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Mathematics 15 Online
OpenStudy (anonymous):

An 18-foot long ladder is leaning up against a very tall wall. the bottom of the ladder is 8ft away from the base of the wall. Approximately how high up the wall does the ladder reach?

sam (.sam.):

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sam (.sam.):

Use Pythagoras theorem \[\sqrt{18^2-8^2}\]

OpenStudy (anonymous):

thx Consider the line given: y=1/2x-3/4. What is the slope of a line: a)parallel to it? and b) perpendicular to it?

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