Use PEMDAS (Parentheses, Exponents, Multipy/Divide, Add/Subtract):

2 + (3 + 5) ÷ 2 x 3 - 3²
P: 2 + (8) ÷ 2 x 3 - 3²
E: 2 + 8 ÷ 2 x 3 - 9
MD: 2 + \( \frac{8}{2} \) x 3 - 9
MD: 2 + \( \frac{24}{2} \) - 9
AS: \( \frac{4}{2} \) + \( \frac{24}{2} \) - 9
AS: \( \frac{28}{2} \) - 9
AS: \( \frac{28 - 18}{2} \)
\( \frac{10}{2} \)
5

1

To find the average of these 4 numbers add them together then divide by 4:

\( \frac{9 + 5 + 10 + 4}{4} \) = \( \frac{28}{4} \) = 7

The commutative property states that, when adding or multiplying numbers, the order in which they're added or multiplied does not matter. For example, 3 + 4 and 4 + 3 give the same result, as do 3 x 4 and 4 x 3.

The distributive property for division helps in solving expressions like \({b + c \over a}\). It specifies that the result of dividing a fraction with multiple terms in the numerator and one term in the denominator can be obtained by dividing each term individually and then totaling the results: \({b + c \over a} = {b \over a} + {c \over a}\). For example, \({a^3 + 6a^2 \over a^2} = {a^3 \over a^2} + {6a^2 \over a^2} = a + 6\).