Question

Me Ajuden Por Favor!." 1Resolva as Expressões.: A, (2,65-4):9= b, 1/3.(2/3:1/7):9= C, 5x(3x4,1-7/2)=

Answer 1

  a)
             $(2,65-4):9 =(-1,35):9=-0,15$

 b)
             $\frac{1}{3} .( \frac{2}{3} : \frac{1}{7} ):9= \frac{1}{3} .\frac{2}{3} . \frac{7}{1} .\frac{1}{9}= \frac{1.2.7.1}{3.3.1.9} = \frac{14}{81}$

 c)
             $5x(3x4,1- \frac{7}{2} )=5x(12,3- \frac{7}{2} )= 5x(\frac{123}{10}- \frac{35}{10} )= \frac{5}{1} x \frac{88}{10} = \frac{88}{2} =44$