If bc = 4.5, cd = 7.7, and ad = 16.7, find ab to the nearest tenth.

a. 2.1

b. 28.6

c. 9.8

d. 2.2

ANSWER



EXPLANATION

Triangle ABC is similar to triangle ADC,
therefore the corresponding sides sides are in the same proportion.



We substitute the values to obtain,



We multiply through by


to get,



This simplifies to give us,



To the nearest tenth,



The correct answer is C

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