12192 divided by 48 = ?

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The sum of two numbers is 12 and their difference is 18 what are the two numbers

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap

What rule describes a dilation with a scale factor of 4 and the center of dilation at the origin?