Question

answer me please
with explanation
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Answer 1

Answer:

y=18 cm

Step-by-step explanation:

In ΔACD,

(AD)²=(AC)²+(CD)²

(25)²=(AC)²+(7)²

625=(AC)²+49

(AC)²=625-49

(AC)²=576

AC=√576

AC=14 cm

In ΔABC,

(AB)²=(AC)²+(BC)²

(30)²=(14)²+(BC)²

900=576+(BC)²

(BC)²=900-576

(BC)²=324

BC=√324

BC=18 cm

y=18 cm