ACT Practice

Front

What is the slope of a line perpendicular to a line with slope m?

Back

The slope of a line perpendicular to a line with slope m is -1/m.

Front

What is the least common multiple (LCM) of 3, 5, and 6?

Back

The least common multiple (LCM) of 3, 5, and 6 is 30.

Front

What is the relationship between corresponding angles when two parallel lines are cut by a transversal?

Back

Corresponding angles are equal when two parallel lines are cut by a transversal.

Front

How do you calculate the sale price after a percentage discount?

Back

Sale Price = Original Price - (Discount Percentage × Original Price).

Front

What is the formula for finding the difference between two expressions?

Back

Difference = Expression 1 - Expression 2.

Front

If x = 3 and y = 5, how do you evaluate the expression 3x² - 2y?

Back

Substituting x and y gives 3(3)² - 2(5) = 27 - 10 = 17.

Front

What is the formula for calculating the percentage of a number?

Back

Percentage = (Part/Whole) × 100.

Front

What is the definition of parallel lines?

Back

Parallel lines are lines in a plane that never meet and are always the same distance apart.

Front

What is the formula for the slope of a line given two points (x1, y1) and (x2, y2)?

Back

Slope (m) = (y2 - y1) / (x2 - x1).

Front

What is the definition of a transversal in geometry?

Back

A transversal is a line that crosses at least two other lines.