When a plane flies with the wind, it can travel 1980 miles in 4.5 hours. when the plane flies in the opposite direction, against the wind, it takes 5.5 hours to fly the same distance. find the velocity of the plane in still air and the average velocity of the wind.

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0

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