### Home > ACC7 > Chapter 7 Unit 8 > Lesson CC3: 7.1.2 > Problem7-21

7-21.

Evaluate each expression below for a when $a=\frac{2}{3}$, if possible.

1. $24a$

Multiply $24$ by $2$, then divide by $3$.

$\frac{24}{1} \cdot \frac{2}{3} = \frac{48}{3} = 16$

1. $3a$

Use the same method as part (a).

1. $\frac{a}{0}$

Dividing by $0=$ undefined.

1. $\frac{0}{a}$

$0$