Answer:
[tex]2.5[/tex]
Step-by-step explanation:
We want to evaluate [tex]ab-0.5b[/tex] when a=1 and b=5.
We just have to substitute the value of a and b into the given expression and simplify.
[tex](1)(5)-0.5(5)[/tex]
This simplifies to:
[tex]5-2.5[/tex]
This will finally give us;
[tex]2.5[/tex]
