PLS HELP ILL GIVE BRAINLIEST

Hi there.

The answer is f(0) = 3.

Explanation:

Given 2 functions with given domains.

where x < -2

where x >= -2

Evaluate the value of f(x) when x = 0. Therefore, f(x)= 5x-1 cannot be used as the given x = 0 is greater than its domain.

Thus, our main function is f(x) = x+3

Evaluate the value by substituting x = 0 in the function.

Thus, the answer is f(0) = 3

Note:  3x = 15/2   ;  

Divide EACH side of the equation by "3" ; 

3x / 3 = (15/2) / 3 ; 

x = (15/2) / (3/1) =  15/2 * 1/3 =  (15*1)/(2*3) = 15/6 = (15/3)/(6/3) = 5/2 
 = 2.5.

So, the equation is true when x = 2.5 ;  and when 3x  = 7.5 ;
                                                              and when 8x = 20.