3a - 18In this activity, we're supposed to simplify the following expression:[tex]\sf 3(a-6)[/tex]When solving this type of problems, we can use what we call the distributive property, which is a formula used in simplifying an expression of this form by distributing a term that's outside the parentheses to the terms that are inside by using multiplication.The formula says: [tex]\sf a(b+c)=a*b+a*c[/tex].Now we apply it to our activity:[tex]\sf 3(a-6)=3*a-3*6=3a-18[/tex]