A line segment is a portion of a line with a measurable length. The midpoint of a line segment is the point exactly halfway between the endpoints. The midpoint bisects (cuts in half) the line segment.

To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.

(9a)(6ab) - (8a²)(3b)
(9 x 6)(a x a x b) - (8 x 3)(a² x b)
(54)(a¹⁺¹ x b) - (24)(a²b)
54a²b - 24a²b
30a²b

To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.

-2c - 3 = 5 - 7c
-2c = 5 - 7c + 3
-2c + 7c = 5 + 3
5c = 8
c = \( \frac{8}{5} \)
c = 1\(\frac{3}{5}\)

The formula for area is πr²:

a = πr²
a = π(2²)
a = 4π

An equation is two expressions separated by an equal sign. The key to solving equations is to repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.