Writing an Algebraic Expression with Parent White the expression. Then, check all that apply six times the sum of nine and a number Key Words Replace With Replace a number with the variable, n. The two operations are multiplication and addition The two operations are multiplication and subtraction The constants are 6 and 9. The expression is written as 6n +9. The expression is written as 6(9 + n). 6 SEX the sum of a numberHEL PLEASE ​