The multiplicative inverse of $\dfrac{-3}{7}$ is

1. $\dfrac{-7}{3}$

2. $\dfrac{3}{7}$

3. $\dfrac{4}{7}$

4. $\dfrac{7}{3}$

The sum of $-\dfrac{1}{3}$ and its multiplicative inverse is

1. 0

2. -3

3. $-1\dfrac{2}{3}$

4. $-3\dfrac{1}{3}$

Which of the following rational numbers is equivalent to $\dfrac{-2}{7}$ ?

1. $\dfrac{-14}{21}$

2. $\dfrac{-8}{14}$

3. $\dfrac{-14}{49}$

4. $\dfrac{-6}{28}$

If $3\dfrac{3}{4}$ m of cloth is required for one suit, then how many suits can be prepared from 30 m of cloth?

1. 4
2. 5
3. 8
4. 9