Question

solve this with explanation ​

Answer 1

The second pattern.

$\underline{11} \times 2 - 1 = 22-1=\underline{21} \\ \\ \underline{21} \times 2 -2 = 42-2=\underline{40} \\ \\ \underline{40} \times 2-3=80-3=\underline{77} \\ \\ \underline{77} \times 2-4=154-4=\bold{\underline{150}} \\ \\ \bold{\underline{150}} \times 2-5 =300-5=\bold{\underline{295}}$

Thank you. :-))