2 years ago

NEED HELP FRERE BRAINLIST

1 answer:

4 0

Answer:

7.5

Step-by-step explanation:

$a^2+b^2=c^2\\x^2+5^2=9^2\\x^2+25=81\\x^2=56\\\sqrt{x^2} =\sqrt{56} \\x=7.5$

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