exam Maths Puzzle Numerical Ability

I have a homework question that I do not know how to do. It states:
Graph the solution set y<or equal to (x+5)
y<2

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exam Other Question

Solve for c:

a= square root 2 over bc



a)c=2 over a^2b
b)c=2a^2 over b
c)c=2b over a^2
d)c=2a^2b
what is the domain of the following equation?
3x-y=13

A. the set of all real numbers
B. 7/3
C. all positive real numbers
D. No real numbers