What is 479 estimated by 89

Which operation should be performed first according to the order of operations? 44 • 2 – [(5 + 20 • 3) – 12] + 16 ÷ 2 5 + 20 20 • 3 16 ÷ 2 44 • 2

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

What could explain what happened when the time was equal to 120 minutes