Hello :
<span>this increasing function F(x)=3x because : the slope 3
is positif</span>
Note that

in the given closed interval, so the area is exactly given by the definite integral

(no absolute values needed!)
Integrating gives
Answer:
1st option will be the answer.
Answer:
x= 45
Step-by-step explanation:
90-45=x
133 112
---- = -------
x 16
112x = 133 . 16
112x = 2128
x = 2128/112
x = 19
answer: x = 19