Question

plz help havea nice day / night

Answer 1

$generally \: question \\ \\ which \: of \: the \: following \: represents \: the \: muliplicative \: inverse \: of \: - 90? \\ \\ \: \: \: \: \: \: \: (a) \: \: - ( - 90) \\( b) \: \: - \frac{1}{90} \\ (c) \: \: 90 \: \: \: \: \: \: \\ (d) \: \: - 90 \\ \\ ans. \: \: - \frac{1}{90} \\ because \: in \: multiplicative \: inverse \: sign \: is \: not \: change \: \\ only \: numbers \: change \: in \: \frac{p}{q} form$