Solve for y A. 8 B. 3 √(7) C. 4 √(7) D. 12

asked Nov 1, 2019 52.3k views

3 votes

Solve for y

A. 8

B.

3 √(7)

D. 12

7.8k points

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1 vote

Triangle ADC and triangle BCD are similar, therefore the sides are in proportion:

(y)/(9)=(7)/(y)

cross multiply

$y^2=9\cdot7\to y=√(9\cdot7)\\\\y=\sqrt9\cdot\sqrt7\\\\y=3\sqrt7$

Answer: B. 3√7

Neil Knight answered Nov 6, 2019

7.3k points

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