PARCC 8th Grade Math Items

What is the formula for the circumference of a circle?

• Circumference = πd, where d is the diameter.

• Circumference = 2πr, where r is the radius.

• Circumference = πr^2, where r is the radius.

• Circumference = 2r, where r is the radius.

What is the volume of a rectangular prism?

• Volume = length + width + height.

• Volume = length × width × height.

• Volume = length × height × depth.

• Volume = width × height × depth.

How do you convert a fraction to a decimal?

• Multiply the numerator by the denominator.

• Add the numerator and denominator together.

• Divide the numerator by the denominator.

• Subtract the denominator from the numerator.

What is the purpose of a graph in mathematics?

• A graph is used to create complex equations.

• A graph visually represents data or relationships between variables, making it easier to analyze and interpret information.

• A graph is primarily used for drawing shapes and figures.

• A graph serves as a decorative element in mathematical presentations.

Define a rational number.

• A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

• A rational number is a number that cannot be expressed as a fraction.

• A rational number is any number that is a whole number or an integer.

• A rational number is a number that has an infinite number of decimal places.

How do you find the slope of a line given two points?

• Slope (m) = (y2 - y1) / (x2 - x1) for points (x1, y1) and (x2, y2).

• Slope (m) = (x2 - x1) / (y2 - y1) for points (x1, y1) and (x2, y2).

• Slope (m) = (y1 + y2) / (x1 + x2) for points (x1, y1) and (x2, y2).

• Slope (m) = (y2 + y1) / (x2 - x1) for points (x1, y1) and (x2, y2).

What is the distributive property?

• The distributive property states that a(b + c) = ab + ac.

• The distributive property states that a + b = ab.

• The distributive property states that a(b - c) = ab - ac.

• The distributive property states that a(b + c) = a + b + c.

Define a variable in mathematics.

• A variable is a constant value used in calculations.

• A variable is a symbol used to represent an unknown value in mathematical expressions or equations.

• A variable is a fixed number that does not change.

• A variable is a type of mathematical operation.

What is the formula for the area of a rectangle?

• Area = length × width

• Area = length + width

• Area = length ÷ width

• Area = 2 × (length + width)

How do you calculate the mean of a set of numbers?

• Mean = (Sum of all values) / (Number of values)

• Mean = (Product of all values) / (Number of values)

• Mean = (Sum of all values) * (Number of values)

• Mean = (Largest value + Smallest value) / 2