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If y varies directly as x, and y is 180 when x is n and y is n when x is 5, what is the value of n?
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Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?

How do i find the missing angle measure in a polygon