The equation of a circle is x2+y2+10x−4y−20=0 .

What is the radius of the circle?

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Combine like terms7y^2 + 7(6y^2 − 8)

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. 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