Monday

November 24, 2014

November 24, 2014

Posted by **lee** on Thursday, January 24, 2013 at 7:58pm.

can someone please explain?

- algabre -
**Misha**, Wednesday, March 20, 2013 at 6:29pm(22.5/r-6)+(22.5/r+6)=9

Multiply the equation by r^2-36.

Resulting equation: 9r^2-45r-324=0

Simplify: r^2-5r-36=0

Factor: (r-9)(r+4)

Answer: rate of ferry= 9mph

**Answer this Question**

**Related Questions**

algebra - please explain the step for this I have no idea. the speed of the ...

algebra - please explain the step for this I have no idea. the speed of the ...

math - A ferry boat operator is required to drive directly to the opposite side ...

trig/ vectors - Points C and D are directly across from each other on opposite ...

physics - A ferry is crossing a river. The ferry is headed due north with a ...

Physics - A ferry is crossing a river. The ferry is headed due north with a ...

Physics - A ferry is crossing a river. The ferry is headed due north with a ...

physics - A ferry is crossing a river. If the ferry is headed due North with ...

physics - A boat crosses a river, which is 60 meters wide in 15 seconds. Upon ...

Physics - A boater wants to head straight across a river that has a current of ...