exam Maths Puzzle Numerical Ability

Let R(x)=x^3-7/x^2+1; what happens to R(x) if we now have R(x)-3?
a)It shiftes 3 units to the left
b)It shiftes 3 units down
c)It shiftes 3 units to the right
d)It shiftes 3 units up

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exam Other Question

HOw can you simplify this problem? The m-2 is inside absolute value lines.
-3 /m-2/ =2 a coffee merchant has coffee beans that sell for $9 a per pound and $12 per pound. The two types are to be mixed to create 100 pounds of mixture that will sell for $11.25 per pound. How much of each type of bean should be in used in the mixture?