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.

4a⁵ - 4a⁵ = 0a⁵

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 9 x 5) + (2 x 5 x 5) + (2 x 9 x 5)
sa = (90) + (50) + (90)
sa = 230

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 equal sign and the answer on the other.

-2y - 7 = -1 + 6y
-2y = -1 + 6y + 7
-2y - 6y = -1 + 7
-8y = 6
y = \( \frac{6}{-8} \)
y = -\(\frac{3}{4}\)

A cube is a rectangular solid box with a height (h), length (l), and width (w). The volume is h x l x w and the surface area is 2lw x 2wh + 2lh.

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.