Which of the following expressions will yield o negative number? a.) \( (-20)(-5) \) b.) \( -18 \div(-2) \) c.) \( (-1)(9) \) d.) \( (6)(8) \)

Bir damacanada bulunan 18 litre suyun \( \frac{5}{6} \) i kullanımıştır. Kalan su \( \frac{3}{4} \) litrelik şi- şelere dolduruluyor. Buna göre, bu iş için kaç tane şişe kul- lanıır? \( \begin{array}{llll}\text { A) } 3 & \text { B) } 4 & \text { C) } 5 & \text { D) } 6\end{array} \)

Question 10 There are 50 teachers in a school. This is \( \frac{1}{16} \) of the total number of people in the school. Work out the total number of people in the school.

\( \frac{6}{\frac{2}{5}}-\frac{\frac{6}{5}}{5} \) Yukanda verilen islemin sonucu kaçır? \( \begin{array}{llll}\text { A) } \frac{72}{5} & \text { B) } \frac{-72}{5} & \text { C) } \frac{5}{72} & \text { D) } \frac{-5}{72}\end{array} \)

Find the 7 th value in the arithmetic sequence described by the explicit formula \( A_{n}=2.5+(n-1) 4 \). (1 point) \( A_{7}=\square \)

12. \( \frac{6}{\frac{2}{5}}-\frac{\frac{6}{2}}{5} \) Yukanda verilen işlemin sonucu kaçtır? \( \begin{array}{llll}\text { A) } \frac{72}{5} & \text { B) } \frac{-72}{5} & \text { C) } \frac{5}{72} & \text { D) } \frac{-5}{72}\end{array} \)