exam Maths Puzzle Numerical Ability

write an equation of the line passing through (-3,8) (5,4)

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exam Other Question

Find the length of the diagonal from the upper right corner of a room to its lower left corner. The height of the room is half its length. The area of the floor is 192 square fee I need help with these problems

5x+4y=7
x-3y=9

4x-5y=-2
3y-x=-3