The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):

sa = 2lw + 2wh + 2lh
sa = (2 x 1 x 1) + (2 x 1 x 3) + (2 x 1 x 3)
sa = (2) + (6) + (6)
sa = 14

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 + 2)
(y x y) + (y x 2) + (-8 x y) + (-8 x 2)
y² + 2y - 8y - 16
y² - 6y - 16

To solve this equation, isolate the variable for which you are solving (c) on one side of the equation and put everything else on the other side.

-5c + 6y = 9c + 3y + 8
-5c = 9c + 3y + 8 - 6y
-5c - 9c = 3y + 8 - 6y
-14c = -3y + 8
c = \( \frac{-3y + 8}{-14} \)
c = \( \frac{-3y}{-14} \) + \( \frac{8}{-14} \)
c = \(\frac{3}{14}\)y - \(\frac{4}{7}\)

A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.

The volume of a cube is height x length x width:

v = h x l x w
v = 1 x 9 x 7
v = 63