Answer:
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Step-by-step explanation:

To find f(19) , substitute the value of x that's 19 into f(x). That is for every x in f (x) replace it with 19
We have

We have the final answer as

Hope this helps you
Answer:
a. 25%
b. 55%
c. 35%
Hope it helps you and pls mark as brainliest : )
It has to be the first one
Step-by-step explanation: Your answer is in the photo
Answer:
x = 4 or x = -3
Step-by-step explanation:

Take square both the sides,

x² - x - 12 = 0
x² - 4x + 3x - 3*4 =0
x*(x - 4) + 3*(x - 4)= 0
(x- 4 )(x+3) =0
x -4 =0 or x + 3 = 0
x = 4 or x = -3