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The expression:
3 (x - 2)
indicates that the number 3 before the parenthesis is multiplying the expression inside the parenthesis.
Then in order to do such we use what is called the distributive property which tells us to "distrubute" suche multiplication among the two term that are in the parenthesis:
3 x - 3 * 2
3 x - 6
Which is the first option in your answer list.
16/18 is the equivalent to 8/9
I think the length would be 6 feet and the width would be 4 feet
Its the same as multiplying a number by 2 because 4/5 divided by 2/5 = 4/5 times 5/2 = 20/10 = 2
i hope this helps!!