exam Maths Puzzle Numerical Ability

I am having a hard time trying to figure out how the calculator came up with the answers to the example problem.
Evaluate the left side and the right side of the equility
p=5, q=

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exam Other Question

h/3<-10; a/-3<9; a/-3>-9; a/3<-9 Please help . Find the equation of the line perpendicular to x+2y =3 that passes through the point (-3,4) answer should be in slope intercept form.
Thank you