Timed Mini Exam 32 — Timed Mini Exams

Questions in this quiz (10)

1. A teacher is purchasing clay for $$29$$ students. Each student needs $$0.52$$ pound of clay. About how many pounds of clay should the teacher purchase?

   • $$10$$ pounds
   • $$15$$ pounds
   • $$30$$ pounds
   • $$60$$ pounds

2. Evaluate the expression:$$|-18+7|-|-35|$$

   • $$-46$$
   • $$-24$$
   • $$24$$
   • $$46$$

3. A cleaning company charges $$\$4$$ for every $$12$$ square feet of carpet cleaned. If a homeowner can spend no more than $$\$220$$, what is the greatest area of carpet that can be cleaned?

   • $$440$$ square feet
   • $$550$$ square feet
   • $$660$$ square feet
   • $$880$$ square feet

4. $$x-2y=8$$$$x+2y=14$$What value of $$x$$ satisfies the system of equations?

   • $$-6$$
   • $$6$$
   • $$11$$
   • There is no value of $$x$$.

5. Which line is neither parallel nor perpendicular to the line represented by $$2y+6x=10$$?

   • $$y=-3x-4$$
   • $$y=\frac{1}{3}x+2$$
   • $$y=2x-1$$
   • $$3y-x=9$$

6. The number of bacteria in an experiment is modeled by $$P(t)=75(3)^t$$, where $$t$$ is measured in hours. Which statement correctly describes the bacterial population?

   • The initial population is $$3$$ bacteria.
   • The population increases by $$75$$ bacteria each hour.
   • The population triples each hour.
   • The population decreases by a factor of $$3$$ each hour.

7. Members of a trading-card group counted the number of rare cards in their collections. The results are displayed in the dot plot.What is the mode of the data?

   • $$12$$
   • $$16$$
   • $$20$$
   • $$32$$

8. A pyramid has a square base with a side length of $$720$$ feet and a height of $$400$$ feet. What is the volume of the pyramid?

   • $$23{,}040{,}000$$ cubic feet
   • $$69{,}120{,}000$$ cubic feet
   • $$103{,}680{,}000$$ cubic feet
   • $$207{,}360{,}000$$ cubic feet

9. The recorded scores of seven players are $$94$$, $$108$$, $$116$$, $$121$$, $$134$$, $$142$$, and $$180$$. The score recorded as $$180$$ should have been $$225$$. How will this correction affect the mean and median?

   • Both the mean and median increase.
   • Both the mean and median remain unchanged.
   • The median decreases and the mean increases.
   • The median remains unchanged and the mean increases.

10. Maria is $$6$$ years old, and Joel is $$3$$ years old. If $$M$$ represents Maria’s age and $$J$$ represents Joel’s age at any time in their lives, which equation represents their age relationship?

    • $$M=2J$$
    • $$M=J+3$$
    • $$J=M+3$$
    • $$M=3J$$