Question

AIUDA PLZ(っ °Д °;)っ ES PARA UN EXAMEN!!

Answer 1

Explicación paso a paso:

$c = 5.4 \times 3.1 - ( 0.4 {)}^{2} + 1.5 \div 0.5 \\ 5.4 \times 3.1 - 0.16 + 1.5 \div 0.5 \\ 16.74 - 0.16 + 3 \\ 16.58 + 3 \\ 19.58$

$c + 50 \\ 19.58 + 50 \\ 69.58$

espero te sirva