exam Maths Puzzle Numerical Ability

let f(x)=sqrt x+1 and g(x)=1/x+1 and evaluate

(f*g) (x)

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exam Other Question

Can someone help me on this problem? I put it through last night but I typed it in wrong.
Which of the ordered pairs (-3, 3), (9,0), (-3, -3), (-23, 8)

are solutions for the equation x + 4y = 9?

Thanks,
Sher x-2y=-3 solve for x