The sequence seems to be that you add 1 and then multiply by 2, and then add 1 and multiply by 3, so I would assume you do 9 + 1 = 10, and then multiply by 4 to get 40 as your next number. I hope this helps!
Answer:
= 1 5/16
[/tex] 1 \frac{5}{16}[/tex]
Step-by-step explanation:
Expand
Collect like terms and simplify
Cross Multiply
Divide both sides of the equation by 80
X = 8.5 because 8.5 x 2 = 17 and 17 + 1 = 18