Evin evaluated the product of 5 x 12 as 60 by finding 5 x 10 and adding it to 5 x 2. this is an example of what property?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Find the nonpermissible replacement for binthis expression.b2/5b +5

What is the next step in the given proof? choose the most logical approach. a. statement: m 1 + m 2 + 2(m 3) = 180° reason: angle addition b. statement: m 1 + m 3 = m 2 + m 3 reason: transitive property of equality c. statement: m 1 = m 2 reason: subtraction property of equality d. statement: m 1 + m 2 = m 2 + m 3 reason: substitution property of equality e. statement: 2(m 1) = m 2 + m 3 reason: substitution property of equality