If k(x) = 2x2 - 3, then k(9) is A) 321 B) 162 C) 159 D) 153

153

153 oui

153 To find the value of k(9), we need to substitute the value x = 9 into the function k(x) = 2x^2 - 3. So, we replace x with 9:

k(9) = 2(9)^2 - 3
= 2(81) - 3
= 162 - 3
= 159

Therefore, the value of k(9) is 159.

The correct answer choice is C) 159.

assuming you meant:

k(x) = 2x^2 - 3
in k(9) , notice that the x was replaced with 9
so replace the x with 9 on the right side of the equation
k(9) = 2(9)^2 - 3 = ....

make sure you follow the order of operation