Respuesta :
B. 18a-13.5 The expression 6a-4.5 can represent Jason's age. (Because this is half of the given expression for his brother.) When 6a-4.5 is added to the age of his bother, 12a-9, the result is the function 18a-13.5.
Answer:
[tex]18a - 13.5[/tex]
Step-by-step explanation:
Jason's age is [tex]\frac{1}{2}[/tex] of his brother's age.
Brother age is [tex]12a-9[/tex]
Sum of their ages = Age of Jonson + age of his brother
Jonson's age = half of his brother age
[tex]Jonson's \ age=\frac{12a-9}{2}[/tex]
Sum of their ages =[tex]\frac{12a-9}{2}+12a-9[/tex]
Take common denominator 2
[tex]\frac{12a-9}{2}+\frac{24a-18}{2}[/tex]
[tex]\frac{36a-27}{2} [/tex]
[tex]18a - 13.5[/tex]
