exam Maths Puzzle Numerical Ability

Can I get some help here?

Graph each function and state its domain and range.
g(x)= x+2

Thanks

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exam Other Question

Solve for X:

X*L^-2=W

Thank you. Multiply the following binomials using the FOIL method:

(x - 2)(x + 4)

I have this....
x^2 - 2x + 4x + 2
x^2 + 2x + 2
Where do I go from here??? Is this even right????