8th Grade Math Semester 1 Review

Front

What is the value of x in the equation x² = 49?

Back

x = +7 or -7

Front

In order for the data in the table to represent a function, which ordered pair should be removed from the table? (3, 4)

Back

(3, 4) is not a function because it has the same x-value as another ordered pair.

Front

What does the slope of a line represent in a graph of price charged for international phone calls?

Back

The slope represents the cost per minute of each call.

Front

How many times bigger is the distance from the Earth to the Sun (9 x 10⁶ miles) than the distance from the Earth to the Moon (3 x 10⁵ miles)?

Back

30 times bigger.

Front

Solve for x: 7x = 168

Back

x = 24.

Front

What is a function?

Back

A relation where each input has exactly one output.

Front

What is the slope-intercept form of a linear equation?

Back

y = mx + b, where m is the slope and b is the y-intercept.

Front

What is the Pythagorean theorem?

Back

In a right triangle, a² + b² = c², where c is the hypotenuse.

Front

What is the area of a rectangle?

Back

Area = length × width.

Front

What is the formula for the volume of a cylinder?

Back

Volume = πr²h, where r is the radius and h is the height.