Sorry, you guys I put the subject in Math its english! But have a nice day! and please help me!

What is 20+(5 x 2/5 )+ 3 show your work

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

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?