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 - 7 > \( \frac{b}{-2} \)
-2 x (-9b - 7) > b
(-2 x -9b) + (-2 x -7) > b
18b + 14 > b
18b + 14 - b > 0
18b - b > -14
17b > -14
b > \( \frac{-14}{17} \)
b > -\(\frac{14}{17}\)

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 + 4)
(y x y) + (y x 4) + (8 x y) + (8 x 4)
y² + 4y + 8y + 32
y² + 12y + 32

Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).

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.

6a⁴ - 3a⁴ = 3a⁴

The surface area of a cylinder is 2πr² + 2πrh:

sa = 2πr² + 2πrh
sa = 2π(1²) + 2π(1 x 8)
sa = 2π(1) + 2π(8)
sa = (2 x 1)π + (2 x 8)π
sa = 2π + 16π
sa = 18π