Question

calcule o valor de x

Answer 1

$a^{2} = b^2+c^2\\a=13\\b=5\\c=x\\\\13^2= 5^2 + x^2 \\169=25+x^2\\x^2 + 25 = 169\\x^2 = 169 - 25 = 144\\x = \sqrt{144}\\\\x = 12$

Answer 2

olhe essa conta  200 vezes 23

200

×23

900

400=1300