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

Step-by-step explanation:

Jason's age is of his brother's age.

Brother age is

Sum of their ages = Age of Jonson + age of his brother

Jonson's age = half of his brother age

Sum of their ages =  

Take common denominator 2

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two

step-by-step explanation: