Posted by **monique** on Sunday, March 25, 2012 at 9:47pm.

two perpendicular lines with the equations y=1/3x+9 and y=mx-3 contain the consecutive sides of a rectangle. What is the value of mx in the 2nd linear question.

- Geometry -
**Reiny**, Sunday, March 25, 2012 at 10:10pm
I answered this question for you at

http://www.jiskha.com/display.cgi?id=1332714932

Did you not look back ?

remember that if lines are perpendicular, then their slopes must be negative reciprocals of each other,

So, if the first has a slope of (1/3),

the second must have a slope of -3

- Geometry -
**Keyosha**, Monday, December 17, 2012 at 8:24pm
A cylinder holds 100 cubic centimeters of water. If you triple the radius of the cylinder but keep the height the same, how much water would you need to fill the new cylinder? V= 3.14r^2h

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