Can anyone me figure out how to solve this? i’d really appreciate it : )

So the piecewise is made out of two subfunctions.

when x ⩽ 3, f(x) is 2x - 9, namely when "x" is 3 or less, so it includes 3.

when "x" is more than 3, x > 3, f(x) is 4 - x, however, this subfunction doesn't include 3, just values greater than 3.

so we want f(3), when x = 3, and for that we have to use 2x - 9, therefore

2(3) - 9  ==> 6 - 9 ==>  -3.

Exponential function

11 mintues is the naswer