exam Maths Puzzle Numerical Ability

Let f(x)=sqrt x+1 and g(x)= 1/x+1. find the following and state the domain for each

(f+g)(x)

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exam Other Question

Determine the speed of a motorboat in still water and the speed of the river current, if it takes 3 hrs to travel a distance of 45 miles upstream and 2 hrs to travel 50 miles downstream. Solve for x.

x^2+4x+4=7