Perimeter is equal to the sum of the four sides:

p = a + b + c + d
p = 7 + 8 + 6 + 9
p = 30

To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.

(2a)(3ab) - (5a²)(7b)
(2 x 3)(a x a x b) - (5 x 7)(a² x b)
(6)(a¹⁺¹ x b) - (35)(a²b)
6a²b - 35a²b
-29a²b

To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.

(8a)(8ab) + (9a²)(6b)
(8 x 8)(a x a x b) + (9 x 6)(a² x b)
(64)(a¹⁺¹ x b) + (54)(a²b)
64a²b + 54a²b
118a²b

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.

5z - 6 > 6 - 9z
5z > 6 - 9z + 6
5z + 9z > 6 + 6
14z > 12
z > \( \frac{12}{14} \)
z > \(\frac{6}{7}\)

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.