Answer & Step-by-step explanation:
PEMDAS:
Parentheses
Exponents
Multiplication and Division left to right
Addition and Subtraction left to right
We have two forms of grouping in the expression. Do the inner-most one first, still following PEMDAS within the grouping symbol:
Simplify division:
[tex]6/4=1.5\\1.5-1=0.5\\[/tex]
Re-insert:
[tex]40/(19-1+0.5)[/tex]
Simplify subtraction and addition within parentheses:
[tex]19-1+0.5\\18+0.5\\18.5[/tex]
Re-insert:
[tex]40/18.5[/tex]
Simplify division:
[tex]40/18.5=2.162162162162162162.....[/tex]
:Done
