= 60

x^2 + 120 <= 60x

x^2 - 60x + 120 <= 0

The two roots of this equation are

x = [60±√(3600-480)]/2 = 30±2√195

since this is a parabola which open up, it is negative between the roots. so,

x ∊ [30-2√195,30+2√195]

**Related Questions**

Pre-Calculus - A gardener has 100' of edging. She wants to use it to enclose a ...

Pre-Calculus - A gardener has 72' of edging. She wants to use it to enclose a ...

math - A gardener measures the tallest of his prize-winning sunflowers and ...

Geometry - A gardener is installing a circular garden. The radius of the circle ...

Calculus - A gardener has a rectangular plot of land bordered on one side by a ...

Math - A gardener is installing a circular garden. The radius of the circle 28 ...

Calculus - You are creating a rectangular garden and want to surround it with ...

math - A gardener measures the tallest of his prize-winning sunflowers and ...

Algebra - 28. A gardener measures the tallest of his prize-winning sunflowers ...

English - 1. I lied and told him that you were a fine gardener. 2. I lied and I ...