To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses:

(y + 8)(y + 5)
(y x y) + (y x 5) + (8 x y) + (8 x 5)
y² + 5y + 8y + 40
y² + 13y + 40

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 > sign and the answer on the other.

-8a - 1 > \( \frac{a}{8} \)
8 x (-8a - 1) > a
(8 x -8a) + (8 x -1) > a
-64a - 8 > a
-64a - 8 - a > 0
-64a - a > 8
-65a > 8
a > \( \frac{8}{-65} \)
a > -\(\frac{8}{65}\)

An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.

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.

The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)² : a = π r².