An investor divides $10,000 of his savings into two accounts that will earn him interest. One account is a high-risk high yield account that ends up giving him an average of 12.1% interest per annum that year. The other is a safer savings account that gives him 3.1% interest per annum. If at the end of one year he has a total of $10,805 in the two accounts combined, how much did he invest at each rate? Make sure to 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