Mini Exam 5 — Timed Mini Exams

Questions in this quiz (10)

1. Simplify: $$|-10+2|$$

   • $$-12$$
   • $$-8$$
   • $$8$$
   • $$12$$

2. Which value of $$x$$ makes the expression $$\frac{3x-6}{2x}$$ undefined?

   • $$-6$$
   • $$-2$$
   • $$0$$
   • $$3$$

3. What is the value of $$\frac{2x^4-2x^3+3x^2-x-10}{-x^2-3x+5}$$ when $$x=4?$$

   • $$-18\frac{4}{23}$$
   • $$-9\frac{25}{33}$$
   • $$14\frac{14}{23}$$
   • $$19\frac{9}{23}$$

4. The product of two consecutive even numbers is 624. Which equation can be used to solve for the numbers?

   • $$x^2+x=624$$
   • $$x^2+2x=624$$
   • $$2x+1=624$$
   • $$2x+2=524$$

5. The diameter of a circle is 18.4 centimeters. Determine the approximate circumference of the circle. Use: $$\pi\approx3.14$$

   • $$1{,}063\text{ cm}$$
   • $$266\text{ cm}$$
   • $$115\text{ cm}$$
   • $$58\text{ cm}$$

6. An isosceles triangle has a base of 36 feet and a perpendicular height of 24 feet. What is the area of the triangle?

   • $$432\text{ ft}^2$$
   • $$540\text{ ft}^2$$
   • $$864\text{ ft}^2$$
   • $$1{,}080\text{ ft}^2$$

7. A right prism with a triangular base has a volume of: $$154\text{ in}^3$$ The prism is 4 inches tall. The triangular base has a height of 11 inches. What is the base length of the triangular base?

   • $$5\text{ in}$$
   • $$7\text{ in}$$
   • $$11\text{ in}$$
   • $$14\text{ in}$$

8. If a fair six-sided die is rolled 80 times, theoretically how many rolls should land on a number less than 4?

   • $$3$$
   • $$20$$
   • $$40$$
   • $$60$$

9. A student tosses a fair coin three times, and the results are heads, tails, and then heads. What can be concluded about the fourth toss?

   • It will be heads.
   • It will be tails.
   • There is a 50% chance that it will be heads.
   • There is a 75% chance that it will be heads.

10. A histogram shows the following final-grade frequencies in a College Algebra class: $$ \begin{array}{c|c} \text{Grade interval} & \text{Number of students}\\ \hline 50\text{–}59 & 7\\ 60\text{–}69 & 8\\ 70\text{–}79 & 9\\ 80\text{–}89 & 8\\ 90\text{–}100 & 7 \end{array} $$ How many students did **not** receive at least a 70?

    • $$7$$
    • $$8$$
    • $$9$$
    • $$15$$