exam Maths Puzzle Numerical Ability

Please help me solve this problem thank you in advance

sol:-since x=2/3 therefore substitute value of x in eq 1 e.g. 3(2/3)+6y=0then 2+6y=0 then 6y=-2 ory=-1/3

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Find the slope of the line that passes through the pair of points.

(1,7),(10,1) Find the zeros of the polynomial function and state the multiplicity of each. Graph the polynomial function. Factor first if the expression is not in factored form.
f(x)=3x squared (x-2)(x+1)