Posted by **alyssa** on Friday, December 25, 2009 at 10:45am.

Scott, Arif, and Diane run a small delivery company. For thier business, they use licensed two-way radios with a 20 km range. Scott is at their office which they have marked as the origin on their map of the town. Arif is dropping off a package at (-8, 16) while Diane is making a pick up at )4,20)

a) Find an equation that desrcibes the boundry of this area

- MATH GRADE 10**** -
**drwls**, Friday, December 25, 2009 at 4:32pm
If "the area" is a triangle, it would take three equations to define the boundary. I don't see what the 20 km range of the radios has to do with that boundary.

If what they want is the equation of the boundary of radio reception, it is the circle

x^2 + y^2 = 20^2 = 400

Diane is outside the boundary and Arif is inside it.

- MATH GRADE 10**** -
**hai**, Wednesday, January 6, 2010 at 11:13pm
does anybody knows how to solve for x+2y is

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