exam Maths Puzzle Numerical Ability

Please I need help solving this problem

A real estate agent received a 5.5% commission on the sale of a home. If the home sold for $620,000, how much was her commission?

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exam Other Question

Find the value of k so that the point P lies on line L.

P(2,1), L: 3x + ky= 8
I got to find the slop of the line through the following pairs of points



(-5 , -3 ) and (-5, 2)