If s (x) = 2 - x2 and t (x) = 3x, which value is equivalent to? - 439 - 141 153 443

The correct option is - 439

Step-by-step explanation:

We have given that s (x) = 2 - x2 and t (x) = 3x. We have to find the equivalent value.

s (x) = 2 - x2

t (x) = 3x

(s o t) (x) = s (t (x))

s (t (x)) = 2 - (3x) ^2 = 2-9x^2

So, now putting the value of s of t (x) as (-7) we will get the value as:

(s o t) (-7) = 2-9 (-7) ^2 = 2 - 9 (49)

(s o t) (-7) = 2-441

(s o t) (-7) = - 439

Thus the correct answer is option A ...