Insert ∈ or ∉ in each blank to make the resulting statement true. ∅ ____ ∅

Multiply or divide as indicated. Write answers in lowest terms as needed. $\frac{6}{11}÷\frac{5}{4}$

Find each sum or difference. -6 - 5

Multiply or divide as indicated. Write answers in lowest terms as needed. $\frac{7}{5}÷\frac{3}{10}$

Determine whether each statement is true or false. 6 ∈ {2, 5, 8, 9}