Math

Let ABCD be a parallelogram. Extend line BC past B to F, and let E be the intersection of lines AB and DF. If the areas of triangles BEF and ADE are 1 and 9, respectively, find the area of parallelogram ABCD.

I have no idea!!

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1. the desks in a classroom can be set up in rows of 2,4, or 10 with no desks leftover. what is the least number of desks that could be in the classroom.

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2. Stop cheating!

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posted by AoPS
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posted by bob

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