book Maths Puzzle Numerical Ability

find the vertex, focus,and directrix of the parabola given by
x^2-10x-8y+33=0

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book Other Question

if a salesman is paid $140 commission on the sale of a 2,800 sailboat.what is his commision rate. Solve for X: 5(X + 2) - 7 (2X - 3) = 22
A) -1 B) -3/2 C) 3/2 D) 1