Timed Mini Exam 18 — Timed Mini Exams

Questions in this quiz (10)

1. Which expression represents $$9$$ less than the product of $$12$$ and a number $$n$$?

   • $$9-12n$$
   • $$12n-9$$
   • $$12(n-9)$$
   • $$\frac{12}{n}-9$$

2. For which two values of $$x$$ is the following expression undefined?$$\frac{15x}{x^2-49}$$

   • $$-49$$ and $$49$$
   • $$-15$$ and $$15$$
   • $$-7$$ and $$7$$
   • $$0$$ and $$49$$

3. Elena purchases a meal that costs $$\$24.00$$. She pays with $$\$40.00$$ and leaves a tip equal to $$18\%$$ of the meal's cost. How much change should Elena receive after paying for the meal and tip?

   • $$\$11.68$$
   • $$\$12.00$$
   • $$\$13.12$$
   • $$\$15.68$$

4. The sum of two polynomials is $$7m^2+9m-4$$. One of the polynomials is $$7m^2-3m+5$$. What is the other polynomial?

   • $$6m-9$$
   • $$12m-9$$
   • $$12m+1$$
   • $$14m^2+6m+1$$

5. Which of the following equations has a slope of $$\frac{1}{2}$$?

   • $$2x-4y=8$$
   • $$4x-8y=16$$
   • $$x+2y=6$$
   • $$4x+2y=10$$

6. What is the equation of the line illustrated in the graph?

   • $$y=x+3$$
   • $$y=\frac{1}{3}x+1$$
   • $$y=3x-1$$
   • $$y=3x+1$$

7. Where does the function $$f(x)=3x^2-48$$ intersect the $$x$$-axis?

   • $$x=-16$$ and $$x=16$$
   • $$x=-4$$ and $$x=4$$
   • $$x=-3$$ and $$x=3$$
   • $$x=4$$ only

8. Which statement best describes the relationship between the data points shown on the scatter plot?

   • There is a positive correlation.
   • There is a negative correlation.
   • There does not appear to be any correlation.
   • The relationship cannot be determined.

9. Find the area of the shape shown in the figure above.

   • $$23$$ square centimeters
   • $$40$$ square centimeters
   • $$50$$ square centimeters
   • $$60$$ square centimeters

10. A container holds $$4$$ quarters, $$6$$ pennies, $$3$$ nickels, and $$7$$ dimes. One coin is selected at random and is found to be a quarter. The quarter is not returned to the container. If a second coin is selected at random, what is the probability that it will also be a quarter?

    • $$\frac{1}{5}$$
    • $$\frac{3}{19}$$
    • $$\frac{4}{19}$$
    • $$\frac{3}{20}$$