A) 22
B) 16
C) −0.5
D) 40
7 Answers

f(3) = 2(3)^2 + 4 = 2*9 + 4 = 22
A) 22

2(3^2)+4 is 2(9)+4 18+4 22 if for some reason
You meant 2(3)(2)+4 you get 4(3+4 and that equals 16 so if the x is squared answer is 22 if x is being multiplied by 4 which you wrote as 2×2 then answer is 16

f(x) = 2x^2 + 4
f(3) means putting 3 instead of x in the previous equation
f(3) = 2· 3^2 + 4 = 2· 9 + 4 = 18 + 4 = 22

Replace x with three and count.
2(3)^2 +4
2*9+4=22
A)

f (x) = 2x² +4
f(3) =2(3)² +4 = 22
A is correct

Just plug 3 in for the x in the function,
You should get A. 22

f(x) = 2×2 + 4
f(3) = 232 + 4
Complete the calculation yourself.