Respuesta :
Answer:
the answer is 16
Step-by-step explanation:
x^2 + 7 ( x=3)
3^2 + 7
9 + 7 =
16
x^2 would be that number(x) times itself that many times[ in this case it would be the number 2]
The answer is 16 cause you substitute 3 for x then multiply 3 by 2 then add 9 + 7