Question

To all people who are good at math
please help me answer this question, I will give 30 points

Answer 1

10

Explanation:

If you use "p.e.m/d.a/s." you do parenthesis first if we subsutute "n" as 10, 10-9=1 then you eqation is 2(1)-1=1

2x1 is 2 now your eqation is 2-1=1

obviously 2-1 =1