exam Maths Puzzle Numerical Ability

Find the value of the polynomial.

-x2 + 3x - 1 when x = 4.

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exam Other Question

Tell wheather the given value of the varible is a solution of the equation.
-2(3x+7)=-3(2x+8);x=-5.

Thanks u for all the help! 1.which is the equation of the line is perpendicular bisector of the segment with endpoints (n,5) and (n, -3)
A)y=1
B)y=4
c)x=4
D)y=n

2.which are the coordinates of the vert