exam Maths Puzzle Numerical Ability

suppose f(x)=2x+5 and g(x)= -1/3x +2. Find each value.
1) 2g(7)

can someone explain this to me?

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exam Other Question

12.48 In the following regression, X = weekly pay, Y = income tax withheld, and n = 35 McDonald’s

employees. (a) Write the fitted regression equation. (b) State the degrees of f
Solve:

3x+48=36

*the 3x+48 is in absolute value