Jason's age is 1 2 of his brother's age. His brother's age can be represented by the expression 12a - 9. Write an expression that can be used to represent the sum of their ages. A) 12a - 5.5 B) 18a - 13.5 C) 18a + 21 Eliminate D) (12a-9) 2

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Yaretzi

Mathematics

2 January, 15:39

Jason's age is 1 2 of his brother's age. His brother's age can be represented by the expression 12a - 9. Write an expression that can be used to represent the sum of their ages. A) 12a - 5.5 B) 18a - 13.5 C) 18a + 21 Eliminate D) (12a-9) 2

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Daphne Everett · Answer 1

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.