exam Maths Puzzle Numerical Ability

need help:
ADD:

3
+
2
____
x2

please write out left to right thats how its suppose to be written

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exam Other Question

Please help me solve this problem:
the direction are as follow: Find the domain of the function, use interval notation:

f(x)= 3 divided by (x+4) graph for y = 2x. graph for y = x + 1.