Respuesta :

You want to substitute a for 9 giving you 19 + 6 * 9 / 2. Following order of operations you would do 6*9 which equals 54 and divide that by 2 which equals 27. 27+19= 46. Therefore, your answer is 46.
19 + 6x9= 73. 73 divided by 2 = 36.5