exam Maths Puzzle Numerical Ability

The cost per mont of making n number of wooden toys is C=3n+30. The income from selling n toys much the cpmpany make to get a profit (I greater than C).

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exam Other Question

write the slope intercept form for an equation of the line perpendicular to the graph of the given equation and passing through the given point?
5y=-x+1, (2,-5)
how do i graph this on a cordinate plane.?
4x < -20