book Maths Puzzle Numerical Ability

please help me solve this.
write an equation of a line given (x1,y1)=(12,7) and (x2,y2)=(-4,5)

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book Other Question

whats 10*3= A worker at a tile store needs to replace a bathroom floor. She wants to use only one shape of tile to cover the floor. Which shape tile will NOT cover the floor without leaving