In the figure above, tan B = 3/4. If BC = 15 and DA = 4, what is the length of DE?

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Official College Board SAT Practice Test 7, Section 4, Question 36
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great video man super helpful! especially that point about always labelling with x, spot on!

emmanuelolowe
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Thank you for your great videos. They help me a lot)

konstantinberg
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tysm for the vid, rlly helpful! keep it up

ragedragon