exam Maths Puzzle Numerical Ability

let r(x)=x+1/x-1 If T(X)=R(x)+1, Then T(x)=

T(x)=2x/x+1

T(x)=x+2/x+1

T(x)=x+2/x-1

T(x)= 2x/x-1

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exam Other Question

The amount of money Army Striegel collected in tips as a waitress in each of seven days $25, $60, $37,$48, $100,$140,$59. Find the mean, median, mode, and midrange.

Please help me solve! Find the equation of the line.
Slope -1/3 y-intercept (0,3/2)

The problem is I do not know how to begin solving it could you give me the steps or an example of this problem with using same method but different numbers.