exam Maths Puzzle Numerical Ability

Develop a height equation: A ball thrown upward from the roof of a building 100m tall with an initial velocity of 20m/s. When will the ball reach a height of 80m?

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exam Other Question

find angle T if angle T is 20 more than four times its supplement This is asking to find the distance between (6,0)and (-7,0)

I am getting stuck on the first step, how do bracket (0,0)?
please help