8th Grade Quiz Bowl 2022~ Round 1

Removing which ordered pair would make the graph a function?

• (-4,-3)

• (2,-2)

• (3,2)

• (4,3)

A picometer can be expressed as 1 x 10^-12 meters, and a decimeter can be expressed as 1 x 10^-1 meters. How many times larger is a picometer than a decimeter?

• 10,000

• 100,000

• 10,000,000,000

• 100,000,000,000

A student's work to solve an equation is shown.

 $\frac{1}{6}$  (54x + 18) = 2x - 11(x - 1) - 8 

9x + 3 = 2x - 11x + 11 - 8
9x + 3 = -9x + 3
18x = 0
no solution

Which statement is true?

• The student solved the equation correctly because the original equation has no solution.

• The student solved the equation incorrectly; the correct answer is infintely many solutions.

• The final answer should be x =  $\frac{1}{2}$ instead of no solution.

• The final answer should be x = 0 instead of no solution.

A list of numbers is shown:

 $\sqrt{113}$  , 10.7,  $\sqrt{116}$  ,  $\frac{125}{10}$  , 7.2

Which list is in descending order?

•  $\frac{125}{10}$  ,  $\sqrt{116}$  , 10.7,  $\sqrt{113}$  , 7.2

•  $\frac{125}{10}$  ,  $\sqrt{116}$  ,  $\sqrt{113}$  , 10.7, 7.2

• 7.2,  $\sqrt{113}$  , 10.7,  $\sqrt{116}$  ,  $\frac{125}{10}$  

• 7.2, 10.7,  $\sqrt{113}$  ,  $\sqrt{116}$  ,  $\frac{125}{10}$  

Eighth graders were surveyed about whether or not they play video games. Their results were recorded in the two-way table shown.

What is the relative frequency, rounded to the nearest tenth of a percent, of students who do not play video games?

• 21.5%

• 48.0%

• 51.9%

• 52.0%

Given triangle XYZ located on a coordinate plane, angle Y measures 120 degrees.

If the triangle is rotated 270 degrees counterclockwise about the origin to form triangle X' Y' Z', what is the measure of angle Y'?

• 60 degrees

• 90 degrees

• 120 degrees

• 240 degrees

KM Gym offers two membership plans. The tables represent the monthly cost, in dollars, of each plan based on the number of classes taken at the fitness center.

After a certain number of classes, both plans will cost the same. At that number, how much will both plans cost, in dollars?

• $49

• $52

• $9

• $54

Which of the following represents a linear equation?

• 5 + 2y = 4x

Trace is wanting to add a diagonally placed rod within the rectangular prism shown using the line d. To the nearest tenth, what is the closest measurement of line d?

• 8.2 units

• 6.6 units

• 6.5 units

• 9.6 units