Given the following functions f(x) and g(x), solve (f + g)(3) and select the correct answer below:
f(x) = 2x + 21
g(x) = x − 24

Let f(x) and g(x) be the function then;

Given the functions:

Solve for :

          .....[1]

Put x = 3 in f(x) and g(x) we have;

and

Substitute these values in [1] we have;

Therefore, the value of  is 6

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

step-by-step explanation: s