exam Maths Puzzle Numerical Ability

-2.5(2a-4)

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exam Other Question

(Use 10 steps)
Given: a and b intersect
Angle 1 is congruent to angle 2
Prove: a is perpendicular to b
Pls. use the two column proof...
The statement and the reason for this The height ,h, in metres reached by a ball thrown into the air t seconds is given by the formula h=80+49t-4.9t^2. How long does it take the ball to reach its maximum height ?