Witch expression would be easier to simply if you used commutative property to change the order of the numbers A. 1/7 + (-1) + 2/7
B. 120 + 80 + (-65)
C. 40+ 10 + (-12)
D. -15 + (-25) + 43
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1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.