1. f(x) = 2x + 4 when x = 5

14

Step-by-step explanation:

Ignore the f(x) for now.

x is 5, so we plug it in to get 2*5+4. Using PEMDAS, you multiply 2 and 5 to get 10 and add 4 to get 14.

-6 is the correct option from the above given options

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.