exam Maths Puzzle Numerical Ability

Find the slope.
-6x - 9y = 12

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exam Other Question

Name the property of real numbers illutstrated below. Be specific w/ the naming. Include "of addition" or of" multiplication if needed.
8*(4*9)= (8*4)*9
I have always had problems with fractions. If you could help me out so I can do this in the future, that would be great.

1/8 + 5/6 - 2/3