Hey!
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Question #1:
~Part A
The Order of Operations is way of solving equations. It's important because if you don't use it you will get an answer that is incorrect.
~Part B
We have the equation 3 + 6 * 9.
Using the order of operations we get 57.
Now, if we have the equation (3 + 6) * 9
Using the order of operations we get 81.
As we can see the answers are different. Parenthesis can affect the answer of an equation.
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Question #2:
We could have 4(2 + 4).
Using the distributive property we get (4 * 2) + (4 * 4) = 8 + 16 = 24
We could have 5(5 + 9)
Using the distributive property we get (5 * 5) + (5 * 9) = 25 + 45 = 70
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Hope This Helped! Good Luck!