Answer:
18
Step-by-step explanation:
90% of 20 is 18
Answer:
Option C, 
Step-by-step explanation:





Answer: Option C, 
Answer: (7x + 1)(x + 7)
Step-by-step explanation:

You replace the y with f(x)
So it becomes f(x)=2x+1
810/2= 405
810/3= 270
810/4= 202.5 (not this one)
810/5= 162
810/6= 135
810/7= 115.71 ( not this one)
810/8= 101.25 (not this one)
810/9= 90
810/10= 81
810/11= 73.63 (not this one)
I hope this helps you!