book Maths Puzzle Numerical Ability

what is the slope and y intercept of 4x-5y=20?

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book Other Question

i need to know a bout co-ordinates but it dousnt say it on the choises
so can you answer this question on wher the origin is on a co-ordinate graph. The perimeter of a rectangle is to be no greater than 300 in. and the length must be 125 in. Find the maximum width of the rectangle.