Mini Exam 15 — Timed Mini Exams

Questions in this quiz (10)

1. Find the median for the data set: $$34,31,37,35,38,33,39,32,36,35,37,33$$

   • 35

2. $$2y+x=-20$$ $$y=-x-12$$Which of the following is the solution of the system of equations above?

   • $$(4,8)$$
   • $$(4,-8)$$
   • $$(-4,8)$$
   • $$(-4,-8)$$

3. Which expression is equivalent to $$(4y^2+3)(2y+5)$$?

   • $$8y^3+10y^2+16y+15$$
   • $$8y^3+20y^2+16y+15$$
   • $$8y^3+10y^2+6y+15$$
   • $$8y^3+20y^2+6y+15$$

4. Which expression is equivalent to $$(-3x^2-2xy+4y^2)+(5x^2+3xy-3y^2)$$?

   • $$2x^2-xy+y^2$$
   • $$-2x^2-xy+y^2$$
   • $$-2x^2+xy+y^2$$
   • $$2x^2+xy+y^2$$

5. In a game, positive and negative points can be scored. For 10 turns, the point total is $$-5,+4,-7,-2,0,+3,+5,-6,-4,+2$$. What is the average point total?

   • -1

6. Solve. $$x^3=-216$$

   • -6

7. Find the mode for the data set: $$42$$, $$45$$, $$44$$, $$44$$, $$45$$, $$42$$, $$45$$, $$44$$, $$45$$, $$46$$, $$42$$, $$44$$, $$41$$, $$48$$, $$47$$, $$46$$, $$45$$, $$42$$, $$42$$, $$44$$, $$44$$

   • 44

8. A family has three children. What is the probability that the family has three boys?

   • $$\frac13$$
   • $$\frac16$$
   • $$\frac18$$
   • $$\frac{1}{10}$$

9. The graph shows the rainfall amount, in inches, for 12 days. Which statement is supported by the graph?

   • It rained more than 1 inch for half of the days.
   • The average amount of rainfall was 1 inch.
   • It did not rain on the final day data was recorded.
   • The amount of rainfall steadily decreased throughout the days.

10. The equation $$46=2a+2b$$ gives the relationship between the side lengths $$a$$ and $$b$$ of a certain parallelogram. If $$a=9$$, what is the value of $$b$$?

    • 14