exam Maths Puzzle Numerical Ability

How do you determine whether to draw the boundary line of the graph of a linear inequality dashed or solid

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exam Other Question

Hello im having problems soving these 2 problems its asking me to solve.

let h(x)=4x-x^2. Find such that h(a)= -32

the other problem im having trouble with it

f(x)= 2x/5x^2-20

thanks for your help the equation of a line yhat is perpendicular to the line y=-3x+4