Question

por favor alguém me ajuda com essas contas

Answer 1

$( \frac{5}{4} )^{-2} + \frac{ \sqrt{16} }{25} =\frac{ 5^{-2} }{ 4^{-2} } + \frac{ 4 }{25} = \frac{ \frac{1}{ 5^{2} } }{ \frac{1}{ 4^{2} } }+ \frac{ 4 }{25} = \frac{1}{25}* \frac{16}{1}+ \frac{ 4 }{25} = \frac{16}{25}+ \frac{ 4 }{25} = \frac{20:5}{25:5}$$\frac{4}{5}$

$\sqrt{144}- \sqrt{21}+ 2^{o}=12-11+1=2$

$\sqrt{169}+ (\sqrt{121})^{o} + (\sqrt{100} )^{1}=13+ (11)^{0}+10=13+1+10=24$