Mini Exam 6 — Timed Mini Exams

Questions in this quiz (10)

1. $$x=-2y+9$$$$y-x=-3$$What is the value of $$x+y$$ in the system of equations above?

   • $$2$$
   • $$4$$
   • $$6$$
   • $$7$$

2. If $$20%$$ of a number is $$16$$, then what is the value of $$10%$$ of half of the original number?

   • $$8$$
   • $$4$$
   • $$6$$
   • $$10$$

3. $$30%$$ of the students in a school are seniors. If there are a total of $$800$$ students in the school, how many students are seniors?

   • $$180$$
   • $$200$$
   • $$240$$
   • $$220$$

4. During the first year of growth, a plant’s height increases by $$25%$$. If the plant is $$h$$ inches tall after one year, which of the following expressions represents the plant’s height at the beginning of the year?

   • $$0.25h$$
   • $$1.25h$$
   • $$\frac{h}{1.25}$$
   • $$\frac{1.25}{h}$$

5. If $$\frac{1}{8}x+\frac{1}{4}y=10$$, what is the value of $$2x+4y$$?

   • $$80$$
   • $$120$$
   • $$160$$
   • $$180$$

6. Which of the following figures shows the solution of the inequality $$y$$>$$-2x+3$$?

7. If $$|5x-8|=72$$, what is the positive value of $$4x+7$$?

   • $$35$$
   • $$64$$
   • $$71$$
   • $$80$$

8. Which expression is equivalent to $$\frac{6x(x-4)-3(x-4)}{x-4}$$ where $$x\neq 4$$?

   • $$6x$$
   • $$6x-3$$
   • $$\frac{6x-3}{x-4}$$
   • $$6x^2-3x+1$$

9. Where is the vertex of the parabola $$y=3x^2-12x+5$$?

   • $$(-2,7)$$
   • $$(-2,5)$$
   • $$(-2,-7)$$
   • $$(2,-7)$$

10. According to a survey, $$40%$$ of the city’s immigrant population originated from which of the following regions?

    • Asia only
    • South America only
    • Asia and Europe
    • Europe and Africa