exam Maths Puzzle Numerical Ability

Find the value of "r" so the line that passes through each pair of points has the given slope:
(5, 9), (r, -3), m = -4
thx for your help

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exam Other Question

1)ln(x+2)+ln(x-3)=
2)log4(6x^2-x-15)-log4(3x-5)=
3)4log5^6= Copy and complete the sataement using <,> or =

3^7 x 3^4 ____ 3^10

Any help with this equation would be greatly</b> appreciated