The problem asks us to evaluate the following expressions given $a=3$, $b=5$, $c=6$, and $r=30$.

1. Problem Description

The problem asks us to evaluate the following expressions given $a=3$, $b=5$, $c=6$, and $r=30$.

2. $15-c$

3. $\frac{18}{c}$

4. $11b$

5. $a-2$

6. $\frac{c}{a}$

7. $\frac{r}{a}$

2. Solution Steps

2. $15-c = 15 - 6 = 9$

3. $\frac{18}{c} = \frac{18}{6} = 3$

4. $11b = 11 \times 5 = 55$

5. $a-2 = 3-2 = 1$

6. $\frac{c}{a} = \frac{6}{3} = 2$

7. $\frac{r}{a} = \frac{30}{3} = 10$

3. Final Answer

2. 9

3. 3

4. 55

5. 1

6. 2

7. 10