Which of this expressions are equivalent to the one below? Check all that apply. 5*(3+7)

A. 5*3+5*7
B. (5*3)+7
C. 5*(7+3)
D. (3+7)*5

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.