Question

If s(x) = 2 – x2 and t(x) = 3x, which value is equivalent to (s*f)(-7)?

a. -439
b. -141
c. 153
d. 443

Answer 1

Answer:

Step-by-step explanation:S(x) = 2 - x^2

t(x) = 3x

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

(s o t)(-7) = 2 - 9(-7)^2 = 2 - 9(49) = 2 - 441 = -439

Hope it helps

Answer 2

Answer:

Since in the question s(x) is given as 2 - x^2 and t(x) is given as 3x then to find the value of s of f we have to place the value of t(x) in the s(x).

Now, (s of t(x))= 2 - (3x)^2.

Then the value of s of t(x) we will get 2 - 9x^2.

So, now putting the value of s of t(x) as (-7) we will get the value as 2-9(-7)^2.

Then, (s*f) = 2 - 441 which will be equal to -439.