exam Maths Puzzle Numerical Ability

Find the domain of the following

g(x) = 5x/( x^2+25)

f(x) = √(x+6)

k(t) = 〖5t〗^2- 6t+2
k(x) = (3x-3)/(x+2)
m(x) = 5x+7

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exam Other Question
Ok, the polynomial f(x) divided x-3 results in a quotient of x^2+3x-5 with a remainder of 2. What is f(3)? how can you divide a segment or an angle into two equal parts?