exam Maths Puzzle Numerical Ability

I need help solving these two problems on Radicals:
1. Radical 18 + Radical 12 + Radical 8 =
2. 3 radical 7 - 2 radical 28 =

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exam Other Question

Graph the following equation (please show me step by step how you got your answer). I worked this problem for three hours and got 0 every time.

y = 3/4x + 2 A football is kicked straight upward. A position function s(t)=1/2at^2+v(base 0)t+ s(base 0) can be used to describe the balls height s(t) in ft after t seconds.

Graph: 2 sec