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  1)  16

  2a)  100 -a -2b

  2bi)  (100 -a -2b)/4

  2bii)  11

Step-by-step explanation:

1. Put the numbers where the corresponding variables are and do the arithmetic.

  (2(1) +3(-2))^2 = (2 -6)^2 = (-4)^2 = 16

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2. The pieces cut from the wire have the lengths a, b, b. The sum of those lengths is a+b+b = a+2b.

2a. The remaining length is what is left when the total of cut pieces is subtracted from the original amount:

  100 -(a+2b) = 100 -a -2b

2bi. The perimeter of the square is the amount in part (2a). A square has 4 sides of the same length, so each side has a length that is 1/4 of the perimeter. The side length is ...

  (100 -a -2b)/4 . . . . length of one side of the square

2bii. Fill in the given values for "a" and "b" and do the arithmetic.

  (100 -24 -2(16))/4 = (76 -32)/4 = 44/4 = 11 . . . one side of the square

22.83 repeating

step-by-step explanation:

137 ÷ 6 is 22.8333333 therefore we understand that 3 is repeating.

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