exam Maths Puzzle Numerical Ability

-27+(-16)=?

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exam Other Question

What is the equation of the line passing throughhe point (2,0)?

y=-2x-1
y=(1/2)x-1
y=x-4
y=3x+3 Simplify each expression. The Distributive Property
-[-5(y+2z)-3z]

I am not sure how to do it.
Please help me.