Find a number 't' such that the line in the xy-plane containing the points (-7,t) and (20,7) is perpendicular to the line y = -5x + 999 We're solving for 't' Thank you.
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Originally Posted by jonathanraxa Find a number 't' such that the line in the xy-plane containing the points (-7,t) and (20,7) is perpendicular to the line y = -5x + 999 Solve $\displaystyle \left(\frac{-7-20}{t-7}\right)=-5$ for $\displaystyle t$.
Last edited by Plato; May 8th 2012 at 05:10 PM.
Originally Posted by jonathanraxa Find a number 't' such that the line in the xy-plane containing the points (-7,t) and (20,7) is perpendicular to the line y = -5x + 999 We're solving for 't' perpendicular slopes are opposite reciprocals ... $\displaystyle \frac{7-t}{20-(-7)} = \frac{1}{5}$
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