MHB Find the length x if the shaded area is 1200 cm^2

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To find the length x when the shaded area is 1200 cm², it's essential to have more information about the shape and dimensions of the area. Providing a diagram or additional details about the geometry involved would greatly aid in solving the problem. Many participants emphasize the importance of clear communication and visual aids in mathematical discussions. Without these specifics, it's challenging to arrive at a solution. Clarity in problem presentation is crucial for effective problem-solving.
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Find the length x if the shaded area is 1200 cm^2
 
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Figure?
 
It would help if we knew something about the shaded area!
 
It's amazing how many people don't understand the concept of posting or sketching a diagram.

-Dan
 
Thread 'erroneously finding discrepancy in transpose rule'

Thread 'erroneously finding discrepancy in transpose rule'

Obviously, there is something elementary I am missing here. To form the transpose of a matrix, one exchanges rows and columns, so the transpose of a scalar, considered as (or isomorphic to) a one-entry matrix, should stay the same, including if the scalar is a complex number. On the other hand, in the isomorphism between the complex plane and the real plane, a complex number a+bi corresponds to a matrix in the real plane; taking the transpose we get which then corresponds to a-bi...
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