Substituting x = 2 into the equation y = 2(2) + 1 gives y = 5, so the point (2, 5) lies on the line.

A concave hexagon has at least one interior angle greater than 180 degrees, which makes it a non-convex polygon.

The number of diagonals in a polygon is given by n(n-3)/2. For a hexagon (n=6), it has 9 diagonals, which is more than the others.

A star-shaped polygon has at least one interior angle greater than 180 degrees, making it concave.

A concave hexagon has at least one interior angle greater than 180 degrees, making it a non-convex polygon.

The polynomial x^2 + 4x + 4 can be factored as (x + 2)^2, making it a perfect square.

A quadratic polynomial is defined as a polynomial of degree 2, which is 2x^2 + 3x - 5.

A quadratic equation has a maximum value when the coefficient of x² is negative. Here, all options have a positive coefficient, but the first option can be rewritten to show its vertex form.

A rhombus has all sides equal and opposite angles equal.

In a rectangle, the diagonals are equal in length but are not necessarily perpendicular.

In a rectangle, the diagonals are equal in length but not perpendicular.

In a rectangle, the diagonals are equal in length.

In a kite, the diagonals bisect each other but are not equal in length.

In a rhombus, the diagonals bisect each other at right angles.

A parallelogram is defined as a quadrilateral with opposite sides that are both equal and parallel.

A rhombus has opposite sides that are equal and parallel, making it a special type of parallelogram.

A square has equal diagonals, which is a property of squares and rectangles.

The change of base formula states that log_a(b) can be expressed as log_c(b) divided by log_c(a).

The slope-intercept form of a line is y = mx + b, where m is the slope and b is the y-intercept.

10^(3x) can be rewritten as (10^3)^x = 1000^x.

4^(3/2) can be rewritten as (2^2)^(3/2) = 2^(2*3/2) = 2^3 = 8.

x^2 - 9 is a difference of squares, which factors to (x - 3)(x + 3).

x^2 - 9 is a difference of squares, which factors to (x - 3)(x + 3).

In the equation y = mx + b, 'm' represents the slope of the line.

The sequence 2, 4, 8 does not have reciprocals that form an arithmetic progression, hence it cannot be a harmonic progression.

The sequence 2, 4, 8, 16 has a constant ratio of 2, making it a geometric progression.

The sequence 1, 1/2, 1/3 has reciprocals 1, 2, 3 which are in arithmetic progression, thus it is a harmonic progression.

An arithmetic progression has a constant difference between consecutive terms. The sequence 1, 3, 5, 7 has a common difference of 2.

Matrices are versatile mathematical structures that can represent data in multiple dimensions and are widely used in various fields, including computer science, engineering, and statistics.

The sum of probabilities of all possible outcomes must equal 1, which is a fundamental principle in probability theory.