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.

9b - 3 > \( \frac{b}{-4} \)
-4 x (9b - 3) > b
(-4 x 9b) + (-4 x -3) > b
-36b + 12 > b
-36b + 12 - b > 0
-36b - b > -12
-37b > -12
b > \( \frac{-12}{-37} \)
b > \(\frac{12}{37}\)

A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).

A triangle is a three-sided polygon. It has three interior angles that add up to 180° (a + b + c = 180°). An exterior angle of a triangle is equal to the sum of the two interior angles that are opposite (d = b + c). The perimeter of a triangle is equal to the sum of the lengths of its three sides, the height of a triangle is equal to the length from the base to the opposite vertex (angle) and the area equals one-half triangle base x height: a = ½ base x height.

The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:

x² - 5x + 4 = 0
(x - 1)(x - 4) = 0

For this expression to be true, the left side of the expression must equal zero. Therefore, either (x - 1) or (x - 4) must equal zero:

If (x - 1) = 0, x must equal 1
If (x - 4) = 0, x must equal 4

So the solution is that x = 1 or 4

A right angle measures 90 degrees and is the intersection of two perpendicular lines. In diagrams, a right angle is indicated by a small box completing a square with the perpendicular lines.