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.

9a - 9 > \( \frac{a}{6} \)
6 x (9a - 9) > a
(6 x 9a) + (6 x -9) > a
54a - 54 > a
54a - 54 - a > 0
54a - a > 54
53a > 54
a > \( \frac{54}{53} \)
a > 1\(\frac{1}{53}\)

To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.

5a - 8a = -3a

The formula for area is πr²:

a = πr²
a = π(3²)
a = 9π

A line on the coordinate grid can be defined by a slope-intercept equation: y = mx + b. For a given value of x, the value of y can be determined given the slope (m) and y-intercept (b) of the line. The slope of a line is change in y over change in x, \({\Delta y \over \Delta x}\), and the y-intercept is the y-coordinate where the line crosses the vertical y-axis.

The formula for circumference is circle diameter x π:

c = πd
c = 16π