How many variable terms are in the expression 3x^3y+5x^2-4y+z+9? numeric value only.

Three times the sum of a number and seven is negative thirty-six. what is the number?

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

What is the length of the midsegment of a trapezoid with bases of length 15 and 25 ?