Question

Solve $(-2^{-1}-1^{-1})÷(4^{-1}+6^{-1})$

• A. $3.6$
• B. $-3.6$
• C. $-0.625$
• D. $0.625$

Answer 1

The correct option is B $-3.6$

$\left(\right(\frac{-1}{2})-1)÷\left(\right(\frac{1}{4})+(\frac{1}{6}\left)\right)=\left(\right(\frac{-1-2}{2})÷(\frac{3+2}{12}\left)\right)=\left(\frac{-3}{2}\right)÷\left(\frac{5}{12}\right)=\left(\frac{-3}{2}\right)\times \left(\frac{12}{5}\right)=\left(\frac{-18}{5}\right)=-3.6$