exam Maths Puzzle Numerical Ability

I need to find the domain to: g(x)=log(x+3) and g(t)=ln(t-1). I am so confused

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exam Other Question

2/3a - 3/4 = 3/4a One angle of a triangle is 3 times as large as another. The third angle is twice the sum of the first 2 angles. What is the measure of the largest angle?