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Gnoma [55]
3 years ago
8

Help with geometry........

Mathematics
1 answer:
hammer [34]3 years ago
8 0

Answer:

DC=2.4

Step-by-step explanation:

let DC=x

AB=4-x

\frac{3}{4.5} =\frac{4-x}{x} =\frac{4}{x} -\frac{x}{x} =\frac{4}{x} -1\\\frac{4}{x} =\frac{30}{45} +1=\frac{30+45}{45} =\frac{75}{45} =\frac{5}{3} \\5x=4*3=12\\x=12/5=2.4

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