Monday

March 30, 2015

March 30, 2015

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]

**Answer this Question**

**Related Questions**

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

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

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

College Math - 5) A landscaper wants to make a small planter and surround it ...

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

Algebra - Algebra Word Problems: 1. The length of the floor of a one-storey ...

Math - A gardenervhas 100 meters of fencing to enclose two adjacent rectangular ...

3rd grade Math - If Beth has 28 feet of trim to use as edging on a rectangular ...

geometry - ye has 44 feet of fencing to enclose a rectangular garden. She wants ...

Lake Arbor Elementary - Marjorie has 28 feet of trim to use as edging on a ...