Equations and Inequalities Quiz

1. Solve $2x + 5 = 17$.

• A. A. $x = 5$
• B. B. $x = 6$
• C. C. $x = 11$
• D. D. $x = 21$

2. Which method uses the formula $x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}$?

• A. A. Solving linear equations
• B. B. Solving quadratic equations
• C. C. Solving inequalities
• D. D. Iteration

3. Solve the inequality $-2x > 8$.

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

4. A rectangle has length $x+3$ and width $x$. Its area is 40. Which equation models this?

• A. A. $x^2 + 3x = 40$
• B. B. $2x + 3 = 40$
• C. C. $x^2 - 3x = 40$
• D. D. $x + 3 = 40$

5. In an iterative sequence $x_{n+1} = \sqrt{3x_n+1}$ with $x_0 = 1$, what is $x_1$?

• A. A. $2$
• B. B. $\sqrt{4}=2$
• C. C. $\sqrt{3}$
• D. D. $4$