exam Maths Puzzle Numerical Ability

Graph f(x)=x+2-5 Give the vertex of this V-graph

~+ means absolute value!!

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exam Other Question

Find the additive inverse of each of the followings; 5, a+b, -(a+b), -5 3square root, (-6+-2)+3, -8 -(-10)+10, -36 / (-6), (-48 / -8) (-2) Find the slope and the y-intercept.
y = 3x + 6
Thank you very much!