exam Maths Puzzle Numerical Ability

The polynomial -4.9t^2+40t+20 represents the distance above the ground of an object thrown straigt up an initial height of 20 meters and with an initial speed of 40 meters per seco

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First off, we are asked to find the value of x. Then, we are given a triangle. One angle measures 133 degrees. Another is (x+20)degrees. Another is 2x degrees. How do we solve these types of problems? We have 6 different ones. Thanks. Solve 50q-43=52q-81.
What percent of 74 is 481?