Absolute value and inequalities on the number line Quiz

1. Find $|-9|+|4|$.

• A. $5$
• B. $13$
• C. $-5$
• D. $-13$

2. Which inequality means "$x$ is at least 3"?

• A. $x>3$
• B. $x\le3$
• C. $x\ge3$
• D. $x<3$

3. Write $-1<x\le6$ in interval notation.

• A. $(-1,6]$
• B. $[-1,6]$
• C. $(-1,6)$
• D. $[-1,6)$

4. How many members does $\{x\in\mathbb{Z}:-2<x\le2\}$ have?

• A. $6$
• B. $5$
• C. $3$
• D. $4$

5. Which inequality is equivalent to $|x|<4$?

• A. $-4<x<4$
• B. $x<4$
• C. $x>4$ or $x<-4$
• D. $x>-4$