Thursday

September 18, 2014

September 18, 2014

Posted by **Kate** on Sunday, February 17, 2008 at 1:10pm.

- math -
**drwls**, Sunday, February 17, 2008 at 1:30pmLet x be the distance of the foot from the wall. Then use the Pythagorean theorem.

x^2 + (x+3)^2 = 15^2 = 225

2x^2 +6x -216 = 0

x^2 +3x -108 = 0

That factors easily. (Think: 9x12 = 108)Take the positive root.

**Answer this Question**

**Related Questions**

Calculus - related rates: a ladder, 12 feet long, is leaning against a wall. if ...

Calculus - a 5m ladder rests against a vertical wall. The top of the ladder ...

algebra - A ladder is resting against a wall. The top of the ladder touches the ...

Math - A 13 foot ladder is leaning against a vertical wall. The distance from ...

algebra - a 17-foot ladder leans against a wall. if the ladder is 8 feet from ...

math - A ladder 10 m long rests on horizontal ground and leans against a ...

Calculus - A 10 foot ladder leans against a 20 foot wall. Someone begins pushing...

Algebra 1 - A ladder is resting against a wall. The top of the ladder touches ...

Calculus - A 17 foot ladder is leaning against a wall. The bottom of the ladder...

Calculus - a 16 foot ladder is leaning against a building. the bottom of the ...