exam Maths Puzzle Numerical Ability

The measure of an angle is 21 degrees more than twice its supplement. Find the measure of each angle?

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Could you please help me with this word problem.
Science and medicine. Alkaid, the most distant star in the Big Dipper, is
2.1 X 10^18 m from the Earth. Approximately how long does it take light to travel from Alkaid to the Earth?

Thank you
Could you help me solve this px

5. (3 pts) Given U = {18. 19. 20, 21, 22, 23, 24, 25, 26, 27, 28, 29}, A = {21, 23, 25, 27, 29}, and
B = {26, 27, 28, 29}. Find A′