Question

me ajuda ai nessas duas​ prfv galera

Answer 1

Resposta:

4)

11/77 - [ 8/36 : 7/72 ]

= 1/7 - [ 8/36 * 72/7 ]

=1/7 -[ 2/9 * 72/7]

=1/7 - [ 2*8/7] = 1/7 -16/7 =-15/7

5)

a=0,7272.....

100a =72,7272...

100a-a =72

99a=72

a=72/99