To multiply terms with exponents, the base of both exponents must be the same. In this case they are so multiply the coefficients and add the exponents:

-9y⁷ x 7y⁷
(-9 x 7)y^{(7 + 7)}
-63y¹⁴

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

3 + (4 + 2) ÷ 4 x 2 - 4²
P: 3 + (6) ÷ 4 x 2 - 4²
E: 3 + 6 ÷ 4 x 2 - 16
MD: 3 + \( \frac{6}{4} \) x 2 - 16
MD: 3 + \( \frac{12}{4} \) - 16
AS: \( \frac{12}{4} \) + \( \frac{12}{4} \) - 16
AS: \( \frac{24}{4} \) - 16
AS: \( \frac{24 - 64}{4} \)
\( \frac{-40}{4} \)
-10

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 multiplication helps in solving expressions like a(b + c). It specifies that the result of multiplying one number by the sum or difference of two numbers can be obtained by multiplying each number individually and then totaling the results: a(b + c) = ab + ac. For example, 4(10-5) = (4 x 10) - (4 x 5) = 40 - 20 = 20.

You have 13 out of the total of 150 raffle tickets sold so you have a (\( \frac{13}{150} \)) x 100 = \( \frac{13 \times 100}{150} \) = \( \frac{1300}{150} \) = 9% chance to win the raffle.